Microstructure Evolution and Properties of Friction Stir Welding Joint for 6082-T6 Aluminum Alloy

doi:10.1590/1980-5373-MR-2018-0285

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Microstructure Evolution and Properties of Friction Stir Welding Joint for 6082-T6 Aluminum Alloy
	Zhang, Liangliang 1; Wang, Xijing 1,2
刊名	MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
	2018
卷号	21 期号:6
关键词	6082-T6 aluminum alloy friction stir welding dynamic recrystallization EBSD
ISSN号	1516-1439
DOI	10.1590/1980-5373-MR-2018-0285
英文摘要	To investigate the evolution of grain morphologies, grain boundary features, and dislocation structure in upper part of nugget zone during friction stir welding of 6082-T6 aluminum alloys, electron backscattered diffraction and transmission electron microscope techniques were employed. The results showed that the metal on retreating side of the weld zone produced thermoplastic deformation during the welding process. The substructure of the lamellar dislocation wall formed at retreating side. Motivated by the welding thermal cycle, geometric dynamic recrystallization occurred in the substructure of the lamellar grains, leading to the lamellar array of grains. Discontinuous dynamic recrystallization occurred in the lamellar grain, leading the grain to be arranged in a "necklace" form. Simultaneously, the coarse grain of base material was refined. Due to the inhomogenous distribution of stress during the welding process, the alternating presence of large grain and small grain regions on advancing side took place. During the process of welding joint tensile, the fracture results from dislocation piling-up at the Mg2Si interface in large grains with a (111)[110] orientation. Thus, the advancing side becomes the weakest part of the mechanical properties in the welding joint, the tensile strength of the joint was 275MPa with a break elongation of 6%.
资助项目	major national science and technology projects[2012ZX04008011]
WOS研究方向	Materials Science
语种	英语
出版者	UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS
WOS记录号	WOS:000442253300001
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32856]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	Wang, Xijing
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Liangliang,Wang, Xijing. Microstructure Evolution and Properties of Friction Stir Welding Joint for 6082-T6 Aluminum Alloy[J]. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS,2018,21(6).
APA	Zhang, Liangliang,&Wang, Xijing.(2018).Microstructure Evolution and Properties of Friction Stir Welding Joint for 6082-T6 Aluminum Alloy.MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS,21(6).
MLA	Zhang, Liangliang,et al."Microstructure Evolution and Properties of Friction Stir Welding Joint for 6082-T6 Aluminum Alloy".MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS 21.6(2018).