Anisotropic yielding stress of 2198 Al-Li alloy sheet and mechanisms

doi:10.1016/j.msea.2019.138572

CORC > 金属研究所 > 中国科学院金属研究所

	Anisotropic yielding stress of 2198 Al-Li alloy sheet and mechanisms
	Zhao Tian-Zhang 2; Jin Long 2; Xu Yong 1; Zhang Shi-Hong 1
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2020-01-13
卷号	771 页码:7
关键词	Al-Li alloy Anisotropy Crystallographic texture Precipitate strengthening
ISSN号	0921-5093
DOI	10.1016/j.msea.2019.138572
通讯作者	Zhao Tian-Zhang(tzzhao@alum.imr.ac.cn)
英文摘要	The anisotropic mechanical behaviors of 2198 Al-Li alloy sheet under different heat treatments, including new quenching, natural ageing and artificial ageing, were systematically assessed via uniaxial tensile tests in three different directions: rolling direction (RD), 45 degrees and transverse direction (TD). It's found that the anisotropy of yielding stress after quenching and natural ageing is similar, mainly owing to the same crystallographic texture. The delta' participate generated during natural ageing has no influence on the anisotropy but increases the strength homogeneously. By contrast, 2198 Al-Li alloy after artificial ageing exhibits a different anisotropy of the yielding stress due to the inhomogeneous distribution of T-1 participate on four different variants of {111} plane. It is mainly caused by the inhomogeneous activation of dislocation glide during the pre-deformation, which has been verified by the calculation result via the visco-plastic self-consistent model. A new factor, T, has been proposed to consider the contribution of T-1 on the anisotropic yielding stress. In addition, a new analytical model has been established to predict the anisotropic yielding stress of 2198 AL-Li alloy sheet under different heat treatments and with different pre-deformation, which agrees well with the experimental results.
资助项目	National Natural Science Foundation of China[:51605310] ; National Natural Science Foundation of China[51875548]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000503324700005
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/321006/136388]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhao Tian-Zhang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Shenyang Aerosp Univ, Shenyang 110136, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhao Tian-Zhang,Jin Long,Xu Yong,et al. Anisotropic yielding stress of 2198 Al-Li alloy sheet and mechanisms[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,771:7.
APA	Zhao Tian-Zhang,Jin Long,Xu Yong,&Zhang Shi-Hong.(2020).Anisotropic yielding stress of 2198 Al-Li alloy sheet and mechanisms.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,771,7.
MLA	Zhao Tian-Zhang,et al."Anisotropic yielding stress of 2198 Al-Li alloy sheet and mechanisms".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 771(2020):7.