...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Formation of 60° (0110) boundaries between {1012} twin variants in deformation of a magnesium alloy
【24h】

Formation of 60° (0110) boundaries between {1012} twin variants in deformation of a magnesium alloy

机译：在镁合金变形中，{1012}孪生变体之间形成60°（0110）边界

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

Interrupted tensile testing along the normal direction of a rolled AZ31 magnesium plate was conducted at various strain levels from 6% to 15.5%. Prior to deformation the specimens were annealed for grains to coarsen such that multiple twin variants in one grain can be activated and interaction between variants can be better resolved. The grain structure and texture evolution were then examined via electron backscatter diffraction. The results reveal that multiple primary {10 (1) over bar2}(p) twin variants inside individual grains grow and impinge, forming profuse boundaries of 60 degrees(01 (1) over bar0) orientation relationship. These boundaries are close to {11 (2) over bar2}(11 (2) over bar(3) over bar) twin relationship, however, they are not formed by twin nucleation and are only a product of interaction between the primary twins. The morphology of these special boundaries are highly irregular. Atomistic simulations were performed to understand such interaction, and the results show that such 60 degrees 01 (1) over bar0 boundaries have limited mobility. Thus, a primary twin variant is able to grow at the expense of other primary twin variants. Our experimental results also show that {10 (1) over bar2} twinning is active throughout the deformation until the specimens are fractured. As the strain increases, secondary {10 (1) over bar2}(S) twins are activated inside the primary twins. As the strain further increases to near fracture, {10 (1) over bar1}(S) secondary twins are activated inside the primary twins, followed by activation of tertiary {10 (1) over bar2}(r) twins inside the {10 (1) over bar1}(S) secondary twins, a process known as {10 (1) over bar1}-{10 (1) over bar2} double twinning. The formation of irregular 60 degrees 01 (1) over bar0 boundaries and the sequential twinning at large strains shed new light on the twinning mechanism in Mg and other hexagonal close-packed metals.
机译：沿轧制AZ31镁板法线方向的间断拉伸试验在6％至15.5％的不同应变水平下进行。在变形之前，将样品退火以使晶粒粗化，以便可以激活一个晶粒中的多个孪生变体，并且可以更好地解决变体之间的相互作用。然后通过电子反向散射衍射检查晶粒结构和织构演变。结果表明，单个晶粒内部的多个主要{10（1）over bar2}（p）孪生变体生长并撞击，形成了60度（bar0）相对于bar0取向关系的大量边界。这些边界接近{bar2上的{11（2）}}（bar（3）上的bar）（11）（2）孪生关系，但是，它们不是由孪生核形成的，而只是初级孪生子之间相互作用的产物。这些特殊边界的形态高度不规则。进行了原子模拟以了解这种相互作用，结果表明，在bar0>边界上这样的60度<01（1）具有有限的迁移率。因此，初级双生子变体能够以其他初级双生子变体为代价生长。我们的实验结果还表明，{10（1）over bar2}孪晶在整个变形过程中一直活跃，直到试样断裂为止。随着应变的增加，次级{10（1）在bar2}（S）孪晶上被激活。随着应变进一步增加到接近断裂，在初级孪晶内部激活{10（1）在bar1}（S）上的次级孪生子，然后在{10内部分裂激活三级{10（1）在bar2}（r）孪生子上（1）在bar1}（S）次生双胞胎上，称为{10（1）在bar1}上的{10（1）在bar2}上的双胞胎。在bar0>边界上形成不规则的60度<01（1），并且在大应变下连续孪生为Mg和其他六方密堆积金属的孪生机理提供了新的思路。

著录项

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