Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni system
Temperature-dependent plastic deformation behaviors of single crystals of quaternary and ternary equiatomic medium-entropy alloys (MEAs) belonging to the Cr-Mn-Fe-Co-Ni system were investigated in compression at temperatures in the range 9 K to 1373 K. Their critical resolved shear stresses (CRSSs)...
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Taylor & Francis Group
2024-12-01
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| Series: | Science and Technology of Advanced Materials |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/14686996.2024.2376524 |
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| author | Le Li Zhenghao Chen Seiko Tei Yusuke Matsuo Ryosuke Chiba Koretaka Yuge Haruyuki Inui Easo P. George |
| author_facet | Le Li Zhenghao Chen Seiko Tei Yusuke Matsuo Ryosuke Chiba Koretaka Yuge Haruyuki Inui Easo P. George |
| author_sort | Le Li |
| collection | DOAJ |
| description | Temperature-dependent plastic deformation behaviors of single crystals of quaternary and ternary equiatomic medium-entropy alloys (MEAs) belonging to the Cr-Mn-Fe-Co-Ni system were investigated in compression at temperatures in the range 9 K to 1373 K. Their critical resolved shear stresses (CRSSs) increase with decreasing temperature below room temperature. There is also a dulling of the temperature dependence of CRSS below 77 K due to dislocation inertial effects that we attribute to a decrease in the phonon drag coefficient. These behaviors were compared with those of previously investigated single crystals of the equiatomic Cr-Co-Ni and Cr-Fe-Co-Ni MEAs, and the equiatomic Cr-Mn-Fe-Co-Ni high-entropy alloy (HEA). The temperature dependence of CRSS and the apparent activation volumes below room temperature can be well described by conventional thermal activation theories of face-centered cubic (FCC) alloys. Above 673 K, there is a small increase in CRSS, which we believe is due to elastic interactions between solutes and mobile dislocations, the so-called Portevin-Le Chatelier (PL) effect. The CRSS at 0 K was obtained by extrapolation of fitted CRSS vs. temperature curves and compared with predictions from solid solution strengthening models of HEA and MEAs. |
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| id | doaj-art-383acc1cfd9d47bfaabd62867d0a3cd3 |
| institution | Kabale University |
| issn | 1468-6996 1878-5514 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Taylor & Francis Group |
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| spelling | doaj-art-383acc1cfd9d47bfaabd62867d0a3cd32024-12-23T08:54:38ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142024-12-0125110.1080/14686996.2024.2376524Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni systemLe Li0Zhenghao Chen1Seiko Tei2Yusuke Matsuo3Ryosuke Chiba4Koretaka Yuge5Haruyuki Inui6Easo P. George7Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, JapanDepartment of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, JapanDepartment of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, JapanDepartment of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, JapanDepartment of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, JapanDepartment of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, JapanDepartment of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, JapanMaterials Science and Engineering Department, University of Tennessee, Knoxville, TN, USATemperature-dependent plastic deformation behaviors of single crystals of quaternary and ternary equiatomic medium-entropy alloys (MEAs) belonging to the Cr-Mn-Fe-Co-Ni system were investigated in compression at temperatures in the range 9 K to 1373 K. Their critical resolved shear stresses (CRSSs) increase with decreasing temperature below room temperature. There is also a dulling of the temperature dependence of CRSS below 77 K due to dislocation inertial effects that we attribute to a decrease in the phonon drag coefficient. These behaviors were compared with those of previously investigated single crystals of the equiatomic Cr-Co-Ni and Cr-Fe-Co-Ni MEAs, and the equiatomic Cr-Mn-Fe-Co-Ni high-entropy alloy (HEA). The temperature dependence of CRSS and the apparent activation volumes below room temperature can be well described by conventional thermal activation theories of face-centered cubic (FCC) alloys. Above 673 K, there is a small increase in CRSS, which we believe is due to elastic interactions between solutes and mobile dislocations, the so-called Portevin-Le Chatelier (PL) effect. The CRSS at 0 K was obtained by extrapolation of fitted CRSS vs. temperature curves and compared with predictions from solid solution strengthening models of HEA and MEAs.https://www.tandfonline.com/doi/10.1080/14686996.2024.2376524High-entropy alloyssingle crystalscritical resolved shear stressthermal activationmean-square atomic displacement |
| spellingShingle | Le Li Zhenghao Chen Seiko Tei Yusuke Matsuo Ryosuke Chiba Koretaka Yuge Haruyuki Inui Easo P. George Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni system Science and Technology of Advanced Materials High-entropy alloys single crystals critical resolved shear stress thermal activation mean-square atomic displacement |
| title | Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni system |
| title_full | Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni system |
| title_fullStr | Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni system |
| title_full_unstemmed | Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni system |
| title_short | Analysis of the temperature-dependent plastic deformation of single crystals of quinary, quaternary and ternary equiatomic high- and medium-entropy alloys of the Cr-Mn-Fe-Co-Ni system |
| title_sort | analysis of the temperature dependent plastic deformation of single crystals of quinary quaternary and ternary equiatomic high and medium entropy alloys of the cr mn fe co ni system |
| topic | High-entropy alloys single crystals critical resolved shear stress thermal activation mean-square atomic displacement |
| url | https://www.tandfonline.com/doi/10.1080/14686996.2024.2376524 |
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