Effect of α-phase morphology on low-cycle fatigue behavior of TC21 alloy

被引：58
|
作者：
Tan, Changsheng [1 ]
Li, Xiangli [1 ]
Sun, Qiaoyan [1 ]
Xiao, Lin [1 ]
Zhao, Yongqing [2 ]
Sun, Jun [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China
[2] Northwest Res Inst Nonferrous Met, Xian 710016, Shaanxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2015年 / 75卷
基金：
中国国家自然科学基金;
关键词：
Titanium alloy; Low-cycle fatigue; Cyclic stress response; Planar slip; Crack nucleation; TITANIUM-ALLOY; CRACK INITIATION; LAMELLAR MICROSTRUCTURE; DEFORMATION RESPONSE; FRACTURE; TENSILE; GROWTH; PROPAGATION; SURFACE;
D O I：
10.1016/j.ijfatigue.2015.01.010
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Low-cycle fatigue behavior of TC21 alloy with equiaxed alpha phase embedded in the beta transformed matrix (EM) and full lamellar alpha phase (LM) was investigated. The results show that the EM microstructure possesses higher strength, ductility and longer fatigue life than those of the LM one. Dislocation structures are straight dislocation lines in both EM and LM; however, more dislocation tangles and debris were observed in the a than in the beta phase. The planar slip predominates cyclic deformation in the alpha phase, and promotes strain concentration and crack initiation at a phase boundaries. (C) 2015 Elsevier Ltd. All rights reserved.
引用
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页码：1 / 9
页数：9
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