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


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.

SUBMITTER: Guitton A 

PROVIDER: S-EPMC4163670 | biostudies-other | 2014

REPOSITORIES: biostudies-other

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