@@introductiontomaterialsscience yes sir, it will be helpful. btw, i have enjoyed watching all your lectures. Currently i am pursuing Mtech from NIT Kkr & they have been very helpful. Thanks a lot sir for replying.
Sir can you please let me know, which metal stays cold longer at room temperature once cooled below zero ....Aluminium or steel or cooper ....for example if all the three are cooled together which will get warm the fastest ??
Difficult question. Let me try. Amount of heat required to raise the temperature by 1 degree is specific heat. Specific heats of Cu, steel and Al are 380, 500 and 920 Jkg^-1K^-1. So Al will require maximum heat to raise its temperature by a given degrees. So if we provide heat at a constant rate then Al will heat up most slowly. But I suppose thermal conductivities will also play some role.
@@introductiontomaterialsscience sir thank you.....I tried a simple experiment at home... Placed three metals in fridge for two hours... And later let them come to room temperature... Steel remained cold much longer then copper and aluminum....
@@irfanghazanfar28 thermal diffusivity plays more important role than thermal conductivity in this analysis Its questions related to unsteady heat transfer ,u can check examples like this and easily solve with equation based on lumped-parameter
You provide very nice, clear and easily understandable explanations. Thanks Sir
Beautifully explained... Thank to so much
this man is legend
after so much finding for TTT curve, I got this. My suggestion for sir- plz make another section for heat treatment process.
Currently, heat treatment videos are in the 'phase transformation' playlist. Do you mean a separate playlist for heat treatment?
@@introductiontomaterialsscience yes sir, it will be helpful. btw, i have enjoyed watching all your lectures. Currently i am pursuing Mtech from NIT Kkr & they have been very helpful. Thanks a lot sir for replying.
Why are " 70-30 brass components subjected to low temperature annealing?"
Sir, can you deliver a lecture on thermal distortions in heat treatment process. Thank you.
Sir, please make lectures on Surface Hardening Processes also.
Sir can you please let me know, which metal stays cold longer at room temperature once cooled below zero ....Aluminium or steel or cooper ....for example if all the three are cooled together which will get warm the fastest ??
Difficult question. Let me try. Amount of heat required to raise the temperature by 1 degree is specific heat. Specific heats of Cu, steel and Al are 380, 500 and 920 Jkg^-1K^-1. So Al will require maximum heat to raise its temperature by a given degrees. So if we provide heat at a constant rate then Al will heat up most slowly. But I suppose thermal conductivities will also play some role.
@@introductiontomaterialsscience sir thank you.....I tried a simple experiment at home... Placed three metals in fridge for two hours... And later let them come to room temperature... Steel remained cold much longer then copper and aluminum....
@@irfanghazanfar28 So your experiments clearly show that an analysis based on specific heat alone is not justified.
@@introductiontomaterialsscience sir grateful for your support... appreciate it truly
@@irfanghazanfar28 thermal diffusivity plays more important role than thermal conductivity in this analysis
Its questions related to unsteady heat transfer ,u can check examples like this and easily solve with equation based on lumped-parameter
Which Companies r manufacturing crca steel coil
What is meant by Annealing texture?
texture is the orientation of the crystals
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