| Mechanical Properties and Microstructure of Extruded 2198 Al-Li Alloy Bars | |
| Zhao, Tian-zhang1; Fan, Zhi-xian1; Peng, Hao-yun2; Chen, Hong-ran1; Zhang, Shi-hong3 | |
| 通讯作者 | Zhao, Tian-zhang(137411635@qq.com) |
| 2023-05-24 | |
| 发表期刊 | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
 |
| ISSN | 1059-9495 |
| 页码 | 7 |
| 摘要 | Al-Li alloy is widely used in aircraft manufacturing due to its high specific strength. The micro-strengthening mechanisms have been investigated widely, including precipitate and solute strengthening. However, the influence of crystallographic texture on mechanical properties remains unclear, because current researches are based on rolled sheet. In this paper, 2198 Al-Li alloy bars were processed using hot extrusion to obtain a texture different from rolling. The mechanical properties were tested via uniaxial tension. The microstructure was observed using scanning electron microscopy, electron backscattered diffraction, and transmission electron microscopy. The results show that the yielding strength and ultimate tensile strength (UTS) of extruded 2198 Al-Li alloy bars are greatly improved due to the precipitation of T-1 precipitate after artificial aging. With the increasing of pre-deformation, the number of T-1 increases, and the size of T-1 precipitate is close to each other, leading to a remarkable increase in strength. When the pre-deformation is 6%, the UTS reaches 611 MPa. 2198 Al-Li alloy bars possess two types of fiber textures: // extrusion direction and // extrusion direction. The presence of fibrous texture with a low Schmid factor can increase the strength of extruded 2198 Al-Li alloy bars. The fracture mechanism of the bar is ductile fracture after artificial aging, while the fracture mechanism is a mix of micropore aggregation and cleavage after natural aging. |
| 关键词 | Al-Li alloy crystallographic texture extrusion precipitation |
| 资助者 | National Natural Science Foundation of China ; Foundation of Liaoning Educational Committee ; Plan for Young and Middle-aged Innovators of Shenyang |
| DOI | 10.1007/s11665-023-08319-0 |
| 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 | Materials Science |
| WOS类目 | Materials Science, Multidisciplinary |
| WOS记录号 | WOS:000994122700006 |
| 出版者 | SPRINGER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/178073 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Zhao, Tian-zhang |
| 作者单位 | 1.Shenyang Aerosp Univ, Shenyang 110136, Peoples R China 2.AVIC Shenyang Aircraft Ind Grp Co Ltd, Shenyang 110034, 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,Peng, Hao-yun,et al. Mechanical Properties and Microstructure of Extruded 2198 Al-Li Alloy Bars[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2023:7. |
| APA | Zhao, Tian-zhang,Fan, Zhi-xian,Peng, Hao-yun,Chen, Hong-ran,&Zhang, Shi-hong.(2023).Mechanical Properties and Microstructure of Extruded 2198 Al-Li Alloy Bars.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,7. |
| MLA | Zhao, Tian-zhang,et al."Mechanical Properties and Microstructure of Extruded 2198 Al-Li Alloy Bars".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2023):7. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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