High-cycle fatigue behavior of nickel-base single crystal superalloy

被引：1
|
作者：
刘源
于金江
徐岩
孙晓峰
管恒荣
胡壮麒
机构：
[1] Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China
[2] Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China
来源：
Transactions of Nonferrous Metals Society of China | 2005年 / S3期
关键词：
single crystal superalloy; high-cycle fatigue; fatigue limit stress;
D O I：
暂无
中图分类号：
TG132.3 [特种热性质合金];
学科分类号：
080502 ;
摘要：
High-cycle rotating bending fatigue behavior of SRR99 nickel-base single crystal alloy at 700 and 900℃ was investigated. The fatigue strengths for 107 cycles are 350 and 335MPa at 700 and 900℃, respectively. The total fatigue life becomes shorter when the temperature increases regardless of the loading stress and frequency. With the number of cycles decreasing, the difference in fatigue strength at the two temperatures becomes smaller. Typical fatigue rupture process including crack initiation site, crack propagation region and final rupture region exhibits at 700℃. The fracture surface is basically characterized by cleavage rupture at 900℃.
引用
收藏
页码：57 / 60
页数：4
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