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Nugget Structure Evolution with Rotation Speed for High-Rotation-Speed Friction-Stir-Welded 6061 Aluminum Alloy
Zhang HJ(张会杰); Wang M(王敏); Zhu Z(朱智); Zhang X(张骁); Yu T(于涛); Wu ZQ(吴振强)
Department空间自动化技术研究室
Source PublicationJournal of Materials Engineering and Performance
ISSN1059-9495
2018
Volume27Issue:3Pages:1378-1386
Indexed BySCI ; EI
EI Accession number20180804815346
WOS IDWOS:000426701000049
Contribution Rank1
Funding OrganizationNational Natural Science Foundation of China ; Innovation Fund from Youth Innovation Promotion Association Chinese Academy of Sciences
KeywordHigh-rotation-speed Friction Stir Welding Macro- And Microstructure Nugget Zone Rotation Speed
AbstractHigh-rotation-speed friction stir welding (HRS-FSW) is a promising technique to reduce the welding loads during FSW and thus facilitates the application of FSW for in situ fabrication and repair. In this study, 6061 aluminum alloy was friction stir welded at high-rotation speeds ranging from 3000 to 7000 rpm at a fixed welding speed of 50 mm/min, and the effects of rotation speed on the nugget zone macro- and microstructures were investigated in detail in order to illuminate the process features. Temperature measurements during HRS-FSW indicated that the peak temperature did not increase consistently with rotation speed; instead, it dropped remarkably at 5000 rpm because of the lowering of material shear stress. The nugget size first increased with rotation speed until 5000 rpm and then decreased due to the change of the dominant tool/workpiece contact condition from sticking to sliding. At the rotation speed of 5000 rpm, where the weld material experienced weaker thermal effect and higher-strain-rate plastic deformation, the nugget exhibited relatively small grain size, large textural intensity, and high dislocation density. Consequently, the joint showed superior nugget hardness and simultaneously a slightly low tensile ductility.
Language英语
WOS SubjectMaterials Science, Multidisciplinary
WOS KeywordMECHANICAL-PROPERTIES ; TEMPER CONDITION ; MICROSTRUCTURE ; PARAMETERS ; JOINTS ; TOOL ; GENERATION ; SHOULDER ; STRESSES ; HARDNESS
WOS Research AreaMaterials Science
Funding ProjectNational Natural Science Foundation of China[51505471] ; Innovation Fund from Youth Innovation Promotion Association Chinese Academy of Sciences[2015162]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/21588
Collection空间自动化技术研究室
Corresponding AuthorZhang HJ(张会杰)
Affiliation1.School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei 066004, China
2.State Key Laboratory of Robotics, Shenyang Institute of Automation Chinese Academy of Sciences, Shenyang, Liaoning 110000, China
Recommended Citation
GB/T 7714
Zhang HJ,Wang M,Zhu Z,et al. Nugget Structure Evolution with Rotation Speed for High-Rotation-Speed Friction-Stir-Welded 6061 Aluminum Alloy[J]. Journal of Materials Engineering and Performance,2018,27(3):1378-1386.
APA Zhang HJ,Wang M,Zhu Z,Zhang X,Yu T,&Wu ZQ.(2018).Nugget Structure Evolution with Rotation Speed for High-Rotation-Speed Friction-Stir-Welded 6061 Aluminum Alloy.Journal of Materials Engineering and Performance,27(3),1378-1386.
MLA Zhang HJ,et al."Nugget Structure Evolution with Rotation Speed for High-Rotation-Speed Friction-Stir-Welded 6061 Aluminum Alloy".Journal of Materials Engineering and Performance 27.3(2018):1378-1386.
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