On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperature
In the present work, the deformation mechanisms of the CoCrFeMnNi high-entropy alloy at 77 K were investigated using thermal activation analyses. The strain rate jump test was performed to estimate strain rate sensitivity and the activation volume of the alloy. Transmission electron microscopy analy...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2017-11-01
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| Series: | Materials Research Letters |
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| Online Access: | http://dx.doi.org/10.1080/21663831.2017.1323807 |
| _version_ | 1819075058336792576 |
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| author | Jongun Moon Sun Ig Hong Jae Wung Bae Min Ji Jang Dami Yim Hyoung Seop Kim |
| author_facet | Jongun Moon Sun Ig Hong Jae Wung Bae Min Ji Jang Dami Yim Hyoung Seop Kim |
| author_sort | Jongun Moon |
| collection | DOAJ |
| description | In the present work, the deformation mechanisms of the CoCrFeMnNi high-entropy alloy at 77 K were investigated using thermal activation analyses. The strain rate jump test was performed to estimate strain rate sensitivity and the activation volume of the alloy. Transmission electron microscopy analyses were performed to identify the evolution of twins at low temperatures. The insensitivity of activation volume to strain observed in the CoCrFeMnNi alloy at 77 K was different from the observed increase in the activation volume with strain at room temperature, which occurred due to the shearing of nanoscale inhomogeneities, such as co-clusters and short-range orders. |
| first_indexed | 2024-12-21T18:19:22Z |
| format | Article |
| id | doaj.art-232e292982a247eb9915007cf696f853 |
| institution | Directory Open Access Journal |
| issn | 2166-3831 |
| language | English |
| last_indexed | 2024-12-21T18:19:22Z |
| publishDate | 2017-11-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj.art-232e292982a247eb9915007cf696f8532022-12-21T18:54:34ZengTaylor & Francis GroupMaterials Research Letters2166-38312017-11-015747247710.1080/21663831.2017.13238071323807On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperatureJongun Moon0Sun Ig Hong1Jae Wung Bae2Min Ji Jang3Dami Yim4Hyoung Seop Kim5Pohang University of Science and TechnologyChungnam National UniversityPohang University of Science and TechnologyPohang University of Science and TechnologyPohang University of Science and TechnologyPohang University of Science and TechnologyIn the present work, the deformation mechanisms of the CoCrFeMnNi high-entropy alloy at 77 K were investigated using thermal activation analyses. The strain rate jump test was performed to estimate strain rate sensitivity and the activation volume of the alloy. Transmission electron microscopy analyses were performed to identify the evolution of twins at low temperatures. The insensitivity of activation volume to strain observed in the CoCrFeMnNi alloy at 77 K was different from the observed increase in the activation volume with strain at room temperature, which occurred due to the shearing of nanoscale inhomogeneities, such as co-clusters and short-range orders.http://dx.doi.org/10.1080/21663831.2017.1323807High-entropy alloystrain rate sensitivitythermally activated processtransmission electron microscopytwinning |
| spellingShingle | Jongun Moon Sun Ig Hong Jae Wung Bae Min Ji Jang Dami Yim Hyoung Seop Kim On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperature Materials Research Letters High-entropy alloy strain rate sensitivity thermally activated process transmission electron microscopy twinning |
| title | On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperature |
| title_full | On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperature |
| title_fullStr | On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperature |
| title_full_unstemmed | On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperature |
| title_short | On the strain rate-dependent deformation mechanism of CoCrFeMnNi high-entropy alloy at liquid nitrogen temperature |
| title_sort | on the strain rate dependent deformation mechanism of cocrfemnni high entropy alloy at liquid nitrogen temperature |
| topic | High-entropy alloy strain rate sensitivity thermally activated process transmission electron microscopy twinning |
| url | http://dx.doi.org/10.1080/21663831.2017.1323807 |
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