Microstructure Characterization and Mechanical Properties of Linear Friction Welded Ti‐6Al‐4V Alloy

Abstract

In this work, Ti-6Al-4V alloy was jointed by linear friction welding (LFW). A sound weld of thickness about 65–115 μm was obtained under the present processing parameters. The weld consisted of a superfine α + β microstructure, which is associated with the quick heating and cooling processes involved in LFW. This superfine microstructure contributes to the higher hardnesses of weld (422 ± 11Hv0.2) than that of parent Ti-6Al-4V (302 ± 20 Hv0.2). The tensile properties of weld are comparable to or higher than those of parent Ti-6Al-4V.