摘要
研究了热处理对3种Ti-Al-Sn-Zr-Mo-Si-X(X为ⅤB,ⅥB族一种或几种元素)系合金(A、B、C)室温拉伸性能的影响,对优化合金的热处理制度及优选热处理制度下3种合金的疲劳裂纹扩展行为也进行了探讨.结果表明,优选热处理制度下A、C合金的裂纹扩展速率差别不大,B合金560℃时效处理后,裂纹扩展速率比540℃时效处理的小.在相同热处理制度下,比较3种合金裂纹扩展速率的结果表明,lg△K在1.2～1.5 范围内B合金的抗疲劳裂纹扩展性能较优.
The effects of heat treatment on mechanical properties and crack propagation rate of Ti-Al-Sn-Zr-Mo-Si-X （ X belong to one or more kinds of ⅤB, ⅥB series elements） alloys were discussed. And the optimized heat treatment processes were confirmed. The results show that the effect of heat treatment on the crack propagation rate of alloy A and C is not obvious. The crack propagation rate of alloy B aging at 560℃ is better than that of aging at 540℃. Under the same heat treatment process,the alloy B is better than the others when lgAK is located from 1.2 to 1.5.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2005年第12期68-71,共4页
Heat Treatment of Metals
关键词
热处理
疲劳裂纹扩展速率
钛合金
heat treatment
fatigue crack propagation rate
titanium alloy
