Extremely awesome, for the first time got interest to see the second part even though it is of higher running time. It was worthy to watch it too.....was searching for such a video ....well done sir..!!
best example of subltle humour and how material science can be fun to teach and learn. Thank you sir for your efforts. This is by far the best explanation on any subject in any of the nptel lectures i have come across. Thank you for your time sir.
Thank you, a have a test tommorrow at my UNI and I've missed the lecture on this topic and you've really helped me a lot! Thanks again, I just love the videos you publish!
Really you too good sir , thanks for these videos it make to me understand engineering materials well .......thanks for this ME series of videos . We love you sir
Thanks for your lecture. I works in aluminium extrusion factory. I would beg you to explained as easiest that you can for medium students like me. The process is heated billet 7 inch to 480C and extruded to 530C aprox and later tempering in a fan current 10 m ( to quenching 30 m/min) yo get 250C . And later agening. Thanks
Higher the average size of the precipitate lesser will be its effectiveness in strengthening. I am not really sure how the distribution will affect the properties.
If you do normalizing, that is slower cooling than quenching you may not be able to retain high temperature solid solution. Precipates will form while cooling itself. But this will happen at higher temperatures than used for aging after quenching. Precipates formed at higher tempeartures will be coarse and not as effective as fine ppts formed at lower aging temperatures.
Sir I am a regular viewer of your material class's , please suggest me how to study material for gate because my gate paper is polymer science and material science
After solution Treatment we do ageing. in Ageing after holding the sample at elevated temp. do we have to necessarily do air cooling or can we perform water quenching .???
@@himanshushekhar4524 Cooling rate after aging should not matter. So you can either fast cool (quench) or skow cool (air) or very slow cool (furnace). Furnace cooling and air cooling in this case will not usually be called annealing or normalizing respectively. These terms are common for cooling of austenite phase in steel.
"Because peak hardening is highest by definition, it is the highest", Er,...with all due respect, how is that even a reason to why a material's hardness should decrease with over-aging?
@@introductiontomaterialsscience LOL!! I got it so it can't be all that confusing, I'm not THAT bright! :) ...which is why I really appreciate your video. Only somebody with a real grasp on their subject can make an explanation which the layman can then also grasp. Thanks!
