Microstructure evolution and strengthening mechanisms of Al0.4CoCu0.6NiSix (x=0-0.2) high entropy alloys prepared by vacuum arc melting and copper injection fast solidification
文献类型：期刊论文
| 作者 | Chen, YX; Zhu, S; Wang, XM; Yang, BJ; Han, GF; Qiu, L; Zhu, S (reprint author), Natl Key Lab Remfg, Dujiakan 21, Beijing 100072, Peoples R China. |
| 刊名 | VACUUM
 |
| 出版日期 | 2018-04-01 |
| 卷号 | 150页码:84-95 |
| 关键词 | Stacking-fault Energy Tensile Properties Phase-stability Multicomponent Alloys Corrosion-resistance Principal Elements Solid-solution Thin-films Grain-size Behavior |
| ISSN号 | 0042-207X |
| 英文摘要 | The work prepared Al0.4CoCu0.6NiSix (x=0, 0.05, 0.1, 0.2) high entropy alloys by vacuum arc melting (M-x) and copper injection fast solidification (I-x), discussed the influence of trace Si and rapid cooling on the alloys' microstructures and mechanical properties, analyzed the alloys' strengthening mechanism and evaluated the proportion of different strengthening effects on the improved mechanical properties. The results showed that M-x had a fcc + L1(2) structure, but it transformed to fcc + L1(2) + minor bcc when x = 0.1 and 0.2. I-x had a fcc + L1(2) structure except I-0.2 (fcc + L1(2) + minor bcc). With the increase of silicon, M-x's hardness increased from 193 HV to 334 HV and I-x's hardness increased from 216 HV to 395 HV. M-0.2's yield strength increased to 588 MPa, which was 2 times than that of M-0, the fracture strength and plastic deformation were 3074 MPa, 40.5%. I-x's yield strength increased to 690 MPa, which was 2.3 times than that of M-0, the fracture strength and plastic deformation reached 3407 MPa, 33.1%. The alloys' strengthening mechanism was the formation of bcc phase, solid solution strengthening and fine grain strengthening. And the strengthening effect of bcc phase was greater than fine grain strengthening and the fine grain strengthening effect was greater than solid solution strengthening. (C) 2018 Elsevier Ltd. All rights reserved.; The work prepared Al0.4CoCu0.6NiSix (x=0, 0.05, 0.1, 0.2) high entropy alloys by vacuum arc melting (M-x) and copper injection fast solidification (I-x), discussed the influence of trace Si and rapid cooling on the alloys' microstructures and mechanical properties, analyzed the alloys' strengthening mechanism and evaluated the proportion of different strengthening effects on the improved mechanical properties. The results showed that M-x had a fcc + L1(2) structure, but it transformed to fcc + L1(2) + minor bcc when x = 0.1 and 0.2. I-x had a fcc + L1(2) structure except I-0.2 (fcc + L1(2) + minor bcc). With the increase of silicon, M-x's hardness increased from 193 HV to 334 HV and I-x's hardness increased from 216 HV to 395 HV. M-0.2's yield strength increased to 588 MPa, which was 2 times than that of M-0, the fracture strength and plastic deformation were 3074 MPa, 40.5%. I-x's yield strength increased to 690 MPa, which was 2.3 times than that of M-0, the fracture strength and plastic deformation reached 3407 MPa, 33.1%. The alloys' strengthening mechanism was the formation of bcc phase, solid solution strengthening and fine grain strengthening. And the strengthening effect of bcc phase was greater than fine grain strengthening and the fine grain strengthening effect was greater than solid solution strengthening. (C) 2018 Elsevier Ltd. All rights reserved. |
| 学科主题 | Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| 资助机构 | International S&T Cooperation Program of China [2015DFG51920]; National Natural Science Foundation of China [51775556, 51375493] |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79391]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhu, S (reprint author), Natl Key Lab Remfg, Dujiakan 21, Beijing 100072, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Chen, YX,Zhu, S,Wang, XM,et al. Microstructure evolution and strengthening mechanisms of Al0.4CoCu0.6NiSix (x=0-0.2) high entropy alloys prepared by vacuum arc melting and copper injection fast solidification[J]. VACUUM,2018,150:84-95. |
| APA | Chen, YX.,Zhu, S.,Wang, XM.,Yang, BJ.,Han, GF.,...&Zhu, S .(2018).Microstructure evolution and strengthening mechanisms of Al0.4CoCu0.6NiSix (x=0-0.2) high entropy alloys prepared by vacuum arc melting and copper injection fast solidification.VACUUM,150,84-95. |
| MLA | Chen, YX,et al."Microstructure evolution and strengthening mechanisms of Al0.4CoCu0.6NiSix (x=0-0.2) high entropy alloys prepared by vacuum arc melting and copper injection fast solidification".VACUUM 150(2018):84-95. |
入库方式： OAI收割
来源：金属研究所
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