Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys
文献类型：期刊论文
| 作者 | Qin, Shuang2 ; Yang, Muxin2; Jiang, Ping2; Yuan, Fuping1,2; Wu, Xiaolei1,2; Jiang P(姜萍); Wu XL(武晓雷); Yuan FP(袁福平); Yang MX(杨沐鑫); Tan S(覃双)
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| 刊名 | MATERIALS CHARACTERIZATION
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| 出版日期 | 2022-04-01 |
| 卷号 | 186页码:13 |
| ISSN号 | 1044-5803 |
| 关键词 | High-entropy alloys Heterogeneous structures Precipitates Strain hardening Strengthening Ductility |
| DOI | 10.1016/j.matchar.2022.111779 |
| 通讯作者 | Yuan, Fuping(fpyuan@lnm.imech.ac.cn) |
| 英文摘要 | Both heterogeneous grain structure and dual nanoprecipitates (B2 and L12) have been designed and obtained in a FCC-based Al0.5Cr0.9FeNi2.5V0.2 high entropy alloy (HEA). The volume fraction of B2 phase is nearly unchanged, while the average size and volume fraction for L12 particles become larger after aging, resulting in a more severe heterogeneity. The aged samples display a better synergy of strength and ductility than the corresponding unaged samples. The aged samples show a transient up-turn strain hardening behavior and a higher hardening rate as compared to the corresponding unaged samples. The hetero-deformation-induced hardening plays a more important role in the aged samples than in the unaged samples, producing higher density of geometrically necessary dislocations for better tensile properties. Orowan-type bowing hardening and shearing hardening mechanisms are observed for B2 and L12 nano-particles, respectively. The size and interspacing of B2 and L12 particles are at nanometer scale, which should be very effective on hardening and strengthening by accumulating dislocations at phase interfaces. A theoretical analysis based on dislocation strengthening, grain boundary strengthening, Orowan-type bowing strengthening of B2 nano-particles, shearing strengthening of L12 nanoparticles and strengthening of chemical short-range order has been found to provide well prediction on strength. |
| WOS关键词 | SHORT-RANGE ORDER ; STRAIN-GRADIENT PLASTICITY ; ULTRA-HIGH STRENGTH ; MECHANICAL-PROPERTIES ; LATTICE DISTORTION ; THERMAL-STABILITY ; DEFORMATION ; DUCTILITY ; CRCONI ; BEHAVIOR |
| 资助项目 | National Key R&D Program of China[2017YFA0204402] ; NSFC Basic Science Center Program[11988102] ; National Natural Science Foundation of China[11790293] ; National Natural Science Foundation of China[52192591] ; fellowship of China Post-doctoral Science Foundation[2021M703292] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000808907600001 |
| 资助机构 | National Key R&D Program of China ; NSFC Basic Science Center Program ; National Natural Science Foundation of China ; fellowship of China Post-doctoral Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/89654]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Yuan, Fuping |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Shuang,Yang, Muxin,Jiang, Ping,et al. Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys[J]. MATERIALS CHARACTERIZATION,2022,186:13. |
| APA | Qin, Shuang.,Yang, Muxin.,Jiang, Ping.,Yuan, Fuping.,Wu, Xiaolei.,...&覃双.(2022).Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys.MATERIALS CHARACTERIZATION,186,13. |
| MLA | Qin, Shuang,et al."Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys".MATERIALS CHARACTERIZATION 186(2022):13. |
入库方式： OAI收割
来源：力学研究所
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