Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by aging
While simulations predict that local chemical order in multi-principal-element alloys (MPEAs) renders anomalous dislocation behaviors and thereby varied strain rate sensitivity (SRS) and creep behaviors, the experimental demonstration of such an effect is still under exploration due to the challenge...
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| Format: | Article |
| Language: | English |
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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/S2238785424028278 |
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| author | Zhanxuan Zhang Weize Kong Qiang Zhang Kaiyuan Yu |
| author_facet | Zhanxuan Zhang Weize Kong Qiang Zhang Kaiyuan Yu |
| author_sort | Zhanxuan Zhang |
| collection | DOAJ |
| description | While simulations predict that local chemical order in multi-principal-element alloys (MPEAs) renders anomalous dislocation behaviors and thereby varied strain rate sensitivity (SRS) and creep behaviors, the experimental demonstration of such an effect is still under exploration due to the challenges in the manipulation of local chemical order. Here we investigate SRS and creep behavior of CoCrNi MPEAs subjected to long-term aging at various temperatures using nanoindentation. Our results reveal that the SRS and creep resistance of the alloys enhance significantly with increasing aging temperatures, with the SRS notably surpassing that of elemental and solid solution counterparts. In particular, unusual magnitude of creep stress exponent is observed at room temperature and the possible mechanisms are discussed. We suggest that long-term aging could be a straightforward method to tailor the microstructural ordering and mechanical properties of MPEAs, aiming at bridging the gap between simulations and experiments. |
| format | Article |
| id | doaj-art-ec51fde2612f4aa09fdd8d0ff01dcc05 |
| 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-ec51fde2612f4aa09fdd8d0ff01dcc052025-08-20T02:35:26ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01339785979010.1016/j.jmrt.2024.12.024Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by agingZhanxuan Zhang0Weize Kong1Qiang Zhang2Kaiyuan Yu3Department of Materials Science and Engineering, China University of Petroleum-Beijing, Beijing, 102249, ChinaDepartment of Materials Science and Engineering, China University of Petroleum-Beijing, Beijing, 102249, ChinaDepartment of Materials Science and Engineering, China University of Petroleum-Beijing, Beijing, 102249, ChinaCorresponding author.; Department of Materials Science and Engineering, China University of Petroleum-Beijing, Beijing, 102249, ChinaWhile simulations predict that local chemical order in multi-principal-element alloys (MPEAs) renders anomalous dislocation behaviors and thereby varied strain rate sensitivity (SRS) and creep behaviors, the experimental demonstration of such an effect is still under exploration due to the challenges in the manipulation of local chemical order. Here we investigate SRS and creep behavior of CoCrNi MPEAs subjected to long-term aging at various temperatures using nanoindentation. Our results reveal that the SRS and creep resistance of the alloys enhance significantly with increasing aging temperatures, with the SRS notably surpassing that of elemental and solid solution counterparts. In particular, unusual magnitude of creep stress exponent is observed at room temperature and the possible mechanisms are discussed. We suggest that long-term aging could be a straightforward method to tailor the microstructural ordering and mechanical properties of MPEAs, aiming at bridging the gap between simulations and experiments.http://www.sciencedirect.com/science/article/pii/S2238785424028278Local chemical orderNanoindentationStrain rate sensitivityCreepMulti-principal-element alloys |
| spellingShingle | Zhanxuan Zhang Weize Kong Qiang Zhang Kaiyuan Yu Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by aging Journal of Materials Research and Technology Local chemical order Nanoindentation Strain rate sensitivity Creep Multi-principal-element alloys |
| title | Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by aging |
| title_full | Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by aging |
| title_fullStr | Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by aging |
| title_full_unstemmed | Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by aging |
| title_short | Tailoring strain rate sensitivity and creep behavior of CoCrNi multi-principal-element alloys by aging |
| title_sort | tailoring strain rate sensitivity and creep behavior of cocrni multi principal element alloys by aging |
| topic | Local chemical order Nanoindentation Strain rate sensitivity Creep Multi-principal-element alloys |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424028278 |
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