Study of the ductility enhancement of 5A90 Al-Mg-Li alloy sheets with stress relaxation
文献类型：期刊论文
| 作者 | Xia, Liangliang1,2; Zhang, Shi-Hong1; Xu, Yong1; Chen, Shuaifeng1; Abd El-Aty, Ali3; Pokrovsky, Artur, I4; Bakinovskaya, Alina A.4 |
| 刊名 | PHILOSOPHICAL MAGAZINE
 |
| 出版日期 | 2021-09-09 |
| 页码 | 24 |
| 关键词 | Dislocations mechanical properties Al-Mg-Li alloy stress relaxation in-situ XRD EBSD |
| ISSN号 | 1478-6435 |
| DOI | 10.1080/14786435.2021.1971316 |
| 通讯作者 | Xu, Yong(yxu@imr.ac.cn) |
| 英文摘要 | Stress relaxation tests were conducted on 5A90 (Al-Mg-Li) sheets using in-plane tension along various loading directions with different pre-strain levels to investigate the effects of stress relaxation on the mechanical properties. It is found that considerable ductility enhancement is achieved via the proposed stress relaxation approach. To investigate the mechanisms of ductility enhancement, in-situ X-ray diffractometer (XRD) and electron backscatter diffraction (EBSD) were conducted. The evolution of statistically stored dislocation (SSD) density and geometrically necessary dislocation (GND) density was investigated. A decrease in GND and SSD densities is observed, which is driven by internal stress homogenization and annihilation of dislocations after stress relaxation. Such decrease in dislocation density allows the rearrangement of GNDs and SSDs, and therefore improves the ductility with possible shifts of the strain localization during subsequent reloading. Meanwhile, the ductility enhancement is found to be strongly dependent on loading direction, which is related to the distinctive Schmid factor distribution. For instance, for loading direction with more 'soft grains' (i.e. crystal orientation with high Schmid factors), only a slight increase of ductility was observed owing to a lower possibility of shifting strain localization caused by much larger proportion of soft grain boundaries. |
| 资助项目 | National Natural Science Foundation of China[51875548] ; Sichuan Science and Technology Program[2019YFSY0050] ; Sino-Belarus Inter-Governmental Science and Technology Cooperation project[CB02-01] ; Youth Innovation Promotion Association CAS[2019195] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000695992000001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 资助机构 | National Natural Science Foundation of China ; Sichuan Science and Technology Program ; Sino-Belarus Inter-Governmental Science and Technology Cooperation project ; Youth Innovation Promotion Association CAS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/166931]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Xu, Yong |
| 作者单位 | 1.Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei, Peoples R China 3.Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing, Peoples R China 4.Phys Tech Inst, Natl Acad Sci Belarus, Minsk, BELARUS |
| 推荐引用方式 GB/T 7714 | Xia, Liangliang,Zhang, Shi-Hong,Xu, Yong,et al. Study of the ductility enhancement of 5A90 Al-Mg-Li alloy sheets with stress relaxation[J]. PHILOSOPHICAL MAGAZINE,2021:24. |
| APA | Xia, Liangliang.,Zhang, Shi-Hong.,Xu, Yong.,Chen, Shuaifeng.,Abd El-Aty, Ali.,...&Bakinovskaya, Alina A..(2021).Study of the ductility enhancement of 5A90 Al-Mg-Li alloy sheets with stress relaxation.PHILOSOPHICAL MAGAZINE,24. |
| MLA | Xia, Liangliang,et al."Study of the ductility enhancement of 5A90 Al-Mg-Li alloy sheets with stress relaxation".PHILOSOPHICAL MAGAZINE (2021):24. |
入库方式： OAI收割
来源：金属研究所
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