A Novel Extrusion for Manufacturing TiBw/Ti6Al4V Composite Tubes with a Quasi-Continuous Reinforced Structure

Abstract

The present work introduces a novel extrusion with filler material to produce the high-performance TiBw/Ti-6Al-4V composite tube with a quasi-continuous reinforced structure. A simulation was adopted to study the effect of the filler material on the shape accuracy of the tubes. Based on the simulation results, the flow stress of the filler material was not the important factor, but the friction coefficient between the filler and TiBw/Ti-6Al-4V composite and the canning shape were critical to the tube precision. The microstructure and mechanical performance for the as-extruded TiBw/Ti-6Al-4V composite tubes were systematically investigated. After extrusion, the transverse section microstructure of the TiBw/Ti6Al4V composite tube remained quasi-continuous and the TiBw were rotated to align the extrusion direction. Moreover, the tensile strength and elongation reached 1240 MPa and 13.5%, resulting from dynamic recrystallization and whisker rotation.

Nanoparticulate reinforced composites and their application to additively manufactured TI6AL4V for use in the aerospace sector

“…Mismatch of the coefficient of thermal expansion is, therefore, relevant in the application of hybrid frames, and repair of composite structures and components [13]. The ceramic is chemically (no unwanted reaction products arise at the interface during processing or high temperature applications) and mechanically compatible with the titanium matrix [74]. It has a high melting point (3127 °C), much higher than that of Ti6l4V of 1667 °C, and a low density (4.451 g/m 3 ) [61], not much different from that of Ti6Al4V of 4.25 g/m 3 .…”