Study on influence of strain ratio on low cycle fatigue behavior of directionally solidified superalloy DZ125

被引：0
|
作者：
Liu, Jin-Long [1 ]
Shi, Duo-Qi [1 ]
Yang, Xiao-Guang [1 ]
Bao, Yu [1 ]
Wang, Jing-Ke [1 ]
机构：
[1] School of Jet Propulsion, Beihang University, Beijing 100191, China
来源：
Cailiao Gongcheng/Journal of Materials Engineering | 2010年 / 12期
关键词：
Low-cycle fatigue - Nickel alloys;
D O I：
暂无
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学科分类号：
摘要：
The low cycle fatigue (LCF) behaviors of a directionally solidified nickel-based superalloy DZ125 at 850°C and 980°C were investigated. The effect of strain ratio (R=-1, 0) on the stress-strain hysteresis loop, cyclic mean stress evolution and fatigue lives was analyzed. The results indicated that the scatter of fatigue life for R=-1 and R=0 was small enough to be neglected at 850°C and 980°C. The fracture cross section was observed using scan electronic microscopic (SEM) to analyze the crack initiation mechanism.
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页码：47 / 50
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