Some studies on hot extrusion of rapidly solidified Mg alloys |
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Authors: | Surendra Kumar |
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Affiliation: | (1) Forge Technology Department, National Institute of Foundry and Forge Technology, 834 003 Ranchi, India |
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Abstract: | Rapidly solidified magnesium alloys show great potential for application in automotive and aerospace industries. In this study,
Mg-Al-Zn alloys (AZ91) were rapidly solidified by a melt-spinning process to form ribbons. Pulverized ribbons were cold-compacted
and then hot-extruded to form rods. During extrusion, a specially designed die with constant strain rate profile was used
and found to be advantageous. By properly establishing the complete process, extruded rods of rapidly solidified AZ91 alloys
exhibiting good combination of room temperature strength and ductility were produced. Microstructural investigations were
carried out on melt-spun ribbons and extruded rods. Effects of extrusion die shape, extrusion ratio, and extrusion temperature
on mechanical properties of the extruded rods were also investigated. |
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Keywords: | extrusion die profile hot extrusion magnesium alloy rapid solidification |
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