Dislocation analysis of Ti2AlN deformed at room temperature under confining pressure

Compression experiments of the brittle MAX phase Ti 2 AlN were performed under confining gas pressure at room temperature. Subsequently, a complete dislocation analysis was performed by transmission electron microscopy. In particular, the Burgers vectors and the dislocation lines were studied via th...

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Bibliographic Details
Published in:Philosophical magazine (Abingdon, England) England), 2012-12, Vol.92 (36), p.4536-4546
Main Authors: Guitton, Antoine, Joulain, Anne, Thilly, Ludovic, Tromas, Christophe
Format: Article
Language:English
Subjects:
AlN
Condensed Matter
Condensed matter: structure, mechanical and thermal properties
Defects and impurities in crystals
microstructure
Deformation and plasticity (including yield, ductility, and superplasticity)
dislocations
Engineering Sciences
Exact sciences and technology
Linear defects: dislocations, disclinations
Materials
Materials and structures in mechanics
MAX phases
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Mechanics
Physics
plasticity
Structure of solids and liquids
crystallography
transmission electron microscopy
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Summary:Compression experiments of the brittle MAX phase Ti 2 AlN were performed under confining gas pressure at room temperature. Subsequently, a complete dislocation analysis was performed by transmission electron microscopy. In particular, the Burgers vectors and the dislocation lines were studied via the weak beam technique: dislocation reactions are reported for the first time in a MAX phase, as well as dipole interactions. Footprints of a high lattice friction were also observed. All these features point towards classical dislocation activity, eventually leading to hardening.
ISSN:1478-6435
1478-6443
1478-6433
DOI:10.1080/14786435.2012.715250