The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy Alloy
Phase separation phenomena in high-entropy alloys (HEAs) have attracted much attention since their discovery, but little attention has been given to the dynamics of the deformation mechanism of this kind of HEA during uniaxial tension, which limits their widespread and practical utility. In this wor...
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MDPI AG
2021-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/21/6523 |
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| author | Heling Liu Chuanxiao Peng Xuelian Li Shenghai Wang Li Wang |
| author_facet | Heling Liu Chuanxiao Peng Xuelian Li Shenghai Wang Li Wang |
| author_sort | Heling Liu |
| collection | DOAJ |
| description | Phase separation phenomena in high-entropy alloys (HEAs) have attracted much attention since their discovery, but little attention has been given to the dynamics of the deformation mechanism of this kind of HEA during uniaxial tension, which limits their widespread and practical utility. In this work, molecular dynamics simulation was used to study the effect of phase separation on the mechanical properties of an HEA under uniaxial tensile loading. Moreover, the associated deformation behavior of the Co–Cr–Cu–Fe–Ni HEA was investigated at the nanoscale. Models with Cu-rich grain boundaries or grains were constructed. The results showed that Cu-rich grain boundaries or grains lowered the strength of the Co–Cr–Cu–Fe–Ni HEA, and Cu-rich grain boundaries significantly reduced ductility. This change of mechanical properties was closely associated with a deformation behavior. Furthermore, the deformation behavior was affected by the critical resolved shear stress of Cu-rich and Cu-depleted regions and the uneven stress distribution caused by phase separation. In addition, dislocation slipping and grain boundary sliding were the main mechanisms of plastic deformation in the Co–Cr–Cu–Fe–Ni HEA. |
| first_indexed | 2024-03-10T05:57:47Z |
| format | Article |
| id | doaj.art-6b8233911762476eb63dceb24c21fdfc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:57:47Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6b8233911762476eb63dceb24c21fdfc2023-11-22T21:13:30ZengMDPI AGMaterials1996-19442021-10-011421652310.3390/ma14216523The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy AlloyHeling Liu0Chuanxiao Peng1Xuelian Li2Shenghai Wang3Li Wang4School of Mechanical, Electrical & Information Engineering, Shandong University (Weihai), Weihai 264209, ChinaSchool of Mechanical, Electrical & Information Engineering, Shandong University (Weihai), Weihai 264209, ChinaSchool of Mechanical, Electrical & Information Engineering, Shandong University (Weihai), Weihai 264209, ChinaSchool of Mechanical, Electrical & Information Engineering, Shandong University (Weihai), Weihai 264209, ChinaSchool of Mechanical, Electrical & Information Engineering, Shandong University (Weihai), Weihai 264209, ChinaPhase separation phenomena in high-entropy alloys (HEAs) have attracted much attention since their discovery, but little attention has been given to the dynamics of the deformation mechanism of this kind of HEA during uniaxial tension, which limits their widespread and practical utility. In this work, molecular dynamics simulation was used to study the effect of phase separation on the mechanical properties of an HEA under uniaxial tensile loading. Moreover, the associated deformation behavior of the Co–Cr–Cu–Fe–Ni HEA was investigated at the nanoscale. Models with Cu-rich grain boundaries or grains were constructed. The results showed that Cu-rich grain boundaries or grains lowered the strength of the Co–Cr–Cu–Fe–Ni HEA, and Cu-rich grain boundaries significantly reduced ductility. This change of mechanical properties was closely associated with a deformation behavior. Furthermore, the deformation behavior was affected by the critical resolved shear stress of Cu-rich and Cu-depleted regions and the uneven stress distribution caused by phase separation. In addition, dislocation slipping and grain boundary sliding were the main mechanisms of plastic deformation in the Co–Cr–Cu–Fe–Ni HEA.https://www.mdpi.com/1996-1944/14/21/6523high-entropy alloysphase separationmechanical behaviorsmolecular dynamics simulation |
| spellingShingle | Heling Liu Chuanxiao Peng Xuelian Li Shenghai Wang Li Wang The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy Alloy Materials high-entropy alloys phase separation mechanical behaviors molecular dynamics simulation |
| title | The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy Alloy |
| title_full | The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy Alloy |
| title_fullStr | The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy Alloy |
| title_full_unstemmed | The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy Alloy |
| title_short | The Effect of Phase Separation on the Mechanical Behavior of the Co–Cr–Cu–Fe–Ni High-Entropy Alloy |
| title_sort | effect of phase separation on the mechanical behavior of the co cr cu fe ni high entropy alloy |
| topic | high-entropy alloys phase separation mechanical behaviors molecular dynamics simulation |
| url | https://www.mdpi.com/1996-1944/14/21/6523 |
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