Comparative study of very high cycle tensile and torsional fatigue in TC17 titanium alloy

被引：29
|
作者：
Liu, Hanqing [1 ,2 ]
Wang, Haomin [3 ]
Huang, Zhiyong [1 ,2 ]
Wang, Qingyuan [1 ,2 ]
Chen, Qiang [4 ]
机构：
[1] Sichuan Univ, Minist Educ, Key Lab Energy Engn Safety & Disaster Mech, Chengdu 610065, Peoples R China
[2] Sichuan Univ, Failure Mech & Engn Disaster Prevent & Mitigat Ke, Chengdu 610065, Sichuan, Peoples R China
[3] Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China
[4] Kyushu Univ, Dept Mech Engn, Fukuoka 8190395, Japan
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2020年 / 139卷
基金：
中国国家自然科学基金;
关键词：
Tensile and torsional fatigue; Crack initiation driven force; Very high cycle fatigue; Short crack propagation; FIB; CRACK INITIATION; STRESS RATIO; BEHAVIOR; STEEL; MICROSTRUCTURE; FAILURES; GROWTH; LIFE; DEFORMATION; PROPAGATION;
D O I：
10.1016/j.ijfatigue.2020.105720
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Very high cycle tensile and torsional fatigue of TC17 titanium alloy with bimodal microstructure have been firstly and comparatively studied at the stress ratio of 0.1. Like the tensile cracks, torsional cracks were substantiated to nucleate from specimen surface or interior sites and presented in a fatigue life-dependent mode. Internal tensile and torsional fatigue cracks with faceted morphology were analyzed using focus ion beam and unraveled to initiate in modes II + III that driven by maximum shear stress. Particularly, short crack branching and deflection beneath the crack initiation rough area can be observed for torsional loading condition.
引用
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页数：10
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