Tensile behaviors and hetero-deformation-induced hardening mechanisms in medium entropy alloys with dual gradients of grain size and coherent nanoprecipitate
文献类型：期刊论文
| 作者 | Zhang ZH(张子晗) ; Wu XL(武晓雷); Yuan FP(袁福平)
|
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 205页码:13 |
| ISSN号 | 1044-5803 |
| 关键词 | High/medium entropy alloys Heterogeneous structures Gradient structure Precipitation hardening Strengthening Ductility |
| DOI | 10.1016/j.matchar.2023.113372 |
| 通讯作者 | Yuan, Fuping(fpyuan@lnm.imech.ac.cn) |
| 英文摘要 | Heterogeneous structures with dual gradients of grain size and coherent L12 nanoprecipitation have been designed and fabricated in a Co34.46Cr32.12Ni27.42Al3Ti3 medium entropy alloy. These heterogeneous structures with dual gradients show improved tensile properties over both the single grain-size gradient structure and the coarse grained structures with homogeneously distributed L12 nanoprecipitates. Hetero-deformation-induced hardening rate was observed to be higher and the strain hardening capacities at each depth were also found to be higher in the structures with dual gradients, as compared to the single grain-size gradient structure. Deformation twins and stacking faults were observed at both the topmost and center layers, while deformation bands at two directions were only found at the topmost layer after tensile deformation in the single grain-size gradient structure. Strong interactions between defects and coherent L12 nanoprecipitates can be observed at all depths after tensile deformation in the structures with dual gradients, resulting in strong precipitation hardening. While, stronger precipitation hardening was achieved at the topmost layer due to the higher volume fraction and smaller spacing of coherent L12 nanoprecipitates, which could delay the early necking trend at the topmost layer for better tensile ductility in the structures with dual gradients. |
| 分类号 | 一类 |
| WOS关键词 | SEVERE PLASTIC-DEFORMATION ; SHORT-RANGE ORDER ; STRENGTH ; DUCTILITY ; CRCONI ; STRESS ; STEEL |
| 资助项目 | NSFC[11988102] ; National Key R & D Program of China[2019YFA0209902] ; National Science Foundation of China[52192591] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001106434600001 |
| 资助机构 | NSFC ; National Key R & D Program of China ; National Science Foundation of China |
| 其他责任者 | Yuan, Fuping |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/93487]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang ZH,Wu XL,Yuan FP. Tensile behaviors and hetero-deformation-induced hardening mechanisms in medium entropy alloys with dual gradients of grain size and coherent nanoprecipitate[J]. MATERIALS CHARACTERIZATION,2023,205:13. |
| APA | 张子晗,武晓雷,&袁福平.(2023).Tensile behaviors and hetero-deformation-induced hardening mechanisms in medium entropy alloys with dual gradients of grain size and coherent nanoprecipitate.MATERIALS CHARACTERIZATION,205,13. |
| MLA | 张子晗,et al."Tensile behaviors and hetero-deformation-induced hardening mechanisms in medium entropy alloys with dual gradients of grain size and coherent nanoprecipitate".MATERIALS CHARACTERIZATION 205(2023):13. |
入库方式： OAI收割
来源：力学研究所
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