• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Anisotropic mechanical behavior and corresponding microstructure evolution of extruded AZ31 under combined normal/shear stress states
【24h】

Anisotropic mechanical behavior and corresponding microstructure evolution of extruded AZ31 under combined normal/shear stress states

机译：正常/剪切应力状态下挤压AZ31的各向异性力学行为及相应的组织演变

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to clarify the anisotropic mechanical behavior and corresponding microstructure evolution of extruded AZ31 Mg alloy under combined stress states, modified shear-tension specimens (STSs) and shear-compression specimens (SCSs) were specifically designed and tested by means of quasi-static uni-axial loading. The specimens with beveled opposed slots of different angles (0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees and 75 degrees) are used to obtain different tau/sigma(n) ratio (SN Ratio, tau/sigma(n)). With the SN Ratio increasing, different mechanical properties between STSs and SCSs are observed, i.e., equivalent yield strength and strain-hardening rate. These differences in deformation behavior are resulted from the activation stresses for twinning and slips. It is found that the deformation of extruded AZ31 Mg alloy under combined shear-tension stresses is dominated by the typical slips. In contrast, twinning dominates the deformation under combined shear-compression stresses. Noticeably, the ductility of extruded AZ31 could be effectively improved by a small shear (about half normal stress), because the prismatic slip is further activated under tau stress component and promotes the major deformation under sigma(n) stress based on microstructure and texture analysis. In addition, it is found that the fracture mechanism transformed from the micro-voids growth and coalescence to the internal voids shearing with the SN Ratio increasing from 0 to 3.732.
机译：为了阐明在复合应力状态下挤压成形的AZ31 Mg合金的各向异性力学行为和相应的组织演变，专门设计了改进的剪切拉伸试样（STSs）和剪切压缩试样（SCSs）并通过准静态uni测试。 -轴向载荷。使用具有不同角度（0度，15度，30度，45度，60度和75度）的相对斜槽的样品获得不同的tau / sigma（n）比（SN比，tau / sigma（n）） ）。随着SN比的增加，观察到STS和SCS之间的机械性能不同，即等效屈服强度和应变硬化率。变形行为的这些差异是由孪生和滑移的激活应力引起的。研究发现，挤压的AZ31 Mg合金在剪切应力联合作用下的变形主要由典型的滑动引起。相反，孪生支配了组合剪切压缩应力下的变形。值得注意的是，挤压的AZ31的延展性可以通过较小的剪切力（大约为正应力的一半）来有效地改善，因为基于微结构和织构分析，棱柱形滑移会在tau应力分量下进一步激活并促进sigma（n）应力下的主要变形。 。此外，随着SN比从0增加到3.732，发现断裂机制从微孔的生长和聚结转变为内部的孔隙剪切。

著录项

  • 来源
    《Materials Science and Engineering》 |2019年第8期|415-425|共11页
  • 作者

    Yang Baocheng; Dong Yuanpeng; Guo Dongxu; Yang Chong; Zhang Xiang; Peng Yan; Wu Lu; Shi Baodong;

  • 作者单位

    Yanshan Univ, Sch Mech Engn, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, Sch Mech Engn, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, Sch Mech Engn, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, Sch Mech Engn, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, Coll Vehicles & Energy, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, Sch Mech Engn, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China;

    Nucl Power Inst China, Subinst 1, Chengdu 610005, Sichuan, Peoples R China|Nucl Power Inst China, Natl Key Lab Nucl Fuel & Mat, Chengdu 610005, Sichuan, Peoples R China;

    Yanshan Univ, Sch Mech Engn, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China|Xi An Jiao Tong Univ, Sch Aerosp, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Shaanxi, Peoples R China|Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Combined normal/shear stresses; Plastic deformation; Prismatic slip; Basal texture; Magnesium alloy;

    机译：正/剪应力组合;塑性变形;棱柱滑移;基质;镁合金;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号