Anisotropic fatigue strength and status of crack initiation of Ti17 disk fabricated by through-transus-processed forging

被引：0
|
作者：
Chen, Wei [1 ,2 ,3 ]
Zeng, Weidong [1 ,2 ,3 ]
Xiao, Yunteng [1 ,2 ,3 ]
Xu, Jianwei [1 ,2 ,3 ]
机构：
[1] State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an,710072, China
[2] Defense Technologies Innovation Center of precision forging and ring rolling, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an,710072, China
[3] Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment, Northwestern Polytechnical University, Xi'an,710072, China
来源：
International Journal of Fatigue | 2024年 / 180卷
基金：
中国国家自然科学基金;
关键词：
Anisotropy - Crack initiation - Fabrication - Fatigue crack propagation - Fatigue testing - Grain boundaries - High resolution transmission electron microscopy - High-cycle fatigue - Titanium alloys;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The high-cycle fatigue tests were performed along axial direction (AD), radius direction (RD), and inclined direction (ID) of the Ti17 disk fabricated by the through-transus-processed forging. Especially, the elongated β grains exhibits a basket-weave microstructure feature with a wavy grain boundary α. The AD sample presents a minimum fatigue strength. Both the RD sample and ID sample exhibit a maximum and an approximate fatigue strength. The anisotropy of the fatigue strength is determined by the α lath tending to occur basal slip. Meanwhile, the {10 1¯ 2} extension twins are observed near the region of the fatigue crack initiation. Besides, the dislocation accumulates at the interface of the α/β phase through the analysis of the Kernal average misorientation and transmission electron microscopy, resulting in that it becomes preferential sites for the fatigue crack nucleation and early propagation. © 2023 Elsevier Ltd
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    Zeng, Weidong
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    Xu, Jianwei
    INTERNATIONAL JOURNAL OF FATIGUE, 2024, 180
  • [2] Fracture toughness anisotropy of Ti17 disk fabricated by through-transus-processed forging and the role of toughening mechanisms
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    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2023, 881
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