The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion
文献类型：期刊论文
| 作者 | Jiang, Fuqing2,3; Tang, Lei1; Ye, Hengqiang3; Yang, Zhiqing3 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2023-03-24 |
| 卷号 | 869页码:16 |
| 关键词 | Al-Zn-Mg-Cu alloy Laser powder bed fusion Grain refinement Microstructure Mechanical property |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2023.144819 |
| 通讯作者 | Yang, Zhiqing(yangzq34@yahoo.com) |
| 英文摘要 | In this study, a crack-free 7075 aluminum alloy composed of fine, randomly-oriented and equiaxed grains similar to 1 mu m in size was successfully prepared by laser powder bed fusion (L-PBF). TiH2 particles were introduced to achieve significant grain refinement, serving as a critical method to relieve the high residual stress and prohibit inherent hot cracking during L-PBF manufacturing. Multiscale microstructural characterizations were applied to reveal the mechanisms of grain refinement and elimination of hot cracking. On the one hand, in-situ produced L1(2)-structured Al3Ti particles stimulated heterogeneous nucleation of alpha-Al. On the other hand, Ti solute atoms played an important role in restricting grain growth during solidification. A conventional T6 treatment was conducted to modify the microstructures and mechanical properties of the alloy. E-Al18Mg3(Ti,Cr)(2) dispersoids were precipitated, playing a role in strengthening through pinning grain boundaries. Thanks to grain boundary strengthening and Orowan dislocation strengthening arising from eta' precipitates, Al3Ti particles and E dispersoids, the yield strength, ultimate tensile strength and elongation of T6 treated 7075-Ti alloy are 496 +/- 10.8 MPa, 537 +/- 7.6 MPa and 7.2 +/- 0.3 %, respectively. These findings provide a broader insight into the use of TiH2 to improve the microstructure and mechanical properties of L-PBF-fabricated high-strength aluminum alloy. |
| 资助项目 | National Natural Science Foundation of China[51971225] ; National Natural Science Foundation of China[51771202] ; Basic and Applied Basic Research Program of Guangdong Province[2021B0301030003] ; Basic and Applied Basic Research Program of Guangdong Province[X210141TL210] ; Institute of Metal Research, Chinese Academy of Sciences |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001018896400001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; Basic and Applied Basic Research Program of Guangdong Province ; Institute of Metal Research, Chinese Academy of Sciences |
| 源URL | [http://ir.imr.ac.cn/handle/321006/178546]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yang, Zhiqing |
| 作者单位 | 1.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China 2.Univ Sci & Technol China, Inst Met Res, Chinese Acad Sci, Sch Mat Sci & Engn,Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Ji Hua Lab, Foshan 528200, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Fuqing,Tang, Lei,Ye, Hengqiang,et al. The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,869:16. |
| APA | Jiang, Fuqing,Tang, Lei,Ye, Hengqiang,&Yang, Zhiqing.(2023).The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,869,16. |
| MLA | Jiang, Fuqing,et al."The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 869(2023):16. |
入库方式： OAI收割
来源：金属研究所
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