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DOI | 10.1038/s41467-018-04915-0 |
Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy | |
Jo, Y. H.1; Jung, S.1; Choi, W. M.1; Sohn, S. S.1; Kim, H. S.1; Lee, B. J.1; Kim, N. J.2; Lee, S.1 | |
2017-06-12 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea |
英文摘要 | The excellent cryogenic tensile properties of the CrMnFeCoNi alloy are generally caused by deformation twinning, which is difficult to achieve at room temperature because of insufficient stress for twinning. Here, we induced twinning at room temperature to improve the cryogenic tensile properties of the CrMnFeCoNi alloy. Considering grain size effects on the critical stress for twinning, twins were readily formed in the coarse microstructure by cold rolling without grain refinement by hot rolling. These twins were retained by partial recrystallization and played an important role in improving strength, allowing yield strengths approaching 1GPa. The persistent elongation up to 46% as well as the tensile strength of 1.3 GPa are attributed to additional twinning in both recrystallized and non-recrystallization regions. Our results demonstrate that non-recrystallized grains, which are generally avoided in conventional alloys because of their deleterious effect on ductility, can be useful in achieving high-strength high-entropy alloys. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403065100001 |
WOS关键词 | MULTICOMPONENT ALLOYS ; MECHANICAL-PROPERTIES ; TENSILE PROPERTIES ; GRAIN-SIZE ; MICROSTRUCTURE ; STABILITY ; EVOLUTION ; ALUMINUM ; BEHAVIOR ; STEEL |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203882 |
专题 | 资源环境科学 |
作者单位 | 1.Pohang Univ Sci & Technol, Ctr High Entropy Alloys, Pohang 790784, South Korea; 2.Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Pohang 790784, South Korea |
推荐引用方式 GB/T 7714 | Jo, Y. H.,Jung, S.,Choi, W. M.,et al. Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy[J]. NATURE COMMUNICATIONS,2017,8. |
APA | Jo, Y. H..,Jung, S..,Choi, W. M..,Sohn, S. S..,Kim, H. S..,...&Lee, S..(2017).Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy.NATURE COMMUNICATIONS,8. |
MLA | Jo, Y. H.,et al."Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy".NATURE COMMUNICATIONS 8(2017). |
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