上海交通大学学报(英文版) ›› 2013, Vol. 18 ›› Issue (2): 186-189.doi: 10.1007/s12204-012-1295-8

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Polycrystalline Behavior Analysis of Extruded Magnesium Alloy AZ31

TANG Wei-qin (唐伟琴), HUANG Shi-yao (黄诗尧), ZHANG Shao-rui (张少睿), LI Da-yong (李大永), PENG Ying-hong* (彭颖红)   

  1. (School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • 出版日期:2013-04-30 发布日期:2013-05-10
  • 通讯作者: PENG Ying-hong (彭颖红) E-mail:yhpeng@sjtu.edu.cn

Polycrystalline Behavior Analysis of Extruded Magnesium Alloy AZ31

TANG Wei-qin (唐伟琴), HUANG Shi-yao (黄诗尧), ZHANG Shao-rui (张少睿), LI Da-yong (李大永), PENG Ying-hong* (彭颖红)   

  1. (School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Online:2013-04-30 Published:2013-05-10
  • Contact: PENG Ying-hong (彭颖红) E-mail:yhpeng@sjtu.edu.cn

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 {10ˉ12}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

Abstract: 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 {10ˉ12}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.

Key words: mechanical properties, microstructure, texture, crystal plasticity, twinning

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