铜双晶体的循环应力-应变响应  

CYCLIC STRESS-STRAIN RESPONSE OF COPPER BICRYSTALS

作　　者：张哲峰[1] 胡运明[1] 王中光[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,沈阳110015

出　　处：《力学进展》2000年第3期400-414,共15页Advances in Mechanics

基　　金：国家自然科学基金!(19392300-4和59701006);辽宁省博士启动基金资助项目

摘　　要：比较了铜单晶体和多晶体疲劳行为的异同，提出了研究双晶体疲劳行为的必要性．总结了具有不同晶体取向和晶界的铜双晶体的疲劳行为的最新进展．利用平行晶界铜双晶体的取向因子和晶界影响区，总结了在循环载荷作用下的晶界强化模型．分析了垂直晶界铜双晶体循环塑性变形行为的特点，讨论了组元晶体取向对垂直晶界铜双晶体循环应力－应变曲线的影响．提出了提高单晶体和双晶体疲劳强度的控制因素．TO investigate the difference in fatigue behavior between single- and poly-crystals, it is necessary to reveal the fatigue damage mechanism of bi-crystals. Recent research progress in fatigue behavior of copper bi-crystals with different component crystals and grain boundaries was summarized. A model of grain boundary strengthening in copper bicrystals with parallel grain boundaries induced by the cyclic deformation was proposed by using the concept of Schmid factor and the grain boundary affected zone. By analyzing the characteristics of plastic deformation in the copper bicrystals with a perpendicular grain boundary, the effect of component crystal orientations on their cyclic stress-strain curves was discussed. Finally, the factors affecting the fatigue strength of the copper single- and bi-crystals were summarized.

关 键 词：铜双晶体 晶界强化 循环应力-应变曲线 

分 类 号：TB390.1[一般工业技术—材料科学与工程] O614.121[理学—无机化学]