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Effect of Strain Rate on Mechanical Properties of Fe-30Mn-3Si-4Al TWIP Steel

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Abstract:

Influence of strain rate on mechanical properties of Fe-30Mn-3Si-4Al TWIP steel was studied by compression experiments, indicating that TWIP steel has strain rate softening effect, strain rate insensitivity, and also strain rate hardening effect. According to strain rate sensitivity m changing with strain rate, effect of strain rate on TWIP steel mechanical properties can be divided into three stages: quasi-static stage with strain rate ranging from 0.001 to 100 1/s; high-strain rate stage with strain rate ranging from 701 to 5108 1/s; super-high-strain rate stage with strain rate ranging from 10335 to 30147 1/s. Adiabatic temperature rise tends to increase with strain rate. Strain hardening exponent is divided into three parts: dislocation strengthening stage, twinning strengthening stage and thermal softening stage.

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Periodical:

Advanced Materials Research (Volumes 581-582)

Pages:

1018-1022

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.581-582.1018

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Online since:

October 2012

Authors:

Zhi Ping Xiong, Lei Gang Gu, Ye Ke Wang, Ji Cheng Zhao, Wei Ping Bao, Xue Ping Ren

Keywords:

SHPB, Strain Hardening Exponent, Strain Rate Sensitivity, TWIP Steel

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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