Thanks for a wonderful idea,, i miss work like this,,im also work as NDT coordinator for a past 3yrs in SAUDI ARABIA.. more videos to upload ,,nice one🥰 sending full support..
Bro guide me I have IRATA level 1.I am here in UAE working as glass cleaner.I want to come in this NDT field.I am graduate and 2 years experience in paints.WHICH is best field in NDT for earning ,job and future
best videos to take brief info about ultrasonic testing...nyc editing especially that of real solid cylinder...i like that...n of course with vry good explanation..tqsm..
Answer to "Sorry I can't get why the display shows two echoes...what do you mean by double reflection?" The ultrasonic pulse moves down to the defect. It is reflected there and travels back to the top of the cylinder. Here it is reflected again and travels down once more. It is reflected again by the defect and travels upwards. This can happen many times.
Thanks, that was a simple and clearly illustrated explanation. Now I have a question: Is ultrasonic testing suitable for testing timber or wood composite materials for defects or contamination? I'm looking for ways to detect metallic objects embedded in timber, plywood, MDF etc. Any suggestions would be most welcome.
Answer to "Now I have a question: Is ultrasonic testing suitable for testing timber or wood composite materials for defects or contamination? I'm looking for ways to detect metallic objects embedded in timber, plywood, MDF etc. Any suggestions would be most welcome." In principle yes, but due to the fiber structure of wood you have to use low frequencies, and that means low resolution (only very large metal lumps can be detected). So practically: no, I'm afraid. Alternatives: X-ray testing works very well, with some restrictions also eddy current testing.
Answer to "What is the central frequency of the probe? I'd like to compare it with medical ultrasound, where we use MHz.": In our experiments we have used a frequency of 4 MHz. In most industrial applications the frequency may vary from 1 to 10 MHz, but could in rare cases be as low as 100 kHz and as high as 100 MHz.
Answer to "differentiating crack echo and contour echo seems difficult": Yes, this is an important point, and not always an easy one. The ideal solution in this case is to use an additional probe that transmits the ultrasonic waves at 45° to lower right direction and then compare the results.
Answer to "Why there is "double reflection on the same imperfection" for the saw cut and no for the drill hole ?. Thanks in advance.": In principle, double reflection can occur at any defect. In the case of the drill hole, the travel time for the double reflection is outside the selected time scale of the monitor. To display it, the time scale of the monitor (axis to the right) must be enlarged, which is easy to do, just two clicks, and then you can see the double reflection on the monitor.
Why is the 45 degree-angle ultrasonic transducer is used in detecting flaws within the axle? Moreover, how do you tell whether or not only the contour echoes are recorded in your result by looking at the meter?
+Bettevis "Why is the 45 degree-angle ultrasonic transducer is used in detecting flaws within the axle?" If the transducer transmits ultrasonic impulses running parallel to the cracks, there will be no echo from the cracks. 45 degrees are perfect to send the ultrasonic impulses back to the transducer. "Moreover, how do you tell whether or not only the contour echoes are recorded in your result by looking at the meter?" This, indeed, is a difficult point. The contour echoes have been studied in detail on perfect samples. Any echoes in addition to those from the perfect samples indicate a defect. Moreover, the contour echoes are different in "shape".
+MaterialsScience2000 +Bettevis In relation to your answer to the second question, not quite. Before the scans are conducted, any contours or geometrical features are mapped out in correct schematics (or software tools like ESBeam). This allows the technician to identify which indications are contours and which are defects.
If S-waves are supossed not to travel trough water, why and how are they used for Ultrasonic Imaging and Flaw Detection in pipes? Pipes conducting water? Thanks
Answer to "If S-waves are supossed not to travel trough water, why and how are they used for Ultrasonic Imaging and Flaw Detection in pipes? Pipes conducting water? Thanks" S-waves (transverse waves) indeed do not travel through water, but they may travel through the Pipeline material itself. So this might explain your answer. However, mostly longitudinal waves are used for ultrasonic inspection.
Answer to "Thanks for the video. Can you please share the details of the ultrasonic machine being used?": It is the commercial programme/machine USLT 2000 by Krautkramer/GE Inspection Technologies, quite old in the meantime. The probe was a comparatively large standard Krautkramer 4 MHz probe.
Answer to "I did not really get the point of double reflection at 5:15" When the ultrasonic pulse is transmitted, it travels to the defect, there it is reflected and travels back to the top surface, where it is reflected again. It then travels again to the defect, where it is refelcted another time and comes back again - like a multiple echo in a large church.
