Multi-scale fatigue failure features of titanium alloys with equiaxed or bimodal microstructures from low-cycle to very-high-cycle loading numbers | |
Pan, Xiangnan1,2; Su, Hang1,3; Liu, Xiaolong1,4; Hong, Youshi1,2 | |
通讯作者 | Pan, Xiangnan(panxiangnan@lnm.imech.ac.cn) ; Hong, Youshi(hongys@imech.ac.cn) |
发表期刊 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING |
2024 | |
卷号 | 890页码:13 |
ISSN | 0921-5093 |
摘要 | Fatigue failure types and their characteristics of titanium alloys with equiaxed or bimodal microstructures were systematically studied in low-cycle, high-cycle and very-high-cycle regimes. Based on the fractography, there are multi-scale features closely related to the behavior of crack initiation and early growth in specific microstructure under different loading cycles. At macro-scale, the presence and location of crack initiation with a rough area (RA) are dominated by the external loads and the number of equiaxed alpha grains in local microstructure domain. At micro-scale, facets are the most prominent features as the mean stress and the failure life increase. There is a trade-off between facets and the granular RA surface in very-high-cycle fatigue (VHCF) under stress ratio R from a positive to a negative value. At nano-scale, due to numerous cyclic pressing, the microstructure underneath the fracture surface is refined to form nanograins and shaping the granules within RA region, which keeps a relatively high VHCF strength at R =-1. As mean stress increases, the fatigue resistance dramatically degrades in VHCF under R > 0, because the RA morphology changes from granules to facets. |
关键词 | Titanium alloy Very-high-cycle fatigue Crack initiation Crack growth threshold Facet Equiaxed or bimodal microstructure |
DOI | 10.1016/j.msea.2023.145906 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:001120792400001 |
关键词[WOS] | NON-METALLIC INCLUSIONS ; HIGH-STRENGTH STEELS ; CRACK INITIATION ; QUANTITATIVE-EVALUATION ; STRESS RATIO ; TI-6AL-4V ; BEHAVIOR ; MECHANISM ; PROPAGATION ; STATISTICS |
WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
WOS类目 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
资助项目 | National Natural Science Foundation of China[11932020] |
项目资助者 | National Natural Science Foundation of China |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/93626 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Pan, Xiangnan; Hong, Youshi |
作者单位 | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA 4.Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China |
推荐引用方式 GB/T 7714 | Pan, Xiangnan,Su, Hang,Liu, Xiaolong,et al. Multi-scale fatigue failure features of titanium alloys with equiaxed or bimodal microstructures from low-cycle to very-high-cycle loading numbers[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,890:13. |
APA | Pan, Xiangnan,Su, Hang,Liu, Xiaolong,&Hong, Youshi.(2024).Multi-scale fatigue failure features of titanium alloys with equiaxed or bimodal microstructures from low-cycle to very-high-cycle loading numbers.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,890,13. |
MLA | Pan, Xiangnan,et al."Multi-scale fatigue failure features of titanium alloys with equiaxed or bimodal microstructures from low-cycle to very-high-cycle loading numbers".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 890(2024):13. |
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