Bauschinger-Like Effect of AZ31 Magnesium Alloy Wide Sheet During the Straightening Process  

作　　者：Fangkun Ning Qichi Le Yonghui Jia Liang Chen 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2021年第9期1255-1264,共10页金属学报（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2016YFB0301104);the National Natural Science Foundation of China(No.51771043);the Programmer of Introducing Talents of Discipline Innovation to Universities 2.0(the 111 Project 2.0 of China,No.BP0719037)。

摘　　要：The Bauschinger-like effect, which showed up in the straightening process of the AZ31 magnesium alloy wide sheet, was investigated through the multi-pass discrete three-point bending–unloading–bending(BUB) experiments. The stress variable, anisotropy, and asymmetry of tension and compression on the straightening process were corresponding to the Bauschingerlike effect. The Bauschinger-like effect in the initial, intermediate, and end of the straightening process was dominated by the twinning, detwinning, and dislocation induced by pyramidal < c + a > slip, respectively. Also, they were responsible for the transformation of the Bauschinger stress parameter(BSP) and Bauschinger energy parameter(BEP). Later, the anisotropic nonlinear kinematic hardening model(ANK model) to describe the Bauschinger-like effect was optimized and simplified.

关 键 词：Bauschinger-like eff ect STRAIGHTENING Discrete experiments Anisotropic nonlinear kinematic hardening model(ANK model) 

分 类 号：TG146.22[一般工业技术—材料科学与工程]