东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (2): 208-212.DOI: -

• 论著 • 上一篇    下一篇

DZ40M合金再结晶形核的唯象行为

赵阳;王磊;于腾;刘杨;   

  1. 东北大学材料各向异性与织构教育部重点实验室;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-02-15 发布日期:2013-06-22
  • 通讯作者: Zhao, Y.
  • 作者简介:-
  • 基金资助:
    国家重点基础研究发展计划项目(2006CB605005)

Phenomenological behavior of recrystallized nucleation in DZ40M alloy

Zhao, Yang (1); Wang, Lei (1); Yu, Teng (1); Liu, Yang (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-02-15 Published:2013-06-22
  • Contact: Zhao, Y.
  • About author:-
  • Supported by:
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摘要： 以DZ40M合金为研究对象,采用金相组织观察和EBSD晶粒取向分析技术,分析了DZ40M合金的再结晶形核位置与形核后的晶粒取向之间的关系.研究表明:DZ40M合金经压痕变形后,在退火过程中发生的再结晶晶粒主要在初生碳化物周围和枝晶间形核;初生碳化物处形核的再结晶晶粒主要位于〈112〉取向上,而枝晶间形核的再结晶晶粒为〈110〉取向.合金中的二次碳化物M23C6在晶界、亚晶界和位错上析出,能够阻碍再结晶核心的形成.当退火温度低于1423 K时,M23C6的析出数量较多,尺寸小且间距小,可以有效地抑制合金的再结晶形核,降低再结晶形核率.

关键词: 再结晶形核, DZ40M合金, EBSD(电子背散射衍射), 初生碳化物, 枝晶间

Abstract: The relationship between recrystallized nucleation location and grain orientation after nucleation in DZ40M alloy was investigated by SEM and EBSD. The results showed that after the deformation by indentation the recrystallized grains during annealing nucleate around the primary carbides and interdendritically in <112> orientation and <110> orientation, respectively. The formation of nucleus of recrystallization in DZ40M alloy could be prevented by the secondary carbides M23C6 precipitated at grain/subgrain boundaries and dislocation positions. When the annealing temperature is below 1423 K, the number of M23C6 precipitates increases with small size and spacing to restrain the recrystallized nucleation and decrease its rate.

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