| Autor: |
Rohit Jain, Harsh Soni, R.P. Mahto, B.N. Sahoo |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
International Journal of Lightweight Materials and Manufacture, Vol 6, Iss 4, Pp 574-588 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2588-8404 |
| DOI: |
10.1016/j.ijlmm.2023.09.002 |
| Popis: |
The establishment of deformation mechanisms of Mg-metal matrix composite (Mg-MMC) is important to improve the high-temperature challenging applications. In this present work, an AZ91/TiC + TiB2 hybrid in-situ Mg-MMC was synthesized, and its deformation mechanisms were studied through a uniaxial hot compressive test at different temperatures and strain rates. The Johnson-Cook (JC) model and constitutive equation were established using experimental stress-strain data. Through the development of JC model, it was revealed that the TiC–TiB2 particles enhanced the yield strength parameter and increased the activation energy of the in-situ composite compared to the parent alloy. The load-shifting capability and grain refinement were found to be the dominating mechanisms, which effectively restricted dislocation movement during deformation, resulting in improved deformation resilience of the composite. A detailed study of JC model and constitutive equation parameters was analyzed with a focus on their microstructures. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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