Studies on the deformation behaviour of interfaces in (γ + α2) titanium aluminide by high-resolution transmission electron microscopy
- 1 May 1992
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 65 (5) , 233-241
- https://doi.org/10.1080/09500839208207541
Abstract
The deformation behaviour of two-phase (γ + α2) titanium aluminide was investigated by high-resolution transmission electron microscopy. Specimens were deformed in compression at room temperature well beyond the yield point. The α2-Ti3Al lamellae within the γ-TiAl matrix were observed to deform by shearing when intersected by twins. In addition to dislocation slip, plastic deformation in γ-TiAl was found to proceed by (a/6)2 interface. These observations and deformation mechanisms are discussed in terms of the structure of γ-α2 and twin interfaces.Keywords
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