Strain-rate and temperature dependent optimum precipitation sizes for strengthening in medium-entropy alloys
文献类型：期刊论文
| 作者 | Yuan, Ziyi2,3 ; Chen, Cen3; Zhang, Xu1; Zhou, Lingling3; Wu, Xiaolei2,3; Yuan, Fuping2,3
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| 刊名 | INTERNATIONAL JOURNAL OF PLASTICITY
 |
| 出版日期 | 2025-04-01 |
| 卷号 | 187页码:19 |
| 关键词 | High/medium-entropy alloys Nanoprecipitates Strain rate effects Temperature effects Precipitation strengthening Geometrically necessary dislocations |
| ISSN号 | 0749-6419 |
| DOI | 10.1016/j.ijplas.2025.104268 |
| 通讯作者 | Chen, Cen(chencen@lnm.imech.ac.cn) ; Yuan, Fuping(fpyuan@lnm.imech.ac.cn) |
| 英文摘要 | The (FeCoNi)86Al7Ti7 medium-entropy alloy (MEA) with varying sizes and fixed volume fraction of coherent L12 precipitates was fabricated, and the effects of precipitation size on mechanical properties at varying strain rates and temperatures were investigated experimentally. An optimum precipitation size for precipitation strengthening can be always observed for the experimental curves under different strain rates and temperatures. The dominant precipitation mechanism under dynamic conditions is found to be transited from the dislocation-shearing mechanism to the Orowan dislocation-looping mechanism with increasing precipitation size. A novel theoretical model was developed to consider the effects of strain rate and temperature on the precipitation shearing strengthening and the Orowan looping strengthening. The predicted precipitation strengthening curves as a function of precipitation size by the newly-developed model are observed to be well consistent with the experimental results under different strain rates and temperatures. The optimum precipitation size for the strongest precipitation strengthening is found to be strain-rate and temperature dependent, and shift to higher values with increasing strain rate and decreasing temperature, as predicted by the theoretical model and validated by the experimental results. |
| WOS关键词 | SHORT-RANGE ORDER ; MECHANICAL BEHAVIORS ; GRADIENT PLASTICITY ; SHEAR LOCALIZATION ; DEFORMATION ; METALS ; EVOLUTION ; MODEL ; BAND |
| 资助项目 | Natural Science Foundation of China[52192591] ; Natural Science Foundation of China[52441409] ; NSFC Basic Science Center Program[11988102] ; National Key R & D Program of China[2019YFA0209902] |
| WOS研究方向 | Engineering ; Materials Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001437871100001 |
| 资助机构 | Natural Science Foundation of China ; NSFC Basic Science Center Program ; National Key R & D Program of China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/100196]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Chen, Cen; Yuan, Fuping |
| 作者单位 | 1.Southwest Jiaotong Univ, Sch Mech & Aerosp Engn, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu 610031, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15, North 4th Ring, West Rd, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Ziyi,Chen, Cen,Zhang, Xu,et al. Strain-rate and temperature dependent optimum precipitation sizes for strengthening in medium-entropy alloys[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2025,187:19. |
| APA | Yuan, Ziyi,Chen, Cen,Zhang, Xu,Zhou, Lingling,Wu, Xiaolei,&Yuan, Fuping.(2025).Strain-rate and temperature dependent optimum precipitation sizes for strengthening in medium-entropy alloys.INTERNATIONAL JOURNAL OF PLASTICITY,187,19. |
| MLA | Yuan, Ziyi,et al."Strain-rate and temperature dependent optimum precipitation sizes for strengthening in medium-entropy alloys".INTERNATIONAL JOURNAL OF PLASTICITY 187(2025):19. |
入库方式： OAI收割
来源：力学研究所
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