Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloy
This study employs molecular dynamics simulation to investigate the influence of twin thickness on the mechanical properties and plastic deformation mechanisms for crystalline/amorphous dual-phase CoCrFeNiMn high-entropy alloy with varying amorphous layer thicknesses. The results revealed that for a...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424024293 |
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| author | Chen Wang Junjie Zhao Minrong An |
| author_facet | Chen Wang Junjie Zhao Minrong An |
| author_sort | Chen Wang |
| collection | DOAJ |
| description | This study employs molecular dynamics simulation to investigate the influence of twin thickness on the mechanical properties and plastic deformation mechanisms for crystalline/amorphous dual-phase CoCrFeNiMn high-entropy alloy with varying amorphous layer thicknesses. The results revealed that for a minor amorphous layer thickness (d) of 1 nm, increasing the twin thickness (h) decreased average flow stress and peak stress within the models. It can be attributed to the fact that at smaller h, twin boundaries effectively hinder dislocation motion. However, as h increases, dislocation storage near twin boundaries and subsequent large-scale FCC→HCP phase transformation become more robust, reducing stress. On the other hand, when d thickness increases to 7 nm, stable average flow stress is observed due to thicker shear band formation during plastic deformation. Regardless of whether d was 1 nm or 7 nm, an increase in twin thickness augmented the likelihood of FCC→HCP phase transformation. |
| format | Article |
| id | doaj-art-8aec4b61ba5c41f1bea18c6371a6601a |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-8aec4b61ba5c41f1bea18c6371a6601a2025-08-20T02:35:26ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01334981499110.1016/j.jmrt.2024.10.159Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloyChen Wang0Junjie Zhao1Minrong An2School of Materials Science and Engineering, Xian Shiyou University, Xi'an, 710065, Shaanxi, ChinaCollege of New Energy, Xian Shiyou University, Xi'an, 710065, Shaanxi, ChinaCollege of New Energy, Xian Shiyou University, Xi'an, 710065, Shaanxi, China; Corresponding author.This study employs molecular dynamics simulation to investigate the influence of twin thickness on the mechanical properties and plastic deformation mechanisms for crystalline/amorphous dual-phase CoCrFeNiMn high-entropy alloy with varying amorphous layer thicknesses. The results revealed that for a minor amorphous layer thickness (d) of 1 nm, increasing the twin thickness (h) decreased average flow stress and peak stress within the models. It can be attributed to the fact that at smaller h, twin boundaries effectively hinder dislocation motion. However, as h increases, dislocation storage near twin boundaries and subsequent large-scale FCC→HCP phase transformation become more robust, reducing stress. On the other hand, when d thickness increases to 7 nm, stable average flow stress is observed due to thicker shear band formation during plastic deformation. Regardless of whether d was 1 nm or 7 nm, an increase in twin thickness augmented the likelihood of FCC→HCP phase transformation.http://www.sciencedirect.com/science/article/pii/S2238785424024293CoCrFeNiMn high entropy alloyCrystalline-amorphous dual-phase structureTwinningDeformation mechanismPhase transformation |
| spellingShingle | Chen Wang Junjie Zhao Minrong An Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloy Journal of Materials Research and Technology CoCrFeNiMn high entropy alloy Crystalline-amorphous dual-phase structure Twinning Deformation mechanism Phase transformation |
| title | Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloy |
| title_full | Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloy |
| title_fullStr | Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloy |
| title_full_unstemmed | Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloy |
| title_short | Influence of twinning thickness on the mechanical properties of crystalline-amorphous dual-phase CoCrFeNiMn high entropy alloy |
| title_sort | influence of twinning thickness on the mechanical properties of crystalline amorphous dual phase cocrfenimn high entropy alloy |
| topic | CoCrFeNiMn high entropy alloy Crystalline-amorphous dual-phase structure Twinning Deformation mechanism Phase transformation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424024293 |
| work_keys_str_mv | AT chenwang influenceoftwinningthicknessonthemechanicalpropertiesofcrystallineamorphousdualphasecocrfenimnhighentropyalloy AT junjiezhao influenceoftwinningthicknessonthemechanicalpropertiesofcrystallineamorphousdualphasecocrfenimnhighentropyalloy AT minrongan influenceoftwinningthicknessonthemechanicalpropertiesofcrystallineamorphousdualphasecocrfenimnhighentropyalloy |