Wear Behavior of Cooling Slope Rheocast A356 Al Alloy

Das, Prosenjit and Show, Bijay K and Rathore, Aakash and Samanta, Sudip K (2015) Wear Behavior of Cooling Slope Rheocast A356 Al Alloy. In: TRIBOLOGY TRANSACTIONS, 58 (6). pp. 1054-1066.

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Abstract

In the present study, the dry sliding wear behavior of rheocast A356 Al alloys, cast using a cooling slope, as well as gravity cast A356 Al alloy have been investigated at a low sliding speed of 1ms(-1), against a hardened EN 31 disk at different loads. The wear mechanism involves microcutting-abrasion and adhesion at lower load for all of the alloys studied in the present work. On the other hand, at higher load, mainly adhesive wear along with oxide formation is observed for gravity cast A356 Al alloy and rheocast A356 Al alloy, cast using a 45 degrees slope angle. Unlike other alloys, 60 degrees slope rheocast A356 Al alloy is found to undergo mainly abrasive wear at higher load. Accordingly, the rheocast sample, cast using a 60 degrees cooling slope, exhibits a remarkably lower wear rate at higher load compared to gravity cast and 45 degrees slope rheocast samples. This is attributed to the dominance of abrasive wear at higher load in the case of rheocast A356 Al alloy cast using a 60 degrees slope. The presence of finer and more spherical primary Al grain morphology is found to resist adhesive wear in case of 60 degrees cooling slope processed rheocast alloy and thereby delay the transition of the wear regime from normal wear to severe wear.

Item Type:	Journal Article
Publication:	TRIBOLOGY TRANSACTIONS
Publisher:	TAYLOR & FRANCIS INC
Additional Information:	Copy right for this article belongs to the TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
Keywords:	Semisolid; Cooling Slope; Rheocast; Spheroidal; Abrasive Wear; Adhesive Wear
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	01 Oct 2015 04:25
Last Modified:	01 Oct 2015 04:25
URI:	http://eprints.iisc.ac.in/id/eprint/52468

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