Fretting fatigue failure behavior of Nickel-based single crystal superalloy dovetail specimen in contact with powder metallurgy pads at high temperature

被引：30
作者：
Sun, Shouyi [1 ]
Li, Lei [1 ]
Yue, Zhufeng [1 ]
Yang, Weizhu [1 ,2 ]
He, Kun [1 ]
Li, Songwei [1 ]
机构：
[1] Northwestern Polytech Univ, Dept Engn Mech, Changan Campus,POB 16, Xian 710129, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Sch Aeronaut, Youyi Campus, Xian 710072, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2020年 / 142卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Nickel-based single crystal; Dovetail attachment; High temperature fretting fatigue; Fretting wear; LIFE PREDICTION; WEAR; PLASTICITY; EVOLUTION; DAMAGE; ORIENTATION; ASSEMBLIES; FIXTURE; ALLOY; SLIP;
D O I：
10.1016/j.triboint.2019.105986
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Fretting fatigue failure behavior of DD6 Nickel-based single crystal superalloy dovetail attachment at 600 degrees C has been investigated. The contact surface material is oxidized at high temperature and the oxides are compacted on the contact surface. The contact surface is delaminated and many pits are formed, which result in stress concentration near the wear pits and promote crack initiation. All the dovetail specimens fail at the contact leading edge area and along (111) [1 (1) over bar0] and ((1) over bar1 (1) over bar) [110] slip systems, which are resulted from the large resolved shear stress at the contact edge. Crystallographic plasticity finite element method is used to obtain the contact stress and strain, and the calculated maximum damage area agrees well with the experimental results.
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页数：13
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