Multi-scale fatigue failure features of titanium alloys with equiaxed or bimodal microstructures from low-cycle to very-high-cycle loading numbers

doi:10.1016/j.msea.2023.145906

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Multi-scale fatigue failure features of titanium alloys with equiaxed or bimodal microstructures from low-cycle to very-high-cycle loading numbers
	Pan, Xiangnan 3,4; Su, Hang 2,4; Liu, Xiaolong 1,4; Hong, Youshi 3,4
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2024
卷号	890 页码:13
关键词	Titanium alloy Very-high-cycle fatigue Crack initiation Crack growth threshold Facet Equiaxed or bimodal microstructure
ISSN号	0921-5093
DOI	10.1016/j.msea.2023.145906
通讯作者	Pan, Xiangnan(panxiangnan@lnm.imech.ac.cn) ; Hong, Youshi(hongys@imech.ac.cn)
英文摘要	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.
资助项目	National Natural Science Foundation of China[11932020]
WOS关键词	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
语种	英语
WOS记录号	WOS:001120792400001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93625]
专题	力学研究所_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.Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China 2.Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, 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.