Polycrystalline Behavior Analysis of Extruded Magnesium Alloy AZ31  

作　　者：唐伟琴 黄诗尧 张少睿 李大永 彭颖红 

机构地区：[1]School of Mechanical Engineering,Shanghai Jiaotong University

出　　处：《Journal of Shanghai Jiaotong university(Science)》2013年第2期186-189,共4页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China (No. 50821003);the National Basic Pre-Research Program of China (No. 2006CB708611);the Shanghai Science and Technology Projects(Nos. 07XD14016 and 10JC1407300);the Program for New Century Excellent Talents in University(No. NCET-07-0545)

摘　　要：Uniaxial tensile and compressive tests were performed at room temperature on extruded AZ31 Mg alloy specimens and distinct tensile-compressive anisotropy was detected. Deformed specimens were examined and the results indicate that the generation of {10ī 2} 10ī 1 twin is responsible for the mechanical anisotropy. A rate independent crystal plasticity model, which accounts for both slip and twinning, was developed for polycrystalline hexagonal close packed (HCP) materials. Model predictions for the stress-strain curves and texture evolution were in reasonable agreement with the experimental results. Specifically, the model captured the three stages of strain hardening for uniaxial-compression. By comparing stress-strain curves and texture evolution between model predictions and experimental measures, information about the dominant slip and twinning systems active at room temperature was deduced.Uniaxial tensile and compressive tests were performed at room temperature on extruded AZ31 Mg alloy specimens and distinct tensile-compressive anisotropy was detected. Deformed specimens were examined and the results indicate that the generation of {1012}（1011） twin is responsible for the mechanical anisotropy. A rate independent crystal plasticity model, which accounts for both slip and twinning, was developed for polycrystalline hexagonal close packed （HCP） materials. Model predictions for the stress-strain curves and texture evolution were in reasonable agreement with the experimental results. Specifically, the model captured the three stages of strain hardening for uniaxial-compression. By comparing stress-strain curves and texture evolution between model predictions and experimental measures, information about the dominant slip and twinning systems active at room temperature was deduced.

关 键 词：mechanical properties microstructure TEXTURE crystal plasticity TWINNING 

分 类 号：TG146.2[一般工业技术—材料科学与工程]