| Microstructural Evolution and Tensile Properties of Al0.3CoCrFeNi High-Entropy Alloy Associated with B2 Precipitates | |
| Wang, Xiaodi1; Zhang, Zhe1; Wang, Zhengbin2; Ren, Xuechong1 | |
| Corresponding Author | Wang, Xiaodi(wangxiaodi@ustb.edu.cn) ; Ren, Xuechong(xcren@ustb.edu.cn) |
| 2022-02-01 | |
| Source Publication | MATERIALS
 |
| Volume | 15Issue:3Pages:17 |
| Abstract | The room-temperature strength of Al0.3CoCrFeNi high-entropy alloys (HEAs) is relatively low owing to its intrinsic fcc structure. In the present study, the as-cast HEAs were subjected to cold rolling and subsequent annealing treatment (800, 900, and 1000 degrees C) to adjust the microstructures and tensile properties. This treatment process resulted in the partial recrystallization, full recrystallization, and grain coarsening with increasing the annealing temperature. It was found that the large and spherical B2 precipitates were generated in the recrystallized grain boundaries of three annealing states, while the small and elongated B2 precipitates were aligned along the deformation twins in the non-recrystallized region of the 800 degrees C-annealing state. The former B2 precipitates assisted in refining the recrystallized grains to quasi ultra-fine grain and fine grain regimes (with the grain sizes of ~0.9, ~2.2, and ~7.2 mu m). The tensile results indicated that the decreased annealing temperature induced the gradual strengthening of this alloy but also maintained the ductility at the high levels. The yield strength and ultimate tensile strength in 800 degrees C-annealed specimen were raised as high as ~870 and ~1060 MPa and the ductility was maintained at ~26%. The strengthening behavior derived from the heterogeneous microstructures consisting of quasi ultra-fine recrystallized grains, non-recrystallized grains, deformation twins, dislocations, and B2 precipitates. Current findings offer the guidance for designing the HEAs with good strength and ductility. |
| Keyword | high-entropy alloy microstructures tensile properties B2 precipitates strengthening |
| Funding Organization | Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China (NSFC) |
| DOI | 10.3390/ma15031215 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Fundamental Research Funds for the Central Universities[FRF-TP-19-011A1] ; National Natural Science Foundation of China (NSFC)[52101065] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000754402900001 |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/173439 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Xiaodi; Ren, Xuechong |
| Affiliation | 1.Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Xiaodi,Zhang, Zhe,Wang, Zhengbin,et al. Microstructural Evolution and Tensile Properties of Al0.3CoCrFeNi High-Entropy Alloy Associated with B2 Precipitates[J]. MATERIALS,2022,15(3):17. |
| APA | Wang, Xiaodi,Zhang, Zhe,Wang, Zhengbin,&Ren, Xuechong.(2022).Microstructural Evolution and Tensile Properties of Al0.3CoCrFeNi High-Entropy Alloy Associated with B2 Precipitates.MATERIALS,15(3),17. |
| MLA | Wang, Xiaodi,et al."Microstructural Evolution and Tensile Properties of Al0.3CoCrFeNi High-Entropy Alloy Associated with B2 Precipitates".MATERIALS 15.3(2022):17. |
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