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AMIE Exam Lectures- Material Science | Material Design - Part 4 | Martensite & Transformation | 9.4

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Engineering Subjects: Material Science and Engineering: Material Science | Material Design - Part 4 | Martensite | What is Martensite transformation | 9.4 Introduction - : Previous Lecture - CCT Diagrams Present Lecture - Martensitic Transformation Martensitic Transformation - : It is formed by diffusionless transformation of austenite. - Rapid quenching to low temperature - supersaturated with carbon - Instantaneous Transformation Lower the temperature more the Martensite There is no martensite finish line, means we can never get 100% of martensite formation. Retained Austenite - Austenite remains in conversations is known as Retained Austernite. By seeing the cooling curve, we can decide the schedule which needs to be followed, which gives different microstructure. Different phases of the material. Click Here For Playlist https://www..com/playlist?list=PLJumA3phskPFPkGEkQe6YWZs8Z1-9xkkg All Right Reserved.
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Text Comments (13)
chanti Chinnu (1 month ago)
Edupedia World (1 month ago)
Thanks Chanti Chinnu. Glad you liked our video. Visit our channel and watch more videos choosing from a collection of around 6000 videos in 100s of different subjects: https://www.youtube.com/channel/UC6E97LDJTFJgzWU7G3CHILw/playlists?shelf_id=0&sort=dd&view=1 Alternatively browse through our newly launched website www.edupediaworld.com and watch the video you want to learn. Watch, Share and Stay Tuned. Best Wishes and Happy learning.
yildiranmete (5 months ago)
Is there anything related to be a fine or coarse in the phases of Bainite and Martensite ?
Edupedia World (5 months ago)
Nice explanation. Thanks Sabyasachi Roy.
Sabyasachi Roy (5 months ago)
Bainite has upper (high temperature) and lower bainite (low temperature) structure depending on the temperature. We have not discussed the structure in any details in this series of lectures. Study of bainite is quite comprehensive and in fact there are competing school of thoughts; some scientists think that bainite formation is diffusive in nature (as i mentioned) but many other scientist believe it is displacive (diffusionless). There are experimental evidence supporting both mechanisms, therefore bainite is still a subject of much debate in the scientific community. I tried to avoid going into the details and just wanted to introduce the basic concepts.
Edupedia World (5 months ago)
We have some topics on "Bainite and Martensite". Refer to the following videos: https://www.youtube.com/watch?v=HCv2LDFfuPc&t=0s&index=47&list=PLJumA3phskPFPkGEkQe6YWZs8Z1-9xkkg https://www.youtube.com/watch?v=bLvyyFzzFgg&t=0s&index=48&list=PLJumA3phskPFPkGEkQe6YWZs8Z1-9xkkg https://www.youtube.com/watch?v=eCGomXKlhuI&t=0s&index=49&list=PLJumA3phskPFPkGEkQe6YWZs8Z1-9xkkg Refer to the complete playlist fo rmore videos in this subject: https://www.youtube.com/playlist?list=PLJumA3phskPFPkGEkQe6YWZs8Z1-9xkkg Best Wishes.
mā ğý (5 months ago)
Sir, you're amazing That was really helpful
Edupedia World (5 months ago)
Great to know it was helpful. Share with your friends, and stay tuned.
Edupedia World (5 months ago)
We are glad that you find it useful, Stay Tuned more such videos coming up.
jai prakash mahato (7 months ago)
Edupedia World (7 months ago)
Thank You and Stay Tuned!
Amaan Arshad (11 months ago)
What if we first convert all the austenite into perlite and than suddenly cool it.. Will it not give martensite..
zarrar20ify (11 months ago)
No it will not .Pearlite is a stable phase .It wont change into martensite bcz the structure has already undergo diffusion to form lamellar structure .It doesnt need to change its phase since its the most stable with minimum free energy .Same goes for Bainite also , once it forms , it will retain .

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