周蕾,史庆南,蔡晓兰,王军丽

• 1:昆明理工大学冶金与能源工程学院
• 2:昆明理工大学材料科学与工程学院
• 3:昆明理工大学分析测试中心

摘要(Abstract)：

采用背散射电子衍射(EBSD和透射电镜(TEM)研究了纯铜大变形异步累积叠轧与再结晶过程中的低重合位置点阵(ΣCSL)晶界演化过程。研究表明:纯铜在600℃长时间均匀化退火时,形成大量较长的平直共格Σ3晶界,并作为大角度晶界阻碍晶粒的异常长大;在随后的大变形异步累积叠轧中,随着晶粒转动,形变组织的形成,低ΣCSL晶界的逐渐减少;再结晶退火中形成大量超细孪晶,同时形成大量Σ3特殊晶界,并与高ΣCSL晶界反应,形成大量低ΣCSL晶界,Σ1小角度晶界迅速增多,阻断一般大角度晶界网络,表明Σ3晶界的反应是大变形+退火纯铜晶界特征分布(GBCD)的优化机制。

关键词(KeyWords)： 铜;异步累积叠轧;再结晶;重合位置点阵;晶界特征分布

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51064016);; 云南省重大项目(2014FC001);; 云南省高校金属粉体制备与设备开发科技创新团队支持计划资助(14051693)

作者(Author): 周蕾,史庆南,蔡晓兰,王军丽

DOI: 10.13289/j.issn.1009-6264.2017-0001

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