Evaluation of elastic-viscoplastic self-consistent models for a rolled AZ31B magnesium alloy under monotonic loading along five different material orientations and free-end torsion  

作　　者：Xianyun Zhu Yuqian Wang Luiz Carneiro Huamiao Wang Yanyao Jiang 

机构地区：[1]Light Alloy Research Institute,Central South University,Changsha 410012,China [2]Department of Mechanical Engineering,University of Nevada,Reno,NV 89557,USA [3]College of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,China

出　　处：《Journal of Magnesium and Alloys》2023年第4期1264-1275,共12页镁合金学报（英文）

基　　金：supported by the U.S.National Science Foundation(CMMI-1762312);the support of China Scholarship Council(CSC).

摘　　要：Comprehensive experiments including monotonic tension and monotonic compression of specimens taken from a rolled AZ31B Mg thick plate along five different material orientations with respect to the rolled direction(RD),and free-end torsion of a tubular specimen machined along the thickness direction(ND)were conducted.The experimental results were used to evaluate an elastic-viscoplastic self-consistent model with the consideration of twinning and detwinning(EVPSC-TDT)on magnesium(Mg)alloys.The EVPSC-TDT model provides stress-strain curves and the hardening rates in close agreement with the experimental results of all the 11 loading cases.The model adequately predicts the textures after fracture of all the 11 loading cases and the evolutions of tension twins with increasing strains for tension in the ND,compression in the RD,and torsion along the ND.The Swift effect was observed in the experiment and was properly simulated by the model.

关 键 词：Magnesium alloy Crystal plasticity TWINNING Material orientation 

分 类 号：TG146.22[一般工业技术—材料科学与工程]