Effect of Heat Treatment Conditions on the Mechanical Properties and Machinability of Ti15SnxCu Alloys

Abstract

In the current work, the microstructure, mechanical properties and machinability of Ti15SnxCu alloys (x = 0 to 2 wt. %) were investigated. The alloy was prepared by the vacuum arc remelting and casting route and then thermally processed by solutionizing at 1000 °C for 2 hours, followed by water quenching. By controlling the heat-treated condition and Cu content, the highest bending strength and modulus were obtained from three-point bending testing. The increases were mainly caused by the strengthening effects of the formation of crystallites with fine grain size and nano-Ti 2 Cu precipitate phase. In addition, nano-Ti 2 Cu precipitation was caused by crack initiation and propagation, which reduced the ductility and improved the machinability of Ti15Sn2Cu alloy.

Effect of Cu Content on the Precipitation Behaviors, Mechanical and Corrosion Properties of As-Cast Ti-Cu Alloys

“…Cu is an active eutectoid β stabilizer element in titanium alloys, and the melting temperature of the Ti-Cu alloy decreases with the increase of Cu content [ 11 , 12 ]. The addition of Cu element to titanium can favor casting and improve the mechanical properties of the products [ 13 ].…”