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FRICTION STIR WELDING AND LOW-TEMPERATURE SUPERPLASTICITY OF 7B04 Al SHEET
Yang Chao1,2; Wang Jijie2; Ma Zongyi1; Ni Dingrui1; Fu Mingjie3; Li Xiaohua3; Zeng Yuansong3
Corresponding AuthorNi Dingrui(drni@imrac.cn)
2015-12-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume51Issue:12Pages:1449-1456
AbstractAnnealed 7B04 Al sheets in thickness of 2 mm were subjected to friction stir welding (FSW) under three rotation rate and welding speed parameters of 1600 r/min, 200 mm/min; 800 r/min, 200 mm/min and 400 r/min, 400 mm/min, respectively. The effect of welding parameters on the tensile property and microstructure of the FSW joints were investigated, with more efforts focusing on the low-temperature superplasticity of the nugget zones (NZs). The results showed that FSW joints with high quality could be produced by controlling welding parameters, with a joint strength coefficient of 100% being obtained. Dynamic recrystallization took place in the NZs with fine and equiaxed grains generated. The grain size of the base material was about 300 mu m, while it was significantly decreased in the NZs with decreasing the rotation rate: about 2, 1 and 0.6 mu m for the above three samples, respectively. The fine grain structure of the NZs could facilitate their superplastic deformation. The NZs exhibited superplastic elongations ranged from 160% to 590% at 300 degrees C at strain rates of superplasticity of 790% was obtained at 350 C at the 1 x10(-3) and 3x10(-4) s(-1). The maximum superplasticity of 790% was obtained at 350 degrees C at strain rates of 1 x10(-3) s(-1). The ability to superplastic deformation in the NZs at 400 degrees C.
Keywordultra-high strength aluminium alloy friction stir welding superplasticity microstructure
Funding OrganizationNational Natural Science Foundation of China
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51331008]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000367770600004
PublisherSCIENCE PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/121471
Collection中国科学院金属研究所
Corresponding AuthorNi Dingrui
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Shenyang Aerosp Univ, Coll Mat Sci & Engn, Shenyang 110036, Peoples R China
3.Beijing Aeronaut Mfg Technol Res Inst, Met Forming Technol Dept, Beijing 100024, Peoples R China
Recommended Citation
GB/T 7714
Yang Chao,Wang Jijie,Ma Zongyi,et al. FRICTION STIR WELDING AND LOW-TEMPERATURE SUPERPLASTICITY OF 7B04 Al SHEET[J]. ACTA METALLURGICA SINICA,2015,51(12):1449-1456.
APA Yang Chao.,Wang Jijie.,Ma Zongyi.,Ni Dingrui.,Fu Mingjie.,...&Zeng Yuansong.(2015).FRICTION STIR WELDING AND LOW-TEMPERATURE SUPERPLASTICITY OF 7B04 Al SHEET.ACTA METALLURGICA SINICA,51(12),1449-1456.
MLA Yang Chao,et al."FRICTION STIR WELDING AND LOW-TEMPERATURE SUPERPLASTICITY OF 7B04 Al SHEET".ACTA METALLURGICA SINICA 51.12(2015):1449-1456.
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