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Effect of Different Strain on Microstructure Evolution of Medium Carbon Steel

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Abstract:

Uniaxial hot compression simulation experiment at 700°C with different true strain was carried out to study the microstructure evolution of medium carbon steel, the predominant mechanism on the cementite softening has been explored, the experimental results show that the volume fraction of deformation induced ferrite (DIF) increased with increasing true strain and even exceeds the equilibrium content. With the increase of DIF, more and more carbon atoms congregated in the boundaries such as the interface of DIF and the interphase of DIF/deformation austenite. Carbon congregation provides the right carbon content and the optimized microstructure for divorced decomposition during the process of controlled cooling. Therefore spherical or rod-like cementite and degenerated pearlite can be obtained.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

923-928

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.923

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Online since:

January 2013

Authors:

Peng Tian, Zhi Yong Zhong, Wei Jun Hui, Rui Guo Bai, Xing Li Zhang

Keywords:

Deformation Induced Ferrite, Medium Carbon Steel, Microstructure Evolution

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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