Plastic Evolution Characterization for 304 Stainless Steel by CQN_Chen Model under the Proportional Loading

Xiang Gao; Songchen Wang; Zhongming Xu; Jia Zhou; Xinming Wan; Hasib Md Abu Rayhan; Yanshan Lou

doi:10.3390/ma16216828

Plastic Evolution Characterization for 304 Stainless Steel by CQN_Chen Model under the Proportional Loading

Materials (Basel). 2023 Oct 24;16(21):6828. doi: 10.3390/ma16216828.

Authors

Xiang Gao^{1

2}, Songchen Wang³, Zhongming Xu¹, Jia Zhou², Xinming Wan², Hasib Md Abu Rayhan³, Yanshan Lou³

Affiliations

¹ College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China.
² China Automotive Engineering Research Institute Co., Ltd., Chongqing 401122, China.
³ School of Mechanical Engineering, Xi'an Jiaotong University, 28 Xianning West Rd, Xi'an 710049, China.

Abstract

In this paper, the CQN_Chen function is used to characterize the plastic anisotropic evolution of 304 stainless steel (SS304). The uniaxial tensile tests along different loading directions are conducted to experimentally investigate the anisotropic hardening behavior for SS304. The experimental data indicates that the anisotropy of SS304 is weak. The convexity analysis is carried out by the geometry-inspired numerical convex analysis method for the CQN_Chen yield locus during plastic deformation. The Hill48, SY2009 and CQN functions are used as the comparison to evaluate the accuracy of the CQN_Chen function in characterizing plastic evolution. The predicted values are compared with the experimental data. The comparison demonstrates that the CQN_Chen function can accurately characterize anisotropic hardening behavior under uniaxial tension along distinct loading directions and equibiaxial tension. Simultaneously, the CQN_Chen model has the capacity to adjust the yield surface shape between uniaxial tension and equibiaxial tension. The CQN_Chen model is recommended to characterize plastic evolving behavior under uniaxial tension along different directions and equibiaxial tension.

Keywords: anisotropic hardening; convex; plastic evolution.

Grants and funding

This research was funded by the National Natural Science Foundation of China (Grant No. 52075423 and U2141214) and the Fundamental Research Funds for the Central Universities (Grant No. xtr012019004 and zrzd2017027).