Microstructure and Grain Refining Performance of A New Al-Ti-C Master Alloy

Control of microstructure features that affect the al-ti-c master alloys grain refining efficiency is leading to improve the aluminum grain refinement. this study has been done to find the solute effect theory to produce new al-ti-c master alloys to get more possibility to control these features. the produced master alloys were examined by scanning electron microscopy (sem), energy-dispersive spectroscopy (eds), and x-ray diffraction (xrd); also, the influence of them on pure aluminum was studied. produced al-6ti-1c master alloy contained ti and tic particles in the aluminum matrix and al-4ti-1c contained tic particles in the aluminum matrix. as the result, the produced al-6ti-1c master alloy is a more efficient grain refiner for pure aluminum as compared to the al-4ti-1c. this confirms the influence of ti particles for grain refinement. the results showed that al-6ti-1c master alloy had maximum grain refining performance with 2 minutes holding time , at 983 ok temperature , and 1% wt master alloy addition. finally, a new al-ti-c master alloy with excellent refinement has been prepared successfully.