?A new modeling framework for anisotropic yield strength of Al-Li alloy sheet with inhomogeneous plate-like T-1 precipitates
文献类型：期刊论文
| 作者 | Zhao, Tian-Zhang1; Fan, Zhi-Xian1; Xie, Hong-Zhi2; Chen, Hong-Ran1; Chen, Shuai-Feng3; Zhang, Shi-Hong3 |
| 刊名 | INTERNATIONAL JOURNAL OF PLASTICITY
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 157页码:20 |
| 关键词 | Al-Li alloy Mechanical anisotropy Plate-like precipitate VPSC modeling |
| ISSN号 | 0749-6419 |
| DOI | 10.1016/j.ijplas.2022.103396 |
| 通讯作者 | Zhao, Tian-Zhang(tzzhao@alum.imr.ac.cn) ; Chen, Shuai-Feng(chensf@imr.ac.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000862935800002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China ; Foundation of Liaoning Educational Committee ; Plan for Young and Middle-aged Innovators of Shenyang |
| 源URL | [http://ir.imr.ac.cn/handle/321006/175881]  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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