Mechanical response and constitutive modeling of heat treated 22MnB5 steel

doi:10.13251/j.issn.0254-6051.2021.12.031

Abstract

Abstract: The cold-rolled 22MnB5 steel sheet was water quenched by heating at 750 ℃, 850 ℃ and 950 ℃ for 30 min, respectively, and then stretched at room temperature with strain rates of 0.0005, 0.001, 0.01 and 0.1 s^-1, respectively. The results show that as the heating temperature increasing, the yield strength and tensile strength also increase significantly due to the increase of lath martensite. In addition, as the increase of strain rate, the yield strength and tensile strength of the steel first increase and then decrease. Finally, based on the Voce constitutive model, the constitutive equation which can describe the mechanical behavior of 22MnB5 steel under different heat treatment processes and strain rates is constructed by introducing the strain rate term of Johnson-Cook constitutive model. The correlation coefficient (R) and average absolute relative error (AARE) are 0.993 and 3.15%, respectively.

Key words: 22MnB5 steel, heat treatment, mechanical response, constitutive modeling

CLC Number:

TG161

Hu Zehao, Ma Honghao, Liu Jun, Cheng Liu, Zhang Liqiang, Guo Pengcheng. Mechanical response and constitutive modeling of heat treated 22MnB5 steel[J]. Heat Treatment of Metals, 2021, 46(12): 193-198.

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