Structure and Phase Composition of the Al-Ti System Composites after Heat Treatment

Abstract

The studies results of the titanium with aluminum diffusion interaction at a temperature of 650 oC are presented. The phase and chemical composition of the diffusion interaction zone, the nature of the change in its thickness from the exposure time are determined. It is shown that accelerated cooling of explosion-welded composites from the heat treatment temperature leads to spontaneous separation of the aluminum layer with the formation of a coating based on the TiAl3 intermetallic compound on the titanium surface.

Kinetics of diffusion interaction in the Ti-NiCr system layered composites

“…An increase in heat and wear resistance of titanium alloys is possible by creating functionally graded intermetallic coatings on their surface based on doped nickel and chromium aluminides [1][2][3][4][5]. For the formation of such coatings at the Department of Materials Science and Composite Materials of the Volgograd state technical university, a technology was proposed that provides for the deposition of a barrier layer of nichrome (Cr20Ni80 alloy) on the surface of titanium (titanium alloy) at the first stage by explosion welding, and at the second stage, aluminizing of the resulting workpiece by immersion in aluminum melt [6].…”