Mechanical Properties of Cold-worked and High-Low Temperature Duplex Aged Ti-15V-3Cr-3Sn-3A1 Alloy

Abstract

Mechanical properties were studied by tensile test of Ti-15V-3Cr-3Sn-3A1 alloy obtained by duplexaging after cold-swaging, i.e. aging at higher temperatures followed by reaging at a lower temperature. Combinations of short-time aging at 823 K, 873 K and 923 K and reaging at 673 K have improved strength-ductility balance of this alloy greatly, realizing high strength of about 1.8 GPa with tensile elongation of 5%. This duplex aging process further diminishes the influence of reduction of cold-swaging on mechanical properties after aging.