Friction stir welding of 2060-T8 Al-Li alloy. Part I: Microstructure evolution mechanism and mechanical properties

doi:10.1016/j.matchar.2020.110524

CORC > 金属研究所 > 中国科学院金属研究所

	Friction stir welding of 2060-T8 Al-Li alloy. Part I: Microstructure evolution mechanism and mechanical properties
	Tao, Y.; Zhang, Z.; Yu, B. H.; Xue, P.; Ni, D. R.; Xiao, B. L.; Ma, Z. Y.
刊名	MATERIALS CHARACTERIZATION
	2020-10-01
卷号	168 页码:13
关键词	Friction stir welding Aluminum-Lithium alloys Precipitates Hardness Strength Fracture
ISSN号	1044-5803
DOI	10.1016/j.matchar.2020.110524
通讯作者	Zhang, Z.(zhangzhen@imr.ac.cn) ; Ma, Z. Y.(zyma@imr.ac.cn)
英文摘要	2 mm thick rolled 2060-T8 Al-Li alloy plates were subjected to friction stir welding (FSW) under rotation rates of 400-1200 rpm and welding speeds of 50-200 mm/min. In the nugget zone (NZ), FSW resulted in the dissolution of the precipitates and the formation of delta ' (Al3Zr) precipitates, as well as the formation of Guinier-Preston (GP) and Guinier-Preston-Bagaryatsky (GPB) zones except for at 400 rpm-200 mm/min. In the heat affected zone (HAZ), FSW led to the dissolution and coarsening of T1 (Al2CuLi) and S ' (Al2CuMg), and the subsequent formation of new theta ' (Al2Cu) and sigma (Al5Cu6Mg2) precipitates. The lowest hardness zones (LHZs) of the FSW joints were located at either the NZ or the HAZ under varied welding parameters. Different from the FSW joints of conventional precipitation-hardened aluminum alloys, the ultimate tensile strength of FSW 2060-T8 joints increased as the rotation rate increased from 400 to 800 rpm, but was unchanged with further increasing the rotation rate from 800 to 1200 rpm under a constant welding speed of 200 mm/min. On the other hand, the joint strength increased as the welding speed increased from 50 to 200 mm/min under a constant rotation rate of 1200 rpm. While the FSW joints fractured at the LHZs under 400 rpm-200 mm/min and 1200 rpm-50 mm/min, abnormal fracture at the thermo-mechanically affected zone (TMAZ) was observed 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:000571497800009
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/321006/140657]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Z.; Ma, Z. Y.
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 I: Microstructure evolution mechanism and mechanical properties[J]. MATERIALS CHARACTERIZATION,2020,168:13.
APA	Tao, Y..,Zhang, Z..,Yu, B. H..,Xue, P..,Ni, D. R..,...&Ma, Z. Y..(2020).Friction stir welding of 2060-T8 Al-Li alloy. Part I: Microstructure evolution mechanism and mechanical properties.MATERIALS CHARACTERIZATION,168,13.
MLA	Tao, Y.,et al."Friction stir welding of 2060-T8 Al-Li alloy. Part I: Microstructure evolution mechanism and mechanical properties".MATERIALS CHARACTERIZATION 168(2020):13.