Effect of a Grain Refiner Cum Modifier on Mechanical Properties of Al-7Si and Al-11Si Alloys

Jigajinni, SM and Venkateswarlu, K and Kori, SA (2013) Effect of a Grain Refiner Cum Modifier on Mechanical Properties of Al-7Si and Al-11Si Alloys. Metals and Materials International, 19 (2). pp. 171-181.

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Abstract

This study evaluates the influence of grain refiners/modifiers on the mechanical properties of the Al-7Si and Al-11Si alloys with an experiment of quantitative and qualitative correlations with the microstructure. Modification of Al-Si alloys with strontium additions and grain refinement with Al-Ti, Al-B and Al-T-B master alloy additions are demonstrated to be efficient on Al-Si alloys. A single master alloy with combined additions of Sr and Ti and/or B was prepared and the microstructure and mechanical properties were studied. The results show that boron rich (Al-3B-Sr and Al-1Ti-3B-Sr) master alloys are more efficient than Ti rich (Al-3Ti-Sr and Al-5Ti-1B-Sr) master alloys considering their combined grain refinement and modification effect on Al-7Si and Al-11Si alloys. However, the presence of Sr does not influence the grain refinement. Similarly, presence of grain refiner does not influence the modification of eutectic Si.

Item Type:	Article
Additional Information:	Copyright to this article belongs to M/s. Springer
Uncontrolled Keywords:	Alloys;Casting;Grain refinement;Scanning electron microscopy;Dendritic arm spacing
Subjects:	AERONAUTICS > Aeronautics (General) CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User:	Ms. Alphones Mary
Date Deposited:	05 Aug 2014 10:15
Last Modified:	05 Aug 2014 10:15
URI:	http://nal-ir.nal.res.in/id/eprint/11994

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