Oxidation–nitridation-induced recrystallization in a near-α titanium alloy

Publication date: 5 January 2018
Source:Materials & Design, Volume 137
Author(s): Tomonori Kitashima, Toru Hara, Yang Yang, Yuka Hara
The oxidation resistance of titanium alloys is an important property for high-temperature applications. Here, the oxidation–nitridation-induced recrystallization at the oxide–metal interface of a near-α titanium alloy substrate was analyzed using electron-backscatter diffraction and scanning transmission electron microscopy after oxidation tests at 750°C for 500h in air. Oxidation–nitridation-induced recrystallization was promoted by the enrichment of nitrogen at the interface, and grains comprising Ti2N and Ti3AlN grew from the interface with the inhomogeneous distribution of nitrogen.

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