摘要
研究了粉末烧结Ti 2 2Al 2 7Nb合金 (原子分数 ,%)在不同热处理工艺条件下的热疲劳行为。结果表明 ,热处理状态下合金的热疲劳寿命得到了明显的提高。与烧结态相比 ,烧结后经 110 0℃固溶和 810℃时效处理后 ,合金中沿晶分布O相组织较为细小 ,热疲劳断裂抗力较高 ,可以使试样的热疲劳寿命提高近 3倍。
The thermal fatigue behavior of powder s intering Ti-22Al-27Nb alloy under differ ent heat treatment processes were resear ched.The results show that the thermal f atigue life of the alloy after heat trea tment is improved evidently.Compared wit h the one in the sintered state,the O-ph ase of the alloy in heat treatment state is finer,the thermal fatigue fracture resistance is higher and can be increase d near three times under the 1100℃ solut ion and ageing treatment after sintering .
出处
《金属热处理》
CAS
CSCD
北大核心
2003年第5期21-23,共3页
Heat Treatment of Metals
基金
国家教委回国人员基金资助项目
关键词
热处理
热疲劳
断裂
heat treatment
t hermal fatigue
fracture
