| High-cycle fatigue and fracture behavior of double-side friction stir welded 6082Al ultra-thick plates | |
| Yang, C.1,2; Wang, B. B.1; Yu, B. H.1; Wu, L. H.1; Xue, P.1; Zhang, X. M.3; He, G. Z.3; Ni, D. R.1; Xiao, B. L.1; Wang, K. S.4; Ma, Z. Y.1 | |
| Corresponding Author | Xue, P.(pxue@imr.ac.cn) ; Ni, D. R.(drni@imr.ac.cn) |
| 2020-03-01 | |
| Source Publication | ENGINEERING FRACTURE MECHANICS
 |
| ISSN | 0013-7944 |
| Volume | 226Pages:11 |
| Abstract | For welded structures of precipitation-strengthened aluminum alloys, achieving sound joint with good fatigue property is not an easy task, especially for thick plates. In the present work, ultra-thick 6082Al-T4 alloy plates with 80 mm in thickness were double-side friction stir welded and heat-treated. The high cycle fatigue (HCF) property and fracture behavior of the joint were investigated using trisection specimens in thickness, and the key factors that affect the fracture behavior were addressed. High quality joint was achieved with the three-layered specimens fractured along the lowest hardness zone (LHZ) in the static tensile testing. Further, the fatigue life curves exhibited almost the same distribution tendency, and the same fatigue limit (110 MPa) and fatigue ratio (0.49) were achieved in the three-layered specimens. During fatigue testing, the middle and lower layers fractured along the LHZ, which was similar to those during the static tensile tests, while abnormal fracture occurred in the nugget zone (NZ) of the upper specimen. Further examination revealed that the residual stress in the NZ of the upper layer was tensile stress (+9 MPa) whereas it was compressive stress in the lower layer (-31 MPa). The tensile residual stress together with the external loaded cyclic tensile stress resulted in more serious fatigue damage in the upper layer and led to the abnormal fracture in the NZ. |
| Keyword | Ultra-thick aluminum alloy plate Double-side friction stir welding High-cycle fatigue Microstructure, mechanical properties Residual stress |
| Funding Organization | Youth Innovation Promotion Association of the Chinese Academy of Sciences ; National Natural Science Foundation of China |
| DOI | 10.1016/j.engfracmech.2020.106887 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017236] ; National Natural Science Foundation of China[U1760201] |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| WOS ID | WOS:000509727900016 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/137289 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xue, P.; Ni, D. R. |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.CRRC Changchun Railway Vehicles Co Ltd, Changchun 130062, Peoples R China 4.Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, C.,Wang, B. B.,Yu, B. H.,et al. High-cycle fatigue and fracture behavior of double-side friction stir welded 6082Al ultra-thick plates[J]. ENGINEERING FRACTURE MECHANICS,2020,226:11. |
| APA | Yang, C..,Wang, B. B..,Yu, B. H..,Wu, L. H..,Xue, P..,...&Ma, Z. Y..(2020).High-cycle fatigue and fracture behavior of double-side friction stir welded 6082Al ultra-thick plates.ENGINEERING FRACTURE MECHANICS,226,11. |
| MLA | Yang, C.,et al."High-cycle fatigue and fracture behavior of double-side friction stir welded 6082Al ultra-thick plates".ENGINEERING FRACTURE MECHANICS 226(2020):11. |
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