贾志强,曾卫东,王凯旋.TC17钛合金片状组织球化演变及Burgers关系的缺失[J].稀有金属材料与工程,2017,46(10):2895~2899.[Zhiqiang Jia,Weidong Zeng,Kaixuan Wang.The microstructure evolution and the loss of Burgers orientation relationship during dynamic globularization for TC17 titanium alloy[J].Rare Metal Materials and Engineering,2017,46(10):2895~2899.]
TC17钛合金片状组织球化演变及Burgers关系的缺失
投稿时间:2015-08-04  修订日期:2015-09-28
中文关键词:  TC17钛合金  Burgers关系  显微组织  EBSD  小角度晶界  大角度晶界
基金项目:教育部博士点基金(20136102110034);新世纪优秀人才支持计划(NCET-07-0696)
中文摘要:
      采用EBSD技术研究了TC17钛合金片状组织在热变形过程中的球化演变规律,并对比分析了变形前后α相与β相间Burgers关系的变化。结果表明,热变形导致β相发生明显的动态再结晶。变形初期片状组织内部首先形成位错亚结构,随后在动态回复作用下形成小角度晶界;随着变形的增大,亚晶界转化为大角度晶界导致片状α的破裂;破碎α相的相界再通过扩散作用继续迁移,最终实现α相的球化。热变形在改变片状组织形貌和稳定性的同时,也破坏了片状组织中α相和β相间严格的Burgers关系,热变形过程中柱滑移和其他滑移系或孪晶系的启动,是造成α相与β相间严格Burgers关系破坏的根本原因。
The microstructure evolution and the loss of Burgers orientation relationship during dynamic globularization for TC17 titanium alloy
英文关键词:TC17 titanium alloy  Burgers orientation relationship  microstructure  EBSD  low-angle grain boundary  high-angle grain boundary
英文摘要:
      The microstructure evolution and the change of Burgers orientation relationship between α and β phase of TC17 titanium alloy with initial lamellar microstructure were analyzed and researched by EBSD. The results shown that dynamic recrystallization of β phase was occured during hot deformation process. Meanwhile, the dynamic globularization of α phase contained the formation of subboundary and the fragmentation of α phase. The fragmentized α phase was eventually transformed to globularized particle. Meanwhile, the strict Burgers orientation relationship between α and β phase was destroyed, which was due to the activation of prismatic slip system and othe slip or twin system.
作者单位E-mail
贾志强 西北工业大学凝固技术国家重点实验室 jzq19841102@163.com 
曾卫东 西北工业大学凝固技术国家重点实验室 zengwd@nwpu.edu.cn 
王凯旋 西北工业大学凝固技术国家重点实验室  
摘要点击次数: 218
全文下载次数: 21
查看全文  查看/发表评论  下载PDF阅读器
关闭