循环变形铜单晶体中宏观形变带形成机制研究的新进展  

New Research Progress in Formation Mechanism of Macro Deformation Bands in Cyclically Deformed Copper Single Crystals

作　　者：王中光[1] 李守新[1] 李小武[1] 

机构地区：[1]中国科学院金属研究所材料疲劳与断裂国家重点实验室

出　　处：《世界科技研究与发展》2000年第1期30-35,共6页World Sci-Tech R&D

基　　金：国家自然科学基金项目!(编号 :599710 58和 19392 30 0 - 4)和重点项目 (编号 :599310 2 0 )资助课题

摘　　要：:系统研究了循环变形铜单晶体中的宏观形变带的产生规律和特征以及相应的位错结构 ,并对其形成机制进行了综合探讨。结果表明 ,形变带的形成可能与循环加载中产生的晶体不可逆旋转和宏观应力状态密切相关。对于不同取向铜单晶体 。The characteristics and the corresponding dislocation structures of the deformation bands (DBs), formed in cyclically deformed copper single crystals, were summarized systematically. The formation mechanism of DBs was also explored. It was shown that the local irreversible rotation of crystal, which exists during symmetrical push-pull loading, and a favorable macroscopic state of stress may be responsible for the formation of deformation bands. The DBs, formed in cyclically deformed copper single crystals with various slip orientations, might correspond to quite different dislocation structures.

关 键 词：铜单晶体 循环形变 形变带 晶体旋转 位错结构 

分 类 号：O733[理学—晶体学]