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.
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