| Defect induced cracking and modeling of fatigue strength for an additively manufactured Ti-6Al-4V alloy in very high cycle fatigue regime | |
Chi, Weiqian1; Wang, Wenjing1; Li, Ying2 ; Xu, Wei2; Sun CQ(孙成奇)3,4
| |
| Corresponding Author | Wang, Wenjing([email protected]) ; Sun, Chengqi([email protected]) |
| Source Publication | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 2022-06-01 | |
| Volume | 119Pages:10 |
| ISSN | 0167-8442 |
| Abstract | Additively manufactured (AM) alloy usually inevitably contains defects during the manufacturing process or in service. Defect, as a harmful factor, could significantly reduce the fatigue performance of materials. This paper shows that the location and introduced form of defects play an important role in high cycle fatigue and very high cycle fatigue (VHCF) behavior of selective laser melting Ti-6Al-4V alloys. The S-N curve descends approximately linearly for internal defect induced failure. While for artificial surface defect induced failure, the S-N curve descends at first and then exhibits a plateau region feature. The competition of interior crack initiation with fine granular area feature is also observed in VHCF regime. The paper indicates that only the size or the stress in-tensity factor range of the defect is not an appropriate parameter for describing the effect of defect on fatigue crack initiation. Finally, the effect of artificial surface defect on high cycle fatigue and VHCF strength is modeled,& nbsp;i.e., the fatigue strength sigma, fatigue life N and defect size & nbsp;(sic)area(square(root of the projection area of defect & nbsp;& nbsp;perpendicular to principal stress direction) is expressed as sigma = {CNa((sic)area)(n,& nbsp;)& nbsp;N < N0 & nbsp;CN0a((sic)area)(n,& nbsp;)& nbsp;N >= N-0 & nbsp;& nbsp;where C, a and n are constants, and N-0 is the number of cycles at the knee point of the curve. |
| Keyword | Very high cycle fatigue Additively manufactured titanium alloy Defect Fatigue strength modeling |
| DOI | 10.1016/j.tafmec.2022.103380 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000798924600002 |
| WOS Keyword | DIRECT LASER DEPOSITION ; MECHANICAL-BEHAVIOR ; SURFACE-ROUGHNESS ; PERFORMANCE ; LIFE ; INITIATION ; PREDICTION ; INCLUSION ; ELECTRON ; GROWTH |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Funding Project | National Natural Sci-ence Foundation of China[91860112] ; National Natural Sci-ence Foundation of China[52075032] ; Science and Technology Research and Development Program of China State Railway Group Co., Ltd.[P2020J024] |
| Funding Organization | National Natural Sci-ence Foundation of China ; Science and Technology Research and Development Program of China State Railway Group Co., Ltd. |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Wang, Wenjing ; Sun, Chengqi |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89475 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Beijing Jiaotong Univ, Key Lab Vehicle Adv Mfg, Measuring & Control Technol, Minist Educ, Beijing 100044, Peoples R China; 2.Beijing Inst Aeronaut Mat, Aviat Key Lab Sci & Technol Aeronaut Mat Testing &, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Beijing 100095, Peoples R China; 3.Inst Mech, Chinese Acad Sci, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Chi, Weiqian,Wang, Wenjing,Li, Ying,et al. Defect induced cracking and modeling of fatigue strength for an additively manufactured Ti-6Al-4V alloy in very high cycle fatigue regime[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2022,119:10.Rp_Au:Wang, Wenjing, Sun, Chengqi |
| APA | Chi, Weiqian,Wang, Wenjing,Li, Ying,Xu, Wei,&孙成奇.(2022).Defect induced cracking and modeling of fatigue strength for an additively manufactured Ti-6Al-4V alloy in very high cycle fatigue regime.THEORETICAL AND APPLIED FRACTURE MECHANICS,119,10. |
| MLA | Chi, Weiqian,et al."Defect induced cracking and modeling of fatigue strength for an additively manufactured Ti-6Al-4V alloy in very high cycle fatigue regime".THEORETICAL AND APPLIED FRACTURE MECHANICS 119(2022):10. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2022FA322_2022_Def（13675KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment