Effect of iron and combined iron and beryllium additions on the fracture toughness and microstructures of squeeze-cast Al-7Si-0.3Mg alloy

Murali, S and Trivedi, A and Shamanna, KS and Murthy, KSS (1996) Effect of iron and combined iron and beryllium additions on the fracture toughness and microstructures of squeeze-cast Al-7Si-0.3Mg alloy. In: Journal of Materials Engineering and Performance, 5 (4). pp. 462-468.

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Abstract

Squeeze casting is a near-net-shape process of casting under pressure that yields a fine-grain structure with higher density and mechanical properties compared to conventional casting processes. Iron is the most commonly present impurity element in AI-7Si-0.3Mg, the alloy investigated. An increase in iron content significantly decreases fracture toughness. However, trace additions of beryllium completely neutralize the detrimental effect of iron. The variables of the squeeze casting process greatly govern the microstructures and macrostructures and thus the defects in the casting. This case study deals with AI-7Si-0.3Mg squeeze-cast cranks with four major defects-blistering, debonding, porosity, and patches of silicon segregation on the casting surface--and the appropriate remedial measures to eliminate these defects.

Item Type:	Journal Article
Publication:	Journal of Materials Engineering and Performance
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	aluminum alloys, beryllium, iron, squeeze casting
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	16 Jul 2007
Last Modified:	13 Apr 2011 07:11
URI:	http://eprints.iisc.ac.in/id/eprint/11570

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