Fatigue crack propagation behavior of Ni-based superalloys after overloading at elevated temperatures

被引：9
作者：
Huang, Xinyue [1 ]
Wang, Liang [1 ]
Hu, Yunming [2 ]
Guo, Guangping [1 ]
Salmon, David [2 ]
Li, Ying [1 ]
Zhao, Wenxia [3 ]
机构：
[1] Beijing Inst Aeronaut Mat, Natl Key Lab Sci & Technol Adv High Temp Struct M, Beijing 100095, Peoples R China
[2] MTS Syst Corp, Eden Prairie, MN 55344 USA
[3] Beijing Inst Aeronaut Mat, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Beijing 100095, Peoples R China
来源：
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2016年 / 26卷 / 02期
关键词：
High temperature fatigue; Fatigue crack propagation rate; Overloading; Crack closure; Superalloys; GROWTH; ALLOY;
D O I：
10.1016/j.pnsc.2016.03.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fatigue crack propagation behavior of three superalloys subjected to a single overloading at elevated temperatures was investigated. The fatigue crack propagation rate FCPR versus stress intensity factor range data da/dN-Delta K were calculated using the two-point secant method. It was found that the crack growth rates of the investigated materials were retarded after overloading with an overload ratio R-OL = 1.6. The size of the plastic zone in the front of the crack tip and its relation to loading level were discussed. The overload retardation effects are attributed to crack closure. The fatigue damage in the plastic zone can also be a factor to explain the overload retardation. (C) 2016 Published by Chinese Materials Research Society.
引用
收藏
页码：197 / 203
页数：7
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