Microstructure and mechanical properties of double-side friction stir welded 6082Al ultra-thick plates

doi:10.1016/j.jmst.2019.10.005

CORC > 金属研究所 > 中国科学院金属研究所

	Microstructure and mechanical properties of double-side friction stir welded 6082Al ultra-thick plates
	Yang, C.1,4; Zhang, J. F.4; Ma, G. N.4; Wu, L. H.4; Zhang, X. M.2; He, G. Z.2; Xue, P.4; Ni, D. R.4; Xiao, B. L.4; Wang, K. S.3
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2020-03-15
卷号	41 页码:105-116
关键词	Ultra-thick aluminum alloy plates Double-side friction stir welding Finite element model Microstructural inhomogeneity Mechanical properties
ISSN号	1005-0302
DOI	10.1016/j.jmst.2019.10.005
通讯作者	Xue, P.(pxue@imr.ac.cn) ; Ni, D. R.(drni@imr.ac.cn)
英文摘要	In the present work, 80 mm thick 6082Al alloy plates were successfully double-side welded by friction stir welding (FSW). The relationship between the microstructures and mechanical properties was built for the double-side FSW butt joint with more attention paid to the local characteristic zones. It was shown that a phenomenon of microstructural inhomogeneity existed in the nugget zone (NZ) through the thickness direction. The grain size presented an obvious gradient distribution from the top to the bottom for each single-pass weld, and the microhardness values decreased from both surfaces to the middle of the NZ. The lowest hardness zone (LHZ) exhibited a "hyperbolical"-shaped distribution extending to the middle of the NZ. Similar tensile properties were obtained in the three sliced specimens of the FSW joint, and the joint coefficient reached about 70% which achieved the same level as the conventional FSW Al alloy joints. Finite element modeling proved that the "hyperbolical"-shaped heat affected zone (HAZ) was beneficial to resisting the strain concentration in the middle layer specimen which helped to increase the tensile strength. Based on the analysis of the hardness contour map, tensile property and microstructural evolution of the joints, an Isothermal Softening Layer (ISL) model was proposed and established, which may have a helpful guidance for the optimization on the FSW of ultra-thick Al alloy plates. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017236] ; National Natural Science Foundation of China[U1760201]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000513986900012
资助机构	Youth Innovation Promotion Association of the Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/137611]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xue, P.; Ni, D. R.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.CRRC Changchun Railway Vehicles Co Ltd, Changchun 130062, Peoples R China 3.Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, C.,Zhang, J. F.,Ma, G. N.,et al. Microstructure and mechanical properties of double-side friction stir welded 6082Al ultra-thick plates[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,41:105-116.
APA	Yang, C..,Zhang, J. F..,Ma, G. N..,Wu, L. H..,Zhang, X. M..,...&Ma, Z. Y..(2020).Microstructure and mechanical properties of double-side friction stir welded 6082Al ultra-thick plates.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,41,105-116.
MLA	Yang, C.,et al."Microstructure and mechanical properties of double-side friction stir welded 6082Al ultra-thick plates".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 41(2020):105-116.