Materials Science Forum, Vol.475-479, 2699-2702, 2005
Lining of titanium alloys with hard materials by shot peening
In the present study, a lining process for titanium alloys using shot peening was investigated. In the shot peening experiment, the foil set on the titanium alloy substrate is pelted with many shots at a high velocity. The foil is bonded to the surface of the substrate due to large plastic deformation induced by the collision of the shots. Lining of the substrate with the hard powders sandwiched between two aluminum sheets was also attempted. In the experiment, a centrifugal shot peening machine with an electrical heater was employed. The substrates are commercially pure titanium and titanium alloy Ti-6Al-4V, and the foils are commercially aluminum, titanium, nickel and sandwich foil. The effects of shot speed and the heating temperature on the bondability were examined. The wear resistance was also evaluated by grinding. It was found that the dissimilar material is successfully bonded to the surface of the substrate.
Keywords:shot peening;lining;bonding;titanium alloy;surface treatment;cemented carbide;plastic deformation