| Autor: |
Tun, Khin Sandar, Nahata, Anchal, Vincent, Shantha, Gupta, Manoj |
| Předmět: |
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| Zdroj: |
JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Feb2023, Vol. 75 Issue 2, p459-469, 11p |
| Abstrakt: |
Aiming to develop new generation lightweight alloys, a magnesium-based multicomponent alloy, Mg70Al18Zn6Ca4Y2 (atomic %), was fabricated. Property investigations were performed on as-cast and as-extruded materials to perceive the variation in the microstructure and mechanical properties. Magnesium solid solution phase and three intermetallic compounds with blocky, dendritic and lamellar morphologies were evolved in cast alloy's microstructure. The continuous phases (dendrites and lamellae) crushed into discontinuous, fine phases were observed in extruded alloy's microstructure leaving blocky phases mostly untouched. Microstructure refinement, hardness and compressive property enhancements were realized in extruded alloy. Lightweight multicomponent alloys based on magnesium and aluminum alloys have so far been reported to be hard and brittle with very limited deformability in as-cast condition and as a result secondary processing such as extrusion and rolling are difficult to apply. The as-cast alloy exhibited a reasonable elongation of 6.9% and following extrusion the alloy showed an improved elongation of 13.7% together with exceptionally high yield and compressive strength of 388 MPa and 647 MPa. The properties of as-DMD and extruded alloy convincingly exceeded the properties of many existing commercial Mg alloys such as AZ31, AZ91 and WE 43. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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