Effect of forging process on high cycle and very high cycle fatigue properties of TC4 titanium alloy under three-point bending

被引：16
|
作者：
Wang, Bohan [1 ]
Cheng, Li [1 ]
Cui, Wenbin [1 ]
Chen, Xuan [1 ]
Wang, Changkai [1 ]
Li, Dongchun [1 ]
机构：
[1] Air Force Engn Univ, Aeronaut Engn Coll, Xian 710038, Peoples R China
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2021年 / 44卷 / 08期
关键词：
bending fatigue; combined loading; fatigue crack initiation; fracture morphology; titanium alloy; very high cycle fatigue;
D O I：
10.1111/ffe.13476
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The ultrasonic fatigue tests under two three-point bending loading modes were carried out on TC4 specimens with the equiaxed, bimodal, and lamellar microstructure in the range of 10(5) to 10(9) cycles. The S-N curves with different shapes were obtained, and it was found that the crack initiation in very high cycle regime changed from surface to subsurface. The crack initiation mechanism with different microstructures was revealed by fracture analysis. The axial tension influence mechanism is that it changes the axial stress distribution on the specimen cross section and makes the crack origin migrate to the interior.
引用
收藏
页码：2054 / 2069
页数：16
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