Effects of Si on the Microstructure and Work Hardening Behavior of Fe?17Mn?1.1C?xSi High Manganese Steels

Renlong Xiong; Yi Liu; Haitao Si; Huabei Peng; Shanling Wang; Binhan Sun; Hanxin Chen; Hyoung Seop Kim; Yuhua Wen

doi:10.1007/s12540-020-00846-y

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자료유형: 학술저널

저자정보: Renlong Xiong (Wuhan Institute of Technology) Yi Liu (Wuhan Institute of Technology) Haitao Si (Sichuan University) Huabei Peng (Sichuan University) Shanling Wang (Sichuan University) Binhan Sun (McGill University) Hanxin Chen (Wuhan Institute of Technology) Hyoung Seop Kim (Pohang University of Science and Technology (POSTECH)) Yuhua Wen (Sichuan University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.10

발행연도: 2021.10

수록면: 3,891 - 3,904 (14page)

DOI: 10.1007/s12540-020-00846-y

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In order to improve the work hardening capacity under low stresses and the yield strength of conventional Hadfield steels, theeffects of Si on the microstructure and work hardening behavior of the Fe?17Mn?1.1C?xSi steels under both quasi-statictensile and low load impact are investigated. It is shown that the increase of the Si contents remarkably improves the yieldstrength by 36 MPa per 1 wt% Si in the investigated steel system without significant sacrifice of ductility. The decreasingeffect of Si on the stacking fault energy is strongly affected by carbon, although the variation of carbon content was small. This led to the unexpected similar stacking fault energy between 1Si and 2Si steel. With the increase of the Si contents forthe steels, the critical strain for the onset of mechanical twinning was lowered, which was controlled by the cooperationbetween the stacking fault energy and solid solution strengthening of Si. This resulted in the earlier initiation of mechanicaltwins and an increase in the twin volume fraction. Therefore, the work hardening capacities under both quasi-static tensileand low load impact tests were enhanced. It was also found that the impact deformation decreased as more mechanical twinsabsorbed the impact energy.

#High manganese steels #Mechanical twinning #Stacking fault energy #Critical strain #Si content

참고문헌 (49)

참고문헌 신청

J.R. Davis / 1990 / Metals Handbook. Properties and Selection: Irons, Steels, and High-Performance Alloys, vol. 1 / ASM International :822~840

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