Directional atomic rearrangements during transformations between the α- and γ- phases in titanium aluminides

Liss, KD; Stark, A; Bartels, A; Clemens, H; Buslaps, T; Phelan, D; Yeoh, LA

Directional atomic rearrangements during transformations between the α- and γ- phases in titanium aluminides

Date

2008-04

Authors

Publisher

Wiley-VCH Verlag Berlin

Abstract

Making movies in-situ at glowing temperatures up to 1300°C through a microscope (false color image) and from two-dimensional X-ray diffraction (movie frames) reveal the lattice correlations, gradients and intermediate structures during phase transformations in titanium aluminide. A quenched, α2-rich γ-based TiAl first approaches its equilibrium by α2 → γ on a heating ramp, disorders α2 → α and then evolves reversely γ → α, which are morphologically different processes. © 2008, Wiley-VCH Verlag Berlin

Keywords

Titanium, X-ray diffraction, Microscopy, Phase transformations, Synchrotron radiation, In-situ processing

Citation

Liss, K. D., Stark, A., Bartels, A., Clemens, H., Buslaps, T., Phelan, D., Yeoh, L. A. (2008). Directional atomic rearrangements during transformations between the α- and γ- phases in titanium aluminides. Advanced Engineering Materials, 10(4), 389-392. doi:10.1002/adem.200700322