摘要
研究Ti-15-3合金冷轧板晶界特征及其对疲劳滑移带萌生和短裂纹扩展的影响。结果表明:Ti-15-3合金冷轧板中晶界大多为大角度晶界,小角度晶界很少。在本文统计范围内,相邻晶粒取向差在40°～60°的范围内超过60%,小于15°的只占4%;大角度晶界有利于疲劳滑移带的萌生,对短裂纹穿越有阻碍作用,在小角晶界附近未发现有滑移带产生,但短裂纹很容易穿过小角度晶界。
The grain boundary characterization and its influence on the fatigue sliding band initiation and short crack propagation in Ti-15-3 sheet were studied. The results show that most of the grain boundaries belong to the large-angle grain boundary, less of them belong to the small-angle grain boundary. In the present statistic scope, the adjacent grains with misoritation angle of 40°-60° are over 60%, the adjacent grains with misoritation angle less 15° are about 4%. The fatigue sliding band preferres to initiate near the large-angle grain boundary, which shows the barrier effect on the short crack propagation. And no sliding band is found near the small-angle grain boundary, but the fatigue short crack propagates across easily these small-angle grain boundaries.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第B10期429-432,共4页
The Chinese Journal of Nonferrous Metals
基金
国家重点基础研究发展计划资助项目(2005CB623707)
高等学校学科创新引智计划资助项目(B07015)
辽宁省自然科学基金资助项目(20082036)
关键词
Ti153合金
冷轧板
晶界
滑移带
疲劳短裂纹
Ti-15-3 alloy
cold-rolled sheet
grain boundary
sliding band
fatigue short crack
