Amorphous forming ability and mechanical properties of rapidly solidifed Al-Zr-LTM (LTM=Fe, Co, Ni and Cu) alloys

摘要

Amorphous forming ability (AFA) and mechanical properties of Al_100-x-yZr_xLTM_y (LTM=Fe, Co, and Cu, x=0-7, y=0-16) amorphou alloys with high aluminum concentration have been studied. A single amorphous phase is formed under composition of 11 at./100 <=(Zr+Fe)Co)))<=15 at./100 and 13 at./100 <=(Zr+Ni)<=17 at./100 with 1 at./00<=Zr<=7 at./100 alloys. When the LTM elements in these alloys are replaced by Cu, no single amorphous phase is formed. The factors, including atomic radius, element content, enthalpy of mixing and maximum extended solid solubility, which affect the amorphous forming radius, element content, enthalpy of mixing and maximum extended solid solubility, which affect the alloys and single amorphous phase alloys are also tested. Most of the present amorphous alloys show high tensile strength over 1000 MPa.