Answer to "what was the reason of double reflection?": Double (and multiple) reflection occurs, when the ultrasonic impulses are reflected again by the surface where they were sent out, then again by the back wall (or defect), and so on . It is the same effect that occurs in a large room like a church (multiple echoes).
sound waves are like a a rubber ball. Drop the ball and it will bounce a number of times. As the energy of the ball dissipates the height of ball will get less and less. So does the sound waves. The distant between the reflexion(time) of the waves will be equal but the height(intensity) of the wave will be less and less until all the energy of the waves been reduced to 0. When the monitor has been set a varying scale the number of indications(reflexions) will show based on the scale. ex. if the scale is set a 2 inches the a 1" indication will have a reflexion at the beginning (initial reflexion) at middle(1" mark) and at the end(2" mark). When the scale is set for 5 inches then the reflexion will be at initial and then 1",2",3",4",5" marks. You(operator) will determine the size of the scale on the monitor and use a calibration block(predetermine step block cut at know distances(depths) to determine where the marks are.(a 4" step block will have marks set at 1" 2" 3" 4", and a 1" step block will have marks set at .250", .500", .750" ,1.00".)
Answer to "Greta video, what software product is used here? thanks": Thanks as well; the software is Krautkramer USLT 2000. There are many alternatives on the market, which can be easily found on the Internet.
Answer to "I have a question, ultrasonic test is same as the ultrasonic test arrays? is this ultrasonic test arrays?": No, this is not a test array yet. Testing with arrays means testing with more than one transmitter and/or more than one receiver, which is a very interesting but also very complicated subject.
Answer to "what is the operating frequency and testing range of ultrasonic tester": In this video we used a fairly large probe and 4 MHz test frequency for demonstration. The test equipment can be used with many other frequencies and probes covering a wide range for almost all practical applications.
Answer to "For a beginner how would they be able to differentiate between a echo from a crack or echo from a contour. Please someone answer me. Thanks": This can be very difficult in some cases; even experts have their difficulties. The best method is to send the us waves from different directions (if possible).
Answer to "I am looking for a reference video material related to non-destructive testing, can it be used?": Sorry, no downloading allowed and no use whatsoever. But links to the videos are always possible - and welcome.
The probe is connected to a rather small box, that contains all electronic equipment necessary for operation (high voltage supply, amplifieres etc). This small box is connected to a plug-in-card in the computer.
Answer to "What's the main function of the couplant": The probe touches the surface of the sample only in some very small places, and the contact area between the probe and the sample is extremely small. On most of the area between the probe and the sample, there is a small gap, and without a couplant, the sound waves would be reflected back into the probe. The couplant fills the gap and enables an "acoustic coupling" of the probe and the sample, and ensures a good transmission of the sound waves from the probe into the sample - and back.
Answer to "How to differentiate between contour echo and a defect echo?": This is one of the most important points in ultrasonic testing, and not always easy one. The best way to solve the problem is to additionally inspect a defect-free sample; then only the contour echoes are visible. This is typically done in mass production. If no defect-free additional sample is available, but the geometry is known, then the contour echoes can be calculated using the speed of sound in the material (and some additional information). However, if it is a unique sample and the geometry is completely unknown (and not accessible), then it becomes difficult. However, contour echoes are slightly different from defect echoes, and experienced workers can distinguish them.
Answer to "How did the wave not spread and disperse?": The beam actually widens, diverges and disperses. The video is simplified and does not show this effect. However, there are probes on the market that can focus the ultrasonic wave to a certain degree. This results in less divergence of the wave and/or focusing.
Answer to "Is it possible to detect cracks without touching the surface? is there a technology that exists that detects internal defects without direct contact?": Yes, but both the test piece and the transducer have to be submerged in water or a similar liquid. The results are not quite as good as the technique to use thin layers of couplants, but still it works nicely.
Is there any crack detection sensor available for microcontrollers? I need it urgently in my project...Any help will be greatly appreciated. Thanks in advance :)
Sir.. can you please tell mi .. which type of sensor you use .... Because my project is to detect tr crack in concrete .... So which type of sensor i can select ....
Answer to "Sir.. can you please tell mi .. which type of sensor you use .... Because my project is to detect tr crack in concrete .... So which type of sensor i can select ...." We have used a very common standard Krautkramer 4 MHz probe. Concrete is a special material, sorry, I am no expert in this area.
Answer to "Can this work at higher temperatures and pressures?" Yes, just like at room temperature. It is necessary to use special transducers and couplants designed especially for this purpose.
Answer to "Is ultrasound and ultrasonic the same?": Yes and no, it depends on the context. Ultrasound is mostly used as a noun, ultrasonic as adjective.
Answer to "is any body know how i make my computer as Ultrasonic flaw detectors": You need the software (I don't know of any freeware), the hardware (the power and measurement part), and a US probe. All this is highly specialized and usually quite expensive. But maybe someone knows a cheap variant ...
Answer to "What kind of program for testing do you use in computer?": It is the commercial programme USLT 2000 by Krautkramer/GE Inspection Technologies
Answer to "can i know what type of transducer you use? and what application in your laptop that you use to produce the Output?": The transducer is a Krautkramer K4G (4 MHz), the programme USLT 2000. There are many similar products on the market.
Answer to "can this video shared on social media?" I am afraid no, in any case not by copying it, this is not allowed. But placing links to the TH-cam video may be done anytime. So just use links to the video ...
Answer to "please upload radiographic testing": There is a video on radiographic testing (X-ray inspection and Industrial computed tomography), I hope this is what you are looking for.
Couldn't move my eyes from the screen even for a fraction of a second! what an explanation!
This is the best example of a clear cut explanation of a subject ❤️
Shey
😅
The cylinder thing defines everything clearly. Excellent
what a clean video. Engaging and straightforward. Thank you!
Outstanding explanation! It can't be better. Thanks so much!
One of the best video of Ultrasonic test...Thanks
That is the cleanest USN 52 I have ever seen in use! It looks like it was manufactured yesterday.
Very well explained with real time graphical images..
bhai aap ndt pe work krte ho
call 9560343386
bhai aap ndt pe work krte ho
call 9560343386
INSPECTION OF TUBE WELDS USING ULTRASONIC ANGLE BEAM TRANSDUCERS رجاء اريد مساعده في بحث
ragafathee199@gmail.com
How are you ?
I have a machine can you determine what is it's work?
That was the best explanation of UT in youtube.
Thanks for a wonderful idea,, i miss work like this,,im also work as NDT coordinator for a past 3yrs in SAUDI ARABIA.. more videos to upload ,,nice one🥰 sending full support..
Bro guide me I have IRATA level 1.I am here in UAE working as glass cleaner.I want to come in this NDT field.I am graduate and 2 years experience in paints.WHICH is best field in NDT for earning ,job and future
Explained in a simple & perfect manner.
World's perfect Ultrasonic testing Video:) Great
simple and superb clearly explained
Enna Purichu ungaluku
This is really simple and easy to understand, thanks!
Thanks for this video. I have joined the NDT Class so this video is very useful for us.
best videos to take brief info about ultrasonic testing...nyc editing especially that of real solid cylinder...i like that...n of course with vry good explanation..tqsm..
Very well explained with real time graphical images.. Kudos (y)
INSPECTION OF TUBE WELDS USING ULTRASONIC ANGLE BEAM TRANSDUCERS هل من فكره اريد مساعده رجاء
ragafathee199@gmail.com
Bro tamil la ninga
Very clear,easy and helpful videos on this channel.
5:17 Sorry I can't get why the display shows two echoes...what do you mean by double reflection?
Answer to "Sorry I can't get why the display shows two echoes...what do you mean by double reflection?" The ultrasonic pulse moves down to the defect. It is reflected there and travels back to the top of the cylinder. Here it is reflected again and travels down once more. It is reflected again by the defect and travels upwards. This can happen many times.
this channel is the best. all ndt videos are clear and very informative, nice
the fact that it is explained that the shock wave has 2 components (a tensile and compression component) is a major plus
Thanks, that was a simple and clearly illustrated explanation.
Now I have a question: Is ultrasonic testing suitable for testing timber or wood composite materials for defects or contamination? I'm looking for ways to detect metallic objects embedded in timber, plywood, MDF etc. Any suggestions would be most welcome.
Answer to "Now I have a question: Is ultrasonic testing suitable for testing timber or wood composite materials for defects or contamination? I'm looking for ways to detect metallic objects embedded in timber, plywood, MDF etc. Any suggestions would be most welcome." In principle yes, but due to the fiber structure of wood you have to use low frequencies, and that means low resolution (only very large metal lumps can be detected). So practically: no, I'm afraid. Alternatives: X-ray testing works very well, with some restrictions also eddy current testing.
Great presentation. Simple and effective. :)
What is the central frequency of the probe? I'd like to compare it with medical ultrasound, where we use MHz.
Answer to "What is the central frequency of the probe? I'd like to compare it with medical ultrasound, where we use MHz.": In our experiments we have used a frequency of 4 MHz. In most industrial applications the frequency may vary from 1 to 10 MHz, but could in rare cases be as low as 100 kHz and as high as 100 MHz.
thanks.
7:40 differentiating crack echo and contour echo seems difficult
this seems can check metal fatigue from car made with kobe steel which has false certification data.
Answer to "differentiating crack echo and contour echo seems difficult": Yes, this is an important point, and not always an easy one. The ideal solution in this case is to use an additional probe that transmits the ultrasonic waves at 45° to lower right direction and then compare the results.
Well explained, test tomorrow 😁
Best explanation of ultrasonic testing
best teach and good examples for easily understand, thank you
Can someone please explain what is “doubling” in ultrasonic gauge
Best explained video ever...thanks to the creator..
Hi friends. Somebody know How unlock the keypad of the krautkramer DMS ????
It powers on but I CAN NOT USE IT . Thanks for help me .
Can you tell me what is the make used for detecting crack in laboratory in this video
Thank you very much for sharing a valuable information. 👍
Thank you so much. Clear and helpful.
Why there is "double reflection on the same imperfection" for the saw cut and no for the drill hole ?. Thanks in advance.
Answer to "Why there is "double reflection on the same imperfection" for the saw cut and no for the drill hole ?. Thanks in advance.": In principle, double reflection can occur at any defect. In the case of the drill hole, the travel time for the double reflection is outside the selected time scale of the monitor. To display it, the time scale of the monitor (axis to the right) must be enlarged, which is easy to do, just two clicks, and then you can see the double reflection on the monitor.
Why is the 45 degree-angle ultrasonic transducer is used in detecting flaws within the axle? Moreover, how do you tell whether or not only the contour echoes are recorded in your result by looking at the meter?
+Bettevis "Why is the 45 degree-angle ultrasonic transducer is used in detecting flaws within the axle?" If the transducer transmits ultrasonic impulses running parallel to the cracks, there will be no echo from the cracks. 45 degrees are perfect to send the ultrasonic impulses back to the transducer. "Moreover, how do you tell whether or not only the contour echoes are recorded in your result by looking at the meter?" This, indeed, is a difficult point. The contour echoes have been studied in detail on perfect samples. Any echoes in addition to those from the perfect samples indicate a defect. Moreover, the contour echoes are different in "shape".
+MaterialsScience2000 +Bettevis In relation to your answer to the second question, not quite. Before the scans are conducted, any contours or geometrical features are mapped out in correct schematics (or software tools like ESBeam). This allows the technician to identify which indications are contours and which are defects.
If S-waves are supossed not to travel trough water, why and how are they used for Ultrasonic Imaging and Flaw Detection in pipes? Pipes conducting water? Thanks
Answer to "If S-waves are supossed not to travel trough water, why and how are they used for Ultrasonic Imaging and Flaw Detection in pipes? Pipes conducting water? Thanks"
S-waves (transverse waves) indeed do not travel through water, but they may travel through the Pipeline material itself. So this might explain your answer. However, mostly longitudinal waves are used for ultrasonic inspection.
I almost went deaf from watching this. That painted can experiment made my ears rumble.
Can the metal in a food be detected with ultrasonic waves?
Thanks for the video. Can you please share the details of the ultrasonic machine being used?
Answer to "Thanks for the video. Can you please share the details of the ultrasonic machine being used?": It is the commercial programme/machine USLT 2000 by Krautkramer/GE Inspection Technologies, quite old in the meantime. The probe was a comparatively large standard Krautkramer 4 MHz probe.
I did not really get the point of double reflection at 5:15
Answer to "I did not really get the point of double reflection at 5:15" When the ultrasonic pulse is transmitted, it travels to the defect, there it is reflected and travels back to the top surface, where it is reflected again. It then travels again to the defect, where it is refelcted another time and comes back again - like a multiple echo in a large church.
Awesome explanation, great channel.
what was the reason of double reflection?
Answer to "what was the reason of double reflection?": Double (and multiple) reflection occurs, when the ultrasonic impulses are reflected again by the surface where they were sent out, then again by the back wall (or defect), and so on . It is the same effect that occurs in a large room like a church (multiple echoes).
Acoustic impedance mismatches between the material in test and its surroundings (boundaries) or cavities within
sound waves are like a a rubber ball. Drop the ball and it will bounce a number of times. As the energy of the ball dissipates the height of ball will get less and less. So does the sound waves. The distant between the reflexion(time) of the waves will be equal but the height(intensity) of the wave will be less and less until all the energy of the waves been reduced to 0. When the monitor has been set a varying scale the number of indications(reflexions) will show based on the scale. ex. if the scale is set a 2 inches the a 1" indication will have a reflexion at the beginning (initial reflexion) at middle(1" mark) and at the end(2" mark). When the scale is set for 5 inches then the reflexion will be at initial and then 1",2",3",4",5" marks. You(operator) will determine the size of the scale on the monitor and use a calibration block(predetermine step block cut at know distances(depths) to determine where the marks are.(a 4" step block will have marks set at 1" 2" 3" 4", and a 1" step block will have marks set at .250", .500", .750" ,1.00".)
Great video, what software product is used here? thanks
Answer to "Greta video, what software product is used here? thanks": Thanks as well; the software is Krautkramer USLT 2000. There are many alternatives on the market, which can be easily found on the Internet.
I have a question, ultrasonic test is same as the ultrasonic test arrays? is this ultrasonic test arrays?
Answer to "I have a question, ultrasonic test is same as the ultrasonic test arrays? is this ultrasonic test arrays?": No, this is not a test array yet. Testing with arrays means testing with more than one transmitter and/or more than one receiver, which is a very interesting but also very complicated subject.
How to maney bim path calculate calibration please reply me thanku sir ####
5:05 IS THAT THE ECHO OF 87
Why did u use the gell to that cylindrical thing, and then it worked? What was that cylindrical thing and how does it work?
To eliminate the gap between the transducer and test piece sir
very very nice ... This is science 4 Mech
Great explanation, very easy to understand!
Muy bueno, directo para los preguntones que no necesariamente se ven involucrados en las NDT's
what is the operating frequency and testing range of ultrasonic tester
Answer to "what is the operating frequency and testing range of ultrasonic tester": In this video we used a fairly large probe and 4 MHz test frequency for demonstration. The test equipment can be used with many other frequencies and probes covering a wide range for almost all practical applications.
For a beginner how would they be able to differentiate between a echo from a crack or echo from a contour. Please someone answer me. Thanks
Answer to "For a beginner how would they be able to differentiate between a echo from a crack or echo from a contour. Please someone answer me. Thanks": This can be very difficult in some cases; even experts have their difficulties. The best method is to send the us waves from different directions (if possible).
Sir, what is the difference between A435 vs A578? Both are same?
I am looking for a reference video material related to non-destructive testing, can it be used?
Answer to "I am looking for a reference video material related to non-destructive testing, can it be used?": Sorry, no downloading allowed and no use whatsoever. But links to the videos are always possible - and welcome.
in this video could u pls tell me where probe was connected to?? i m not seeing any UFD here...if possible pls explain!!
The probe is connected to a rather small box, that contains all electronic equipment necessary for operation (high voltage supply, amplifieres etc). This small box is connected to a plug-in-card in the computer.
thanq
MaterialsScience2000 my iPhone Error software update
Well explained, thank you very much :D
What's the main function of the couplant
Answer to "What's the main function of the couplant": The probe touches the surface of the sample only in some very small places, and the contact area between the probe and the sample is extremely small. On most of the area between the probe and the sample, there is a small gap, and without a couplant, the sound waves would be reflected back into the probe. The couplant fills the gap and enables an "acoustic coupling" of the probe and the sample, and ensures a good transmission of the sound waves from the probe into the sample - and back.
What is the name of the UT machine’s model used in the video?
Answer to "What is the name of the UT machine’s model used in the video?": It is a "Krautkramer USLT 2000" which is no longer on the market.
How to differentiate between contour echo and a defect echo?
Answer to "How to differentiate between contour echo and a defect echo?": This is one of the most important points in ultrasonic testing, and not always easy one. The best way to solve the problem is to additionally inspect a defect-free sample; then only the contour echoes are visible. This is typically done in mass production. If no defect-free additional sample is available, but the geometry is known, then the contour echoes can be calculated using the speed of sound in the material (and some additional information). However, if it is a unique sample and the geometry is completely unknown (and not accessible), then it becomes difficult. However, contour echoes are slightly different from defect echoes, and experienced workers can distinguish them.
Great explanation. Thanks for sharing.
That was a great explanantion, thank you!
How did the wave not spread and disperse?
Answer to "How did the wave not spread and disperse?":
The beam actually widens, diverges and disperses. The video is simplified and does not show this effect. However, there are probes on the market that can focus the ultrasonic wave to a certain degree. This results in less divergence of the wave and/or focusing.
Is it possible to detect cracks without touching the surface? is there a technology that exists that detects internal defects without direct contact?
Answer to "Is it possible to detect cracks without touching the surface? is there a technology that exists that detects internal defects without direct contact?": Yes, but both the test piece and the transducer have to be submerged in water or a similar liquid. The results are not quite as good as the technique to use thin layers of couplants, but still it works nicely.
Explanation is very good 👍. Thanku
excellent explanation, with practical demo
awesome demo..... thanks for the video
Is there any crack detection sensor available for microcontrollers?
I need it urgently in my project...Any help will be greatly appreciated. Thanks in advance :)
Is anyone tell me that Can ufd done on solid shafts and it which probe ( angular or normal )
Thank you, its quite informative
can we implement that equipment as prototype ?
I loved this type of explanation
sooo what type of ultrasonic test is this?
Superb clearity. Thank you!
Sir.. can you please tell mi .. which type of sensor you use .... Because my project is to detect tr crack in concrete .... So which type of sensor i can select ....
Answer to "Sir.. can you please tell mi .. which type of sensor you use .... Because my project is to detect tr crack in concrete .... So which type of sensor i can select ...." We have used a very common standard Krautkramer 4 MHz probe. Concrete is a special material, sorry, I am no expert in this area.
this is a great video.
Well explained with practical use......expecting more videos like thz....thank u
Can this work at higher temperatures and pressures?
Answer to "Can this work at higher temperatures and pressures?" Yes, just like at room temperature. It is necessary to use special transducers and couplants designed especially for this purpose.
Is ultrasound and ultrasonic the same?
Answer to "Is ultrasound and ultrasonic the same?": Yes and no, it depends on the context. Ultrasound is mostly used as a noun, ultrasonic as adjective.
@@MaterialsScience2000 Huh
@@MaterialsScience2000 I mean do you test it the same way? Or are they different?
is any body know how i make my computer as Ultrasonic flaw detectors
Answer to "is any body know how i make my computer as Ultrasonic flaw detectors": You need the software (I don't know of any freeware), the hardware (the power and measurement part), and a US probe. All this is highly specialized and usually quite expensive. But maybe someone knows a cheap variant ...
Very well explain.... With real time... thanx..
I just started a class for NDT any good pointers
What a nice explanation.....
Thanks lot sir.......
What kind of program for testing do you use in computer ?
Answer to "What kind of program for testing do you use in computer?": It is the commercial programme USLT 2000 by Krautkramer/GE Inspection Technologies
Great video 💯
can i know what type of transducer you use? and what application in your laptop that you use to produce the output?
Answer to "can i know what type of transducer you use? and what application in your laptop that you use to produce the Output?": The transducer is a Krautkramer K4G (4 MHz), the programme USLT 2000. There are many similar products on the market.
INSPECTION OF TUBE WELDS USING ULTRASONIC ANGLE BEAM TRANSDUCERS اريد مساعده في بحث
Is that TR probe?
Answer to "Is that TR probe?" Yes, the probe transmits and receives ultrasonic waves.
İs the speaker Richard Dawkins?
can this video shared on social media?
Answer to "can this video shared on social media?" I am afraid no, in any case not by copying it, this is not allowed. But placing links to the TH-cam video may be done anytime. So just use links to the video ...
what's name of the gel that you use in the material?
+Jonius Christian Harefa UCA-2 is a common one
Hi sir ..please can upload defects pattern for ut.as per machine..i cant understand defect pattern please sir
Very well explained with real time graphical images yes so good
please upload radiographic testing
Answer to "please upload radiographic testing": There is a video on radiographic testing (X-ray inspection and Industrial computed tomography), I hope this is what you are looking for.
Awesome presentation
06:30 - Guys in the background busted doing what guys do at work.
Realmente muy bien explicado, muchísimas gracias ☺️
What kind of Sensor is that?
+borii6 Answer to "What kind of Sensor is that?" Just a standard impulse-echo-probe for 4 MHz frequency
Perfect explanation! Thanks a lot! 😊
You guys built the UFD?
Answer to "You guys built the UFD?": I am afraid no ... commercial unit (Krautkramer)
I have tested axle wheel with ultrasonic in my internship at INDIAN RAILWAY. 😍😍😍😍