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On the improved tensile strength and ductility of Mg-Sn-Zn-Mn alloy processed by aging prior to extrusion

机译:挤压前时效处理的Mg-Sn-Zn-Mn合金拉伸强度和塑性的提高

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摘要

This study investigated the influence of aging prior to extrusion(APE)on the tensile strength and ductility of as-extruded Mg-8.32Sn-1.85Zn-0.17Mn alloy.Results demonstrated that APE treatment dramatically increased the volume fraction of recrystallized grains,thereby decreasing the grain size of the as-extruded alloy.This phenomenon was primarily attributed to the particle-stimulated nucleation and pinning effect induced by large amounts of small Mg 2 Sn precipitates produced by the APE treatment and dynamic precipitation.The tensile yield strength increased from 242.4 MPa to 256.5 MPa after APE treatment.The improved tensile strength can be attributed to the enhanced grain boundary strengthening and precipitation strengthening.The ductility of the as-extruded alloy also markedly increased from 7.1%to 13.5%after the APE treatment.The improved ductility of APE alloy was attributed to the texture randomization,the activity of pyramidalslip and the suppressed formation of{10-11}contraction twins and coarse Mg 2 Sn phases.
机译:本研究研究了诸如挤出(APE)之前衰老对挤出的Mg-8.32Sn-1.85-1N-0.17mN合金的延伸强度和延展性的影响。结果表明APE治疗显着增加了重结晶颗粒的体积分数。减少用挤出合金的晶粒尺寸。该现象主要归因于通过APE处理和动态降水产生的大量小Mg 2 Sn沉淀物诱导的颗粒刺激的成核和循环效果。拉伸屈服强度从猿处理后242.4MPa至256.5MPa。改善的抗拉强度可归因于增强的晶界强化和降水强化。涂抹后,挤出合金的延展性也显着增加到APE治疗后的7.1%至13.5%。改善APE合金的延展性归因于纹理随机化,金字塔的活性滑动和抑制形成{10-11}续诱捕双胞胎和粗mg 2 sn阶段。

著录项

  • 来源
    《镁合金学报(英文)》 |2019年第004期|P.637-647|共11页
  • 作者单位

    College of Materials Science and Engineering Sichuan University of Science&Engineering Zigong 643000 ChinaMaterial Corrosion and Protection Key Laboratory of Sichuan province Zigong 643000 China;

    College of Materials Science and Engineering Sichuan University of Science&Engineering Zigong 643000 ChinaMaterial Corrosion and Protection Key Laboratory of Sichuan province Zigong 643000 China;

    College of Materials Science and Engineering Sichuan University of Science&Engineering Zigong 643000 ChinaMaterial Corrosion and Protection Key Laboratory of Sichuan province Zigong 643000 China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 金属学与热处理;
  • 关键词

    Mg-Sn based alloy; Aging prior to extrusion; Microstructure; Mechanical properties;

    机译:Mg-Sn基合金;挤压前时效;显微组织;力学性能;
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