Fatigue crack growth mechanisms in a forged IN 718 nickel-based superalloy

被引：0
|
作者：
Mercer, C [1 ]
Soboyejo, WO [1 ]
机构：
[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA
来源：
SUPERALLOYS 718, 625, 706 AND VARIOUS DERIVATIVES | 1996年
关键词：
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The results of an investigation of the mechanisms of fatigue crack propagation in a forged IN 718 nickel-based superalloy are reported. Fatigue deformation and fracture mechanisms are evaluated using transmission electron microscopy analysis of crack-tip regions and scanning electron microscopy studies of fracture surfaces. The effects of increasing stress intensity factor range on fatigue crack growth rates and fracture mechanisms are elucidated. The results presented are in good agreement with similar studies into the fatigue crack propagation behavior of both polycrystalline and single crystal nickel-based superalloys.
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页码：577 / 586
页数：10
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