The Influence of Processing Parameters on Characteristics of an Aluminum Alloy Spray Deposition

Jeyakumar, M and Kumar, S and Gupta, GS (2009) The Influence of Processing Parameters on Characteristics of an Aluminum Alloy Spray Deposition. In: Materials and Manufacturing Processes, 24 (6). pp. 693-699.

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Abstract

In the present investigation, two nozzle configurations are used for spray deposition, convergent nozzle (nozzle-A), and convergent nozzle with 2 mm parallel portion attached at its end (nozzle-C) without changing the exit area. First, the conditions for subambient aspiration pressure, i.e., pressure at the tip of the melt delivery tube, are established by varying the protrusion length of the melt delivery tube at different applied gas pressures for both of the nozzles. Using these conditions, spray deposits in a reproducible manner are successfully obtained for 7075 Al alloy. The effect of applied gas pressure, flight distance, and nozzle configuration on various characteristics of spray deposition, viz., yield, melt flow rate, and gas-to-metal ratio, is examined. The over-spray powder is also characterized with respect to powder size distribution, shape, and microstructure. Some of the results are explained with the help of numerical analysis presented in an earlier article.

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:	Aspiration pressure;Convergent close-coupled nozzle;Gas-to-metal ratio;Microstructure;Over spray powder;Protrusion length;Spray deposition.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Aug 2009 11:21
Last Modified:	19 Sep 2010 05:30
URI:	http://eprints.iisc.ac.in/id/eprint/19828

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