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Effect of extrusion speed on microstructure and mechanical properties of the Mg-Ca binary alloy
- Source :
- Journal of Magnesium and Alloys, Vol 9, Iss 4, Pp 1297-1303 (2021)
- Publication Year :
- 2021
- Publisher :
- KeAi Communications Co., Ltd., 2021.
-
Abstract
- This work reported the effect of extrusion speeds on the microstructures and mechanical properties of Mg-Ca binary alloy. The results showed that yield strength of the as-extruded Mg-1.2 wt.% Ca alloys decrease from ∼ 360 MPa to ∼ 258 MPa as the ram speed increases from 0.4 mm/s to 2.4 mm/s, and the elongation increases from ∼ 3.9% to ∼ 12.2%. The microstructure changes from bimodal grain feature to the complete dynamical recrystallization (DRX) with increase of the extrusion speed. The ultrafine DRXed grains in size of ∼0.85 µm, the numerous nano-Mg2Ca particles dispersing along the grain boundaries and interiors, as well as the high density of residual dislocations, should account for the high strength. It is believed that the high degree of dynamic recrystallization and the resulting texture randomization play the critical roles in the ductility enhancement of the high-speed extruded Mg alloys.
- Subjects :
- 010302 applied physics
Materials science
Mining engineering. Metallurgy
Mg alloys
Binary alloy
Metals and Alloys
TN1-997
Recrystallization (metallurgy)
Mechanical properties
02 engineering and technology
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
Mg-Ca alloy
Mechanics of Materials
0103 physical sciences
Dynamic recrystallization
Extrusion
Grain boundary
Extrusion speed
Elongation
Composite material
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 22139567
- Volume :
- 9
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Journal of Magnesium and Alloys
- Accession number :
- edsair.doi.dedup.....139732e243ae47ff78fb0b6cd0300ef7