Nano-graining a particle-strengthened high-entropy alloy
The possibility of further enhancing the strength of a (CoCrFeNi)₉₄Ti₂Al₄ high-entropy alloy (HEA), which is already strengthened by Ni₃(Ti,Al) second-phase particles, by grain refinement through high-pressure torsion (HPT) is examined. Concomitant with nanograin formation, HPT was found to induce p...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/151737 |
| _version_ | 1811694421075296256 |
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| author | Lee, Dong-Hyun Park, Jeong-Min Yang, Guanghui He, Junyang Lu, Zhaoping Suh, Jin-Yoo Kawasaki, Megumi Ramamurty, Upadrasta Jang, Jae-il |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Lee, Dong-Hyun Park, Jeong-Min Yang, Guanghui He, Junyang Lu, Zhaoping Suh, Jin-Yoo Kawasaki, Megumi Ramamurty, Upadrasta Jang, Jae-il |
| author_sort | Lee, Dong-Hyun |
| collection | NTU |
| description | The possibility of further enhancing the strength of a (CoCrFeNi)₉₄Ti₂Al₄ high-entropy alloy (HEA), which is already strengthened by Ni₃(Ti,Al) second-phase particles, by grain refinement through high-pressure torsion (HPT) is examined. Concomitant with nanograin formation, HPT was found to induce particle dissolution and structural transformation of the remnant particles. Nanoindentation experiments of nanocrystalline HEA, with and without particles in the pre-HPT microstructure, suggests that grain boundary strengthening is the dominant strengthening mechanism. |
| first_indexed | 2024-10-01T07:07:18Z |
| format | Journal Article |
| id | ntu-10356/151737 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:07:18Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1517372021-07-21T09:33:17Z Nano-graining a particle-strengthened high-entropy alloy Lee, Dong-Hyun Park, Jeong-Min Yang, Guanghui He, Junyang Lu, Zhaoping Suh, Jin-Yoo Kawasaki, Megumi Ramamurty, Upadrasta Jang, Jae-il School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering High-entropy Alloy Particle Strengthening The possibility of further enhancing the strength of a (CoCrFeNi)₉₄Ti₂Al₄ high-entropy alloy (HEA), which is already strengthened by Ni₃(Ti,Al) second-phase particles, by grain refinement through high-pressure torsion (HPT) is examined. Concomitant with nanograin formation, HPT was found to induce particle dissolution and structural transformation of the remnant particles. Nanoindentation experiments of nanocrystalline HEA, with and without particles in the pre-HPT microstructure, suggests that grain boundary strengthening is the dominant strengthening mechanism. The work at Hanyang University was supported by the National Research Foundation of Korea (NRF) grants funded by the Ministry of Science and ICT (No. 2015R1A5A1037627 and No. 2017R1A2B4012255). The work at Oregon State University was supported by the National Science Foundation of the United States under Grant No. DMR-1810343. 2021-07-21T09:33:17Z 2021-07-21T09:33:17Z 2019 Journal Article Lee, D., Park, J., Yang, G., He, J., Lu, Z., Suh, J., Kawasaki, M., Ramamurty, U. & Jang, J. (2019). Nano-graining a particle-strengthened high-entropy alloy. Scripta Materialia, 163, 24-28. https://dx.doi.org/10.1016/j.scriptamat.2018.12.033 1359-6462 https://hdl.handle.net/10356/151737 10.1016/j.scriptamat.2018.12.033 2-s2.0-85059459330 163 24 28 en Scripta Materialia © 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering High-entropy Alloy Particle Strengthening Lee, Dong-Hyun Park, Jeong-Min Yang, Guanghui He, Junyang Lu, Zhaoping Suh, Jin-Yoo Kawasaki, Megumi Ramamurty, Upadrasta Jang, Jae-il Nano-graining a particle-strengthened high-entropy alloy |
| title | Nano-graining a particle-strengthened high-entropy alloy |
| title_full | Nano-graining a particle-strengthened high-entropy alloy |
| title_fullStr | Nano-graining a particle-strengthened high-entropy alloy |
| title_full_unstemmed | Nano-graining a particle-strengthened high-entropy alloy |
| title_short | Nano-graining a particle-strengthened high-entropy alloy |
| title_sort | nano graining a particle strengthened high entropy alloy |
| topic | Engineering::Mechanical engineering High-entropy Alloy Particle Strengthening |
| url | https://hdl.handle.net/10356/151737 |
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