<span contenteditable="false" data-cke-magic-line="1" style="width: 695px; height: 0px; padding: 0px; margin: 0px; display: block; z-index: 9999; color: rgb(255,255,255); font-size: 0px; line-height: 0px; position: absolute; border-top: 1px dashed rgb(255,0,0); user-select: none; left:-2px; top: 64.2px;"> ?A new modeling framework for anisotropic yield strength of Al-Li alloy sheet with inhomogeneous plate-like T-1 precipitates

doi:10.1016/j.ijplas.2022.103396

IMR OpenIR

	?A new modeling framework for anisotropic yield strength of Al-Li alloy sheet with inhomogeneous plate-like T-1 precipitates
	Zhao, Tian-Zhang 1; Fan, Zhi-Xian 1; Xie, Hong-Zhi 2; Chen, Hong-Ran 1; Chen, Shuai-Feng 3; Zhang, Shi-Hong 3
通讯作者	Zhao, Tian-Zhang(tzzhao@alum.imr.ac.cn) ; Chen, Shuai-Feng(chensf@imr.ac.cn)
	2022-10-01
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY
ISSN	0749-6419
卷号	157 页码:20
摘要	The high strength of Al-Li alloy is mainly attributed to precipitates, which has attracted extensive investigations on precipitation dynamics and interaction with dislocations. However, the influence of plate-like T-1 precipitate on mechanical anisotropy is still not fully clarified, and an accurate corresponding modeling framework considering inhomogeneous distribution and various configurations of T-1 precipitate is also needed. Here, the evolution of mechanical anisotropies in 2198 Al-Li alloy sheets is systematically studied with different distributions and thicknesses of T-1 precipitates obtained via changing pre-deformation direction and artificial aging temperature. A new modeling framework based on visco-plasitic self consistant (VPSC) is proposed to predict the anisotropic yield strength under different processing conditions. The resistance of four variants of T-1 precipitates which form a 'T-1 precipitate forest' to dislocation movement is considered. According to the geometric relationship with slipping systems, T-1 precipitates can be divided into three types: type I is parallel to slipping plane, type II is parallel to slipping direction but not slipping plane, and type III has a certain angle to both slipping plane and direction. The critical resolved shear stress (CRSS) of each slipping system can be calculated using a linear mixture law considering volume fraction and shear strength of these three types. It is found that T-1 precipitate of type I plays an important role in the strengthening of 2198 Al-Li alloy sheet. The shear strengths of types I, II and III are determined to be 400 MPa, 8 MPa and 8 MPa, respectively, at artificial aging temperature of 155 degrees C, and reach 400 MPa, 40 MPa and 40 MPa due to the increased T-1 thickness when aging temperature increases to 162 degrees C. The calculated anisotropy of yield strength is in good agreement with experimental results. Furthermore, a reasonable correlation between slipping activation and T-1 precipitate is revealed. That is, the activation fractions of different slipping systems exhibit how the varying distribution and thickness of T-1 precipitate lead to different mechanical anisotropy of 2198 Al-Li alloy sheet.
关键词	Al-Li alloy Mechanical anisotropy Plate-like precipitate VPSC modeling
资助者	National Natural Science Foundation of China ; Foundation of Liaoning Educational Committee ; Plan for Young and Middle-aged Innovators of Shenyang
DOI	10.1016/j.ijplas.2022.103396
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51605310] ; Foundation of Liaoning Educational Committee[LJKZ0180] ; Plan for Young and Middle-aged Innovators of Shenyang[RC210422]
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000862935800002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
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/321006/175885
专题	中国科学院金属研究所
通讯作者	Zhao, Tian-Zhang; Chen, Shuai-Feng
作者单位	1.Shenyang Aerosp Univ, Shenyang, Peoples R China 2.Shenyang Aircraft Ind Co, Shenyang 110850, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Tian-Zhang,Fan, Zhi-Xian,Xie, Hong-Zhi,et al. ?A new modeling framework for anisotropic yield strength of Al-Li alloy sheet with inhomogeneous plate-like T-1 precipitates[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2022,157:20.
APA	Zhao, Tian-Zhang,Fan, Zhi-Xian,Xie, Hong-Zhi,Chen, Hong-Ran,Chen, Shuai-Feng,&Zhang, Shi-Hong.(2022). ?A new modeling framework for anisotropic yield strength of Al-Li alloy sheet with inhomogeneous plate-like T-1 precipitates.INTERNATIONAL JOURNAL OF PLASTICITY,157,20.
MLA	Zhao, Tian-Zhang,et al." ?A new modeling framework for anisotropic yield strength of Al-Li alloy sheet with inhomogeneous plate-like T-1 precipitates".INTERNATIONAL JOURNAL OF PLASTICITY 157(2022):20.