Mechanical Properties and Microstructures of Melt-quenched Al-Fe-Ti-M (M=V,Cr,Mn) Alloys

Ribbons of Al-Fe-Ti-M (M=V,Cr,Mn) alloys were prepared by melt-quenching (MQ) and their bulk alloys by the powder metallurgy (P/M) method using atomized powders. The ribbon Al-Fe-Ti-M (M=V,Cr,Mn) alloys produced at the circumferential velocity (Vc) of 40 m/s consisted of fcc-Al and amorphous phases. Maximum tensile fracture strength ( sigma sub f ) of the Al-Fe-Ti-M ribbons was 1170 MPa for Al sub 93 Fe sub 3 Ti sub 2 V sub 2 alloy. The constitutent structure was nearly the same as those for the powder and bulk Al-Fe-Ti-M (M=V,Cr,Mn) alloys. The bulk Al sub 93 Fe sub 3 Ti sub 2 Cr sub 2 alloys consisted of quasticrystalline particles dispersed into fcc-Al. Decomposition temperature of these particles was 730K. The ultimate tensile strength, 0.2% proof strength, plastic elongation, Young's modulus and Vicker's hardness were 650 MPa, 530 MPa, 4.4%, 86 GPa and 190, respectively.