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The microstructure and quasi-static compression properties at elevated temperatures of the aged vacuum die-casting Mg-4Al-4(La, Ce) alloy
- Source :
- Journal of Materials Research and Technology, Vol 23, Iss , Pp 4293-4306 (2023)
- Publication Year :
- 2023
- Publisher :
- Elsevier, 2023.
-
Abstract
- In this study, the hot compression test of the aged vacuum die-casting Mg-4Al-4(La, Ce) alloy was performed on Gleeble-3500 simulator. The mechanical properties of Mg-4Al-4(La, Ce) alloy were studied at different compression temperatures (100 °C, 150 °C, 200 °C, and 250 °C). During the compression, the microstructure evolution, texture, and dislocation slip of the Mg-4Al-4(La, Ce) alloy were systematically investigated by the electron backscatter diffraction (EBSD) technology. The results demonstrated that the flow stress decreased and the plasticity boosted with the increase in temperature. Mg-4Al-4(La, Ce) alloy exhibits excellent strength and toughness with elevated temperature. At 200 °C, it still has compressive strength of 204.5 MPa and compressive elongation of 59%. By observation of the microstructure, it has typical //CD texture after compression. It was found by in-grain misorientation axis (IGMA) analysis that the pyramidal slip is sufficiently activated, which effectively improves the toughness of the alloy. In addition, the dislocations and dislocations are observed at 200 °C. Therefore, the excellent mechanical properties of Mg-4Al-4(La, Ce) alloy at high temperature are the result of grain refinement strengthening, second-phase reinforcement and work hardening.
Details
- Language :
- English
- ISSN :
- 22387854
- Volume :
- 23
- Issue :
- 4293-4306
- Database :
- Directory of Open Access Journals
- Journal :
- Journal of Materials Research and Technology
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.835d87fe7434ec49b9d43eeb085415e
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.jmrt.2023.02.047