Ti-Al-Zr合金的氢致延迟断裂行为  

Hydrogen induced delayed fracture behavior of Ti-Al-Zr alloy

作　　者：曹建玲[1] 沈保罗[1] 高升吉[1] 蒋有荣[2] 何晓 

机构地区：[1]四川大学材料科学与工程学院,成都610065 [2]中国核动力研究设计院核燃料及材料国家重点实验室,成都610041 [3]成都飞机工业有限责任公司,成都610091

出　　处：《中国有色金属学报》2002年第z1期74-77,共4页The Chinese Journal of Nonferrous Metals

基　　金：核燃料及材料国家重点实验室基金资助项目

摘　　要：研究了含氢量为 11% (质量分数 )的一种Ti Al Zr合金在室温和 10 0℃时的氢致延迟断裂行为。结果表明该合金的裂纹扩展分两个阶段 :在第 1阶段中 ,裂纹扩展速率da/dt随着应力强度因子KⅠ 的增加而稍稍增加(室温下 )或者不变 (10 0℃时 ) ;在第 2阶段da/dt随KⅠ 增加而迅速增加 ,当KⅠ 达到KⅠH时 ,试样失稳断裂。室温和 10 0℃时的KⅠH分别为 5 8MPa/m3/2 和 6 1MPa/m3/2 。Hydrogen induced delayed fracture behavior of a Ti Al Zr alloy containing 11%(mass fraction) hydrogen at room temperature and 100?℃ was studied. The results show that the curves of crack propagation velocity vs stress intensity factor have typical two-stage characteristics. In the first stage, crack growth velocity(da/dt) does not increase significantly with stress intensity factor K Ⅰ. But in the second stage, (da/dt) increase rapidly with K Ⅰ increasing, and the specimen fractures when K Ⅰ extends to critical value K ⅠH . K ⅠH at room temperature and 100?℃ is about 58?MPa/m 3/2 and 61 ?MPa/m 3/2 respectively.

关 键 词：Ti-Al-Zr合金 氢致延迟断裂 力学性能 

分 类 号：TG035[金属学及工艺]