Friction stir welding of 2060-T8 Al-Li alloy. Part II: Tensile fracture behavior

doi:10.1016/j.matchar.2020.110507

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	Friction stir welding of 2060-T8 Al-Li alloy. Part II: Tensile fracture behavior
	Tao, Y.; Zhang, Z.; Yu, B. H.; Xue, P.; Ni, D. R.; Xiao, B. L.
刊名	MATERIALS CHARACTERIZATION
	2020-10-01
卷号	168 页码:11
关键词	Friction stir welding Aluminum-lithium alloys Microstrucrure Microtexture Hardness Fracture behavior
ISSN号	1044-5803
DOI	10.1016/j.matchar.2020.110507
通讯作者	Zhang, Z.(zhangzhen@imr.ac.cn)
英文摘要	For friction stir welded (FSW) joints of conventional precipitation-hardened aluminum alloys, the lowest hardness zone (LHZ) was located at heat affected zone (HAZ) and determined the tensile fracture behavior with the fracture occurring at the LHZ. For FSW 2060-T8 joints, however, the LHZs were located at the nugget zone (NZ) under 400 rpm-200 mm/min, but at the HAZ under 800 rpm-200 mm/min, 1200 rpm-200 mm/min and 1200 rpm-50 mm/min. While the FSW 2060-T8 joints normally fractured along the LHZ under 400 rpm-200 mm/min and 1200 rpm-50 mm/min, abnormal fracture occurred at the thermo-mechanically affected zone (TMAZ) under 800 rpm-200 mm/min and 1200 rpm-200 mm/min. The FSW 2060-T8 joints with 800 rpm-200 mm/min and 1200 rpm-200 mm/min presented obvious diversity of crystal orientation and grain morphology, and subsequent deformation in the LHZs, the lower TMAZ and upper TMAZ. The large Schmid factor, coarse grains and delta'/beta' precipitates caused the preferential deformation and planar slip at the lower TMAZ, weakened the mechanical properties of the TMAZ, and therefore resulted in the abnormal failure at the TMAZ of FSW 2060-T8 joints under 800 rpm-200 mm/min and 1200 rpm-200 mm/min.
资助项目	National Natural Science Foundation of China[U1760201]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000571731500005
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140681]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Z.
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Tao, Y.,Zhang, Z.,Yu, B. H.,et al. Friction stir welding of 2060-T8 Al-Li alloy. Part II: Tensile fracture behavior[J]. MATERIALS CHARACTERIZATION,2020,168:11.
APA	Tao, Y.,Zhang, Z.,Yu, B. H.,Xue, P.,Ni, D. R.,&Xiao, B. L..(2020).Friction stir welding of 2060-T8 Al-Li alloy. Part II: Tensile fracture behavior.MATERIALS CHARACTERIZATION,168,11.
MLA	Tao, Y.,et al."Friction stir welding of 2060-T8 Al-Li alloy. Part II: Tensile fracture behavior".MATERIALS CHARACTERIZATION 168(2020):11.