The effect of B elements and cooling rate on the microstructure and tensile properties of Al-7%Si-0.5% Mg alloy

This work carried out to investigate the effect of different amounts of B (0.01, 0.05, 0.1 and 0.5) and cooling rate on Al-7%Si-0.5%Mg alloy. The samples were examined by using optical microscopy (OM) and tensile testing to evaluate the modification efficiency of the alloy with different B contents. The optimum level B as Al–B grain refiners was found. Grain size and dendrite arm spacing decreased, due to increasing cooling rate and B grain refiner through reduced sections. Increasing cooling rate results in higher strength and B-refined specimens showed highest tensile strength and elongation values

کلیدواژه ها:

Aluminium alloys ، Casting ، Grain refinement