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.
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Jigajinni, S.M., Venkateswarlu, K. & Kori, S.A. Effect of a grain refiner cum modifier on mechanical properties of Al-7Si and Al-11Si alloys. Met. Mater. Int. 19, 171–181 (2013). https://doi.org/10.1007/s12540-013-2006-1
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DOI: https://doi.org/10.1007/s12540-013-2006-1