| Superior dynamic shear properties by structures with dual gradients in medium entropy alloys | |
Tan S(覃双) ; Yang MX(杨沐鑫); Jiang P(姜萍); Wang, Jian1; Wu XL(武晓雷); Zhou, Hao2; Yuan FP(袁福平)
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| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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| 2023-08-01 | |
| Volume | 153Pages:166-180 |
| ISSN | 1005-0302 |
| Abstract | Structures with single gradient and dual gradients have been designed and fabricated in an Al 0.5 Cr 0.9 FeNi 2.5 V 0.2 medium entropy alloy. Structures with dual gradients (with increasing grain size and a decreasing volume fraction of nanoprecipitates from the surface to the center) were observed to show much better dynamic shear properties compared to both structures with single grain size gradient and coarse grained structures with homogeneously distributed nanoprecipitates. Thus, the dual gradients have a synergetic strengthening/toughening effect as compared to the sole effect of a single gradient and the sole precipitation effect. Initiation of the adiabatic shear band (ASB) is delayed and propagation of ASB is slowed down in structures with dual gradients compared to structures with single gradients, resulting in better dynamic shear properties. A higher magnitude of strain gradient and higher density of geometrically necessary dislocations are induced in the structures with dual gradients, resulting in extra strain hardening. Higher density dislocations, stacking faults, and Lomer Cottrell locks can be accumulated by the interactions between these defects and B2/L1 2 precipitates, due to the higher volume fraction of nanoprecipitates in the surface layer of the structures with dual gradients, which could retard the early strain localization in the surface layer for better dynamic shear properties. (c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Medium entropy alloys Gradient structures Precipitates Strain hardening Dynamic properties Adiabatic shear band |
| DOI | 10.1016/j.jmst.2023.01.014 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000956100800001 |
| WOS Research Area | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science ; Metallurgy & Metallurgical Engineering |
| Funding Organization | National Natural Science Foundation of China [52192591, 12202459, 11790293] ; NSFC Basic Science Center Program [11988102] ; China Postdoctoral Science Foundation [2021M703292] |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Yuan, FP (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China. ; Yuan, FP (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91854 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Nanjing Univ Sci & Technol, Nano & Heterogeneous Mat Ctr, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China |
| Recommended Citation GB/T 7714 | Tan S,Yang MX,Jiang P,et al. Superior dynamic shear properties by structures with dual gradients in medium entropy alloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,153:166-180.Rp_Au:Yuan, FP (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China., Yuan, FP (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China. |
| APA | 覃双.,杨沐鑫.,姜萍.,Wang, Jian.,武晓雷.,...&袁福平.(2023).Superior dynamic shear properties by structures with dual gradients in medium entropy alloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,153,166-180. |
| MLA | 覃双,et al."Superior dynamic shear properties by structures with dual gradients in medium entropy alloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 153(2023):166-180. |
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| Jp2023Fa191.pdf（17013KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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