Evidence of dislocation cross-slip in MAX phase deformed at high temperature

Antoine Guitton; Anne Joulain; Ludovic Thilly; Christophe Tromas

doi:10.1038/srep06358

Evidence of dislocation cross-slip in MAX phase deformed at high temperature

Sci Rep. 2014 Sep 15:4:6358. doi: 10.1038/srep06358.

Authors

Antoine Guitton¹, Anne Joulain¹, Ludovic Thilly¹, Christophe Tromas¹

Affiliation

¹ Pprime Institute - Department of Physics and Mechanics of Materials, UPR 3346, CNRS - University of Poitiers - ISAE-ENSMA, SP2MI, Boulevard Marie et Pierre Curie, BP 30179, 86962 Futuroscope Chasseneuil Cedex, France.

Abstract

Ti₂AlN nanolayered ternary alloy has been plastically deformed under confining pressure at 900°C. The dislocation configurations of the deformed material have been analyzed by transmission electron microscopy. The results show a drastic evolution compared to the dislocation configurations observed in the Ti₂AlN samples deformed at room temperature. In particular, they evidence out-of-basal-plane dislocations and interactions. Moreover numerous cross-slip events from basal plane to prismatic or pyramidal planes are observed. These original results are discussed in the context of the Brittle-to-Ductile Transition of the nanolayered ternary alloys.