摘要
对铜材进行异步累积叠轧并退火处理,制备出了均匀稳定的超细晶铜材。采用背散射电子衍射位向成像显微分析(EBSD+OIM)及透射电镜对变形铜材退火过程的组织及取向进行了观察和分析。结果表明:铜材经过六道次异步叠轧,包含许多缺陷和亚结构;在220℃×35～55min退火,可以获得200～500nm的超细晶;各种取向晶粒并存,择优取向不明显;延伸率得到提高。
The uniform ultra-fine grained copper was prepared by asymmetrical accumulative rolling bonding（AARB） and anneal. Microstructure and orientation evolution of samples after AARB and subsequent anneal were investigated. The deformed and annealed states were characterized by electron back scatter diffraction （EBSD） orientation image microscopy （OIM） and TEM. It was shown that there are many defects and substructure in the copper which is processed by AARB for six passes. The ultra-fine grained copper with the grain size of 200-500nm is obtained when deformed copper is annealed at 220℃ for 35-55min. Grains with all kinds of orientations exist together and some special orientations is not obvious. Elongation rate of UFG-Copper is increased.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第11期5-8,共4页
Journal of Materials Engineering
基金
国家自然科学基金(50564005)
云南省自然科学基金重点项目(2003E003Z)
关键词
异步累积叠轧
铜
超细晶材料
退火
asymmetrical accumulative rolling bonding （AARB）
copper
ultra-fine grained material annealing
