A K , Jha and G. S., Upadhya and P K , Rohtagi (1986) Properties of composites of 2014 aluminium alloy with Ni-Mo based metallic glass paricles. Journal of Materials Science, 21. pp. 1502-1508. ISSN 0022-2461

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Abstract

Composites of 2014 aluminium alloy containing dispersions of metallic glass particles (51.5wt% Ni, 38.0wt% Mo, 8.0wt% Cr and 1.5wt% B) have been prepared by a conventional powder metallurgy route involving powder mixing, compaction, sintering and heat treatment. Physical and mechanical properties of the composites, such as dimensional changes, hardness, electrical resistivity and corrosion behaviour, were studied. Dimensional growth up to a maximum of 6% in a linear direction was observed in all sintered composites. HardnessHv increased from 40 to 55kgmm−2 with the addition of 4vol% of dispersoid, followed by a gradual decrease with increasing additions of dispersoid. The decrease in hardness above 4vol% of dispersoid was attributed to the presence of increasing amounts of porosity. Electrical resistivity increased from 50nΩm (for 2014 aluminium alloy) to 180nΩm at 20vol% dispersoid. The corrosion rate in an artificial sea water environment decreased linearly with the volume fraction of dispersoid. Re-pressing and re-sintering (in an argon atmosphere) of composites containing 4vol% of metallic glass particles resulted in an increase inHv from 55 (argon sintering) to 83kgmm−2, and a decrease in electrical resistivity from 57 to 52nΩm due to the increase in density. The corrosion rate in an artificial sea water environment of composites containing 4vol% of metallic glass decreased from 70×10−3 to 50×10−3 mgdm−2 per day due to re-pressing and re-sintering

Item Type:	Article
Subjects:	Lightweight Materials
Divisions:	UNSPECIFIED
Depositing User:	Mr. B.K. Prasad
Date Deposited:	13 Aug 2013 10:26
Last Modified:	05 Mar 2014 07:31
URI:	http://ampri.csircentral.net/id/eprint/330

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