Rapid dislocation-mediated solute repartitioning towards strain-aging hardening in a fine-grained dilute magnesium alloy
| Autor: | Zhen-Ming Hua, Min Zha, Zhao-Yuan Meng, Shen-Bao Jin, Gang Sha, Tian-Shuai Wang, Cheng Wang, Hai-Long Jia, Yipeng Gao, Hui-Yuan Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Materials Research Letters, Vol 10, Iss 1, Pp 21-28 (2022) |
| Druh dokumentu: | article |
| ISSN: | 2166-3831 21663831 |
| DOI: | 10.1080/21663831.2021.2009585 |
| Popis: | Achieving appreciable strain-aging hardening coupling with fine-grain strengthening remains a critical challenge in dilute Mg alloys, as high-temperature solid-solution, utilized to impart high-level solutes for strain-aging, inevitably causes grain coarsening and great strength loss. Herein, we report a rapid dislocation-mediated solute repartitioning behavior upon aging in a low-temperature annealed Mg–1.0Zn–0.45Ca–0.33Sn–0.2Mn (wt.%) alloy. Thereby, appreciable strain-aging hardening (YS increment of ∼30 MPa) coupling with fine-grain (grain size of ∼2.5 µm) strengthening accounts for a high yield strength (∼297 MPa) and ductility (∼20%). It suggests a feasible avenue to develop strong dilute Mg alloys by combining strain-aging hardening and fine-grain strengthening. |
| Databáze: | Directory of Open Access Journals |
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