Microstructure and Properties of the Spray-Formed and Extruded 7075 Al Alloy

Jeyakumar, M and Kumar, S and Gupta, GS (2010) Microstructure and Properties of the Spray-Formed and Extruded 7075 Al Alloy. In: Materials and Manufacturing Processes, 25 (8). pp. 777-785.

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Abstract

In the present investigation, a very good combination of strength and ductility, 630MPa 0.2% proof stress and 14.8% elongation to fracture in tensile test, has been obtained for the 7075 Al alloy after optimizing the processing parameters for spray forming, hot extruding the spray deposit, and peak aging the samples taken from the extruded rod. The spray deposits contained some porosity but it was almost eliminated on hot extrusion. Electron probe microanalysis revealed that even though spray forming was carried out in an open atmosphere, it did not affect the oxygen content and its distribution in the material on spray forming, because the atomizing argon gas provided a protective cover to molten droplets and prevented their oxidation. The chemical composition of the spray-formed material was found to be almost the same as the raw material, and the major alloying elements were found to be uniformly distributed in the extruded rod.

Item Type:	Journal Article
Publication:	Materials and Manufacturing Processes
Publisher:	Taylor and Francis Group
Additional Information:	Copyright of this article belongs to Taylor and Francis Group.
Keywords:	Aluminum alloy; Extrusion; Microstructure; Porosity; Spray forming; Tensile properties.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	27 Sep 2010 11:19
Last Modified:	28 Sep 2010 08:32
URI:	http://eprints.iisc.ac.in/id/eprint/32468

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