+高级检索
AZ31镁合金挤压棒材变路径压缩的微观机理
作者:
作者单位:

1.沈阳航空航天大学 材料科学与工程学院;2.中国科学院 金属研究所

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金资助(项目号51174189)


Micro mechanism of the various path compression of the extruded AZ31 magnesium alloy rod
Author:
Affiliation:

1.Shenyang aerospace university;2.Shenyang Aerospace University;3.Institute of Metal Research Chinese Academy of Sciences

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    室温下,对AZ31镁合金挤压棒材分别进行两种变路径压缩变形,第一种为压缩方向为正交径向的两道次压缩,称为RD1-RD2压缩变形;第二种为压缩方向依次为挤压方向和的径向的两道次压缩变形,称为ED-RD1压缩变形,并对上述压缩过程中晶粒取向和力学性能的变化特征进行了分析。分析结果表明,压缩变形过程中大量{10-12}拉伸孪晶和{10-12}-{10-12}二次孪晶启动,不同的孪晶变体启动使晶粒中存在较多的交叉孪晶界,孪晶启动总体上遵循施密特定律。对于RD1-RD2压缩变形,两道应力应变曲线几乎相同,而对于ED-RD1压缩变形,第二道次压缩的应力应变曲线对应的应力值明显高于第一道次。

    Abstract:

    An experimental investigation was carried out to measure two types of various compression paths on the extruded AZ31 Mg alloy rod at room temperature. The first type is a two-stepped compression with vertical radial directions, which was named as RD1-RD2 compression. The second type is that the compression direction is subsequently extruding and radial directions, which was named as ED-RD1 compression. The variation on grains orientation and mechanical properties during above compressions were analyzed. The obtained results reveal that large amounts of {10-12} extension twins and {10-12}-{10-12} secondary twins activated during deformation. Besides, many crossed twin boundaries formed within grains caused by different twin variants activations. On the whole, twin activation obey the Schmid law. On one hand, for the RD1-RD2 compression, the stress-strain curves of the first and second compressions are almost identical. On the other hand, for the ED-RD1 compression, the stress values of the stress-strain curve of the second compression was significantly higher than that of the first compression.

    参考文献
    相似文献
    引证文献
引用本文

宋广胜,张健强,牛嘉维,张士宏. AZ31镁合金挤压棒材变路径压缩的微观机理[J].稀有金属材料与工程,2019,48(11):3563~3570.[songguangsheng, zhangjianqiang, niujiawei, zhangshihong. Micro mechanism of the various path compression of the extruded AZ31 magnesium alloy rod[J]. Rare Metal Materials and Engineering,2019,48(11):3563~3570.]
DOI:10.12442/j. issn.1002-185X.20180691

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2018-06-29
  • 最后修改日期:2018-07-26
  • 录用日期:2018-07-27
  • 在线发布日期: 2019-12-10
  • 出版日期: