Mechanical properties and microstructures of Al-1Fe-(0-1)Zr bulk nano-crystalline alloy processed by mechanical alloying and spark plasma sintering

摘要

A high strength bulk nano-crystalline Al-1 Fe-(0-1 )Zr alloys were processed by mechanical alloying and spark plasma sintering. The high yield strength of ~850MPa was achieved in an Al-lFe-0.5Zr alloy with 19% strain in compression. The high strength was attributed to the nanosized Al-Fe grains and the dispersion of fine Al_6 Fe particles. High temperature compressive yield strength of 455 MPa and elongation of 16.7% was achieved at 250℃.