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

doi:10.1016/j.matchar.2020.110507

IMR OpenIR

	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.
通讯作者	Zhang, Z.(zhangzhen@imr.ac.cn)
	2020-10-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	168 页码:11
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.
关键词	Friction stir welding Aluminum-lithium alloys Microstrucrure Microtexture Hardness Fracture behavior
资助者	National Natural Science Foundation of China
DOI	10.1016/j.matchar.2020.110507
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U1760201]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:000571731500005
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/140682
专题	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.