Study on Grain Refinement Efficiency of Cast Aluminum Alloy via Aluminium Titanium Boron Addition

Grain refinement of aluminium and its alloys is a common industrial practice, particularly for automobile casting. The grain refines with titanium agent influence better mechanical behaviour such as higher yield and ultimate tensile strength rather than monolithic alloy. Present study, the halide salt method has been used to produce the Al-Ti-B grain refiners with different Ti/B ratios. The prepared grain refiner is added in A356 alloy and observed its grain refining efficiency. The addition of grain refiner to A356 aluminium alloy at different holding times, such as 10, 20, and 30 min, allowed it to solidify. It is found that 30 min of holding time with 5Ti1B improves the hardness (40%) and ultimate tensile strength (UTS) value (63.56%). A high degree of grain refinement was observed in a 30-minute holding time with 5Ti1B with improved grain refining efficiency of 3 %. Its microstructural observation and tensile properties helped us understand this grain refinement.