Effect of Quenching Temperature on the ...

Ti-6Al-4V alloy is a workhorse of titanium industry; it accounts for about 60 percent of the total titanium alloy production. The high cost of titanium makes net shape manufacturing routes very attractive. Casting is a near net shape manufacturing route that offers significant cost advantages over forgings or complicated machined parts. However, the disadvantage of the as-cast titanium alloys, like other cast metals, is that the heat treatment remains only a limited option for improvement of their properties. The objective of this work was to study the effect of water quenching on mechanical properties of cast Ti-6Al-4V alloy. Tensile, hardness and charpy impact toughness tests were performed. The results showed that the final properties of cast Ti-6Al-4V alloy are highly dependent on the quenching temperature.