中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The mechanism of internal fatigue-crack initiation and early growth in a titanium alloy with lamellar and equiaxed microstructure

文献类型:期刊论文

作者Pan XN(潘向南)5,6; Xu SW(徐守文)5,6; Qian GA(钱桂安)5,6; Alexander N3,4; Andrey S2; Thierry PL1; Hong YS(洪友士)5,6
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2020-08-14
卷号798页码:140110
ISSN号0921-5093
DOI10.1016/j.msea.2020.140110
英文摘要

Traditionally, equiaxed α grains rather than lamellar microstructure (LM) domains in titanium alloys are regarded as potential internal crack origins in high-cycle fatigue (HCF) and very-high-cycle fatigue (VHCF) regimes. Here, we found that the fatigue crack is prone to initiate from a large LM domain in a titanium alloy with the composition of LM and equiaxed microstructure (EM) of fine α grains. Then, the mechanisms of internal crack initiation and early growth for the cases of HCF and VHCF under stress ratio R = −1, 0.1 and 0.5 were addressed and a mechanism chart was constructed to illustrate the internal cracking behavior, especially showing that the numerous cyclic pressing process dominates the related microstructure evolution with grain size refinement and nanograin formation underneath the fracture surfaces in the region of crack initiation and early growth.

分类号一类
语种英语
源URL[http://dspace.imech.ac.cn/handle/311007/84717]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Hong YS(洪友士)
作者单位1.Arts et Metiers Institute of Technology, CNRS, Universite de Bordeaux, Bordeaux INP, INRAE, I2M Bordeaux, Esplanade des Arts et Metiers, Talence, 33405, France
2.Aviaregister, Air. Sheremetevo-1, PO Box 54, Moscow Reg, Chimkovskiy State, 141426, Russia
3.MAI – National Research University, 4 Volokolamskoe Hwy, A-80, GSP-3, Moscow, 125993, Russia
4.LEME, University Paris Ouest Nanterre La Defense, 50 rue de Serves, Ville-d’Avray, 92410, France
5.中国科学院大学
6.中国科学院力学研究所
推荐引用方式
GB/T 7714
Pan XN,Xu SW,Qian GA,et al. The mechanism of internal fatigue-crack initiation and early growth in a titanium alloy with lamellar and equiaxed microstructure[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,798:140110.
APA Pan XN.,Xu SW.,Qian GA.,Alexander N.,Andrey S.,...&Hong YS.(2020).The mechanism of internal fatigue-crack initiation and early growth in a titanium alloy with lamellar and equiaxed microstructure.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,798,140110.
MLA Pan XN,et al."The mechanism of internal fatigue-crack initiation and early growth in a titanium alloy with lamellar and equiaxed microstructure".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 798(2020):140110.

入库方式: OAI收割

来源:力学研究所

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