Strengthening and Toughening Mechanisms of Precipitation-Hardened Fe53Mn15Ni15Cr10Al4Ti2C1 High-Entropy Alloy
文献类型：期刊论文
| 作者 | Sun Shijie1; Tian Yanzhong2; Zhang Zhefeng1 |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2022-01-11 |
| 卷号 | 58期号:1页码:54-66 |
| 关键词 | high-entropy alloy precipitation strengthening inhomogeneous microstructure strength ductility |
| ISSN号 | 0412-1961 |
| DOI | 10.11900/0412.1961.2021.00242 |
| 通讯作者 | Zhang Zhefeng(zhfzhang@imr.ac.cn) |
| 英文摘要 | There has been significant progress in the development of high-entropy alloys (HEAs) with unconventional compositions in the past decade to meet the demand from a wide variety of industries, such as automotive, shipbuilding, and aerospace. The fcc HEAs have attracted growing attention due to their superior mechanical and functional properties. However, these HEAs exhibit low or modest yield strength, limiting their potential industrial application. To enhance the strength of the fcc HEAs, materials researchers are exploring additional strengthening methods, such as grain refinement, solid solution strengthening, and precipitation strengthening. However, the strengthening approaches mentioned above suffer from the trade-off dilemma between strength and ductility. In this study, a new precipitation-hardened Fe53Mn15Ni15Cr10Al4Ti2C1 HEA was designed by adding Al, Ti, and C elements based on the fcc HEA. Then the HEA was treated utilizing heavy-deformation and various heat-treatment processes, tuning the microstructure and precipitate. The cold-rolled alloy microstructure presented rolling bands (including deformation twins) and a significant dislocation density. Furthermore, the HEA microstructure consists of rolling bands, high-density dislocations, and nanoscale precipitates following heat treatment at medium temperatures for an extended period. In particular, the HEA possessed a superior balance between strength and ductility, resulting from the significant precipitation strengthening effect of L1(2) precipitates that were coherent with the matrix in the microstructure as well as the improved strain-hardening ability due to the recovery of dislocations. The precipitation-hardened HEA with an inhomogeneous microstructure could be obtained through heat treatment at medium temperatures over long periods, which exhibited an excellent strength-ductility relationship. |
| 资助项目 | Fundamental Research Funds for the Central Universities[N180204015] ; Liaoning Revitalization Talents Program[XLYC1808027] ; Special Research Assistant Program of Chinese Academy of Sciences ; IMR Innovation Fund[2021-PY16] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000773693600005 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | Fundamental Research Funds for the Central Universities ; Liaoning Revitalization Talents Program ; Special Research Assistant Program of Chinese Academy of Sciences ; IMR Innovation Fund |
| 源URL | [http://ir.imr.ac.cn/handle/321006/173089]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang Zhefeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun Shijie,Tian Yanzhong,Zhang Zhefeng. Strengthening and Toughening Mechanisms of Precipitation-Hardened Fe53Mn15Ni15Cr10Al4Ti2C1 High-Entropy Alloy[J]. ACTA METALLURGICA SINICA,2022,58(1):54-66. |
| APA | Sun Shijie,Tian Yanzhong,&Zhang Zhefeng.(2022).Strengthening and Toughening Mechanisms of Precipitation-Hardened Fe53Mn15Ni15Cr10Al4Ti2C1 High-Entropy Alloy.ACTA METALLURGICA SINICA,58(1),54-66. |
| MLA | Sun Shijie,et al."Strengthening and Toughening Mechanisms of Precipitation-Hardened Fe53Mn15Ni15Cr10Al4Ti2C1 High-Entropy Alloy".ACTA METALLURGICA SINICA 58.1(2022):54-66. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。