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Twinning-dominated nucleation, propagation and deflection of crack in molybdenum characterized with in situ transmission electron microscopy

Identifieur interne : 004D62 ( Main/Exploration ); précédent : 004D61; suivant : 004D63

Twinning-dominated nucleation, propagation and deflection of crack in molybdenum characterized with in situ transmission electron microscopy

Auteurs : L. Liu [République populaire de Chine] ; H. C. Wu [République populaire de Chine] ; J. Wang [États-Unis] ; S. K. Gong [République populaire de Chine] ; S. X. Mao [États-Unis]

Source :

Philosophical magazine letters [ 0950-0839 ] ; 2014.

RBID : Pascal:14-0164558

Descripteurs français

Pascal (Inist)
- Maclage, Nucléation, Fissure superficielle, Molybdène, Microscopie électronique transmission, Microstructure, Morphologie, Plan cristallographique, Macle, Défaut cristallin, Fissuration, Propriété mécanique, Propagation fissure, Couche mince, 6460Q, 6860B, 6220M, 4335N.
Wicri :
- topic : Molybdène.

English descriptors

KwdEn :
- Crack propagation, Cracking, Crystal defects, Crystal twin, Crystallographic plane, Mechanical properties, Microstructure, Molybdenum, Morphology, Nucleation, Surface cracks, Thin films, Transmission electron microscopy, Twinning.

Abstract

Using in situ transmission electron microscopy, we have observed nucleation, propagation and deflection of cracks in a molybdenum thin film. According to characterization by high-resolution transmission electron microscