thanks for this very informative video,,, I have a question though what if I heated the alloy to 800 and then quenched it rapidly all the way to room temperature without holding seconds in between. Then what phases will I have?
thanks for your reply +MELearn UTRGV the question I am trying to solve is I am working with 2 steels 1045 and 1022 I am doing two experiments for both steels exp 1: heating to 900C and then quenching in oil heating to 900C and then quenching in water exp 2: heating to 800C and then quenching in oil heating to 800C and quenching in water assuming cooling rate for oil is 75C/sec and assuming cooling rate for water is 300C/sec. what phases will I have for them? thanks
I have a question.. @3:50 you said: "When you hit the Solidus line" describing the solidification process, although solidification starts when you hit the Liquidus line, it ends when you hit the Solidus line, doesn't it?
When cooling from the molten state, solidification begins when you reach the liquidus line, continues as you cool through the two phase liquid-solid region and then finishes when you hit the solidus line. Note that these are equilibrium diagram temperatures so a practical cooling rate will not begin solidification at exactly the diagram indicated liquidus temperature (usually slightly lower) nor finish at the diagram indicated solidus temperature (again probably slightly lower). The slower you cool (that is the closer you keep the entire system to equilibrium) the closer the actual temperatures will be to the diagram values. If you cool really fast, some systems can achieve a super-cooled liquid state which will solidify rapidly once initiated. The King of Random has some nifty experiments you can do with super-cooled water: th-cam.com/video/sQdLttUh_b0/w-d-xo.html - Dr. Jones
Thank you University of Texas, class is for students without TH-cam
Excellent presentation
This is a really good video! thank you very much :)
very well presented. thank you. x10000000 likes
i was watching alien videos how did i get here lol
+erasmo hinojosa this is a education video for are materials class
It's usually the other way around
very helpful. thank ou
thanks for this very informative video,,,
I have a question though
what if I heated the alloy to 800 and then quenched it rapidly all the way to room temperature without holding seconds in between. Then what phases will I have?
If it's 800C it's 100% Martensite. If it's 800F, then it would be considered a reheat.
thanks for your reply +MELearn UTRGV
the question I am trying to solve is
I am working with 2 steels 1045 and 1022
I am doing two experiments for both steels
exp 1:
heating to 900C and then quenching in oil
heating to 900C and then quenching in water
exp 2:
heating to 800C and then quenching in oil
heating to 800C and quenching in water
assuming cooling rate for oil is 75C/sec and
assuming cooling rate for water is 300C/sec.
what phases will I have for them?
thanks
If you have your continuous cooling curves for both of these steels, you can email them at melearn.utrgv@gmail.com.
I have a question..
@3:50 you said: "When you hit the Solidus line" describing the solidification process, although solidification starts when you hit the Liquidus line, it ends when you hit the Solidus line, doesn't it?
When cooling from the molten state, solidification begins when you reach the liquidus line, continues as you cool through the two phase liquid-solid region and then finishes when you hit the solidus line. Note that these are equilibrium diagram temperatures so a practical cooling rate will not begin solidification at exactly the diagram indicated liquidus temperature (usually slightly lower) nor finish at the diagram indicated solidus temperature (again probably slightly lower). The slower you cool (that is the closer you keep the entire system to equilibrium) the closer the actual temperatures will be to the diagram values.
If you cool really fast, some systems can achieve a super-cooled liquid state which will solidify rapidly once initiated. The King of Random has some nifty experiments you can do with super-cooled water: th-cam.com/video/sQdLttUh_b0/w-d-xo.html
- Dr. Jones