Comparison between Mo addition to Al Grain Refined by Ti and Ti+B on its Metallurgical and Mechanical Characteristics in the Cast and after ECAP Process Conditions

摘要

Aluminum and its alloys are widely used materials;;they are next to steel in use mainly in the automobile industry due to their high strength - to - weight ratio and corrosion resistance beside its other attractive properties. Against their attractive properties;;they have the disadvantage of solidifying in columnar structure which tends to reduce their mechanical characteristics and surface quality. Therefore it became customary to grain refine them either by Ti or Ti+B to overcome this discrepancy. In this paper, comparison between Molybdenum addition to commercially pure aluminum grain refined by Ti and Ti+B on its grain size and mechanical characteristics both in the cast and after pressing by the ECAP process is investigated and the obtained results are presented and discussed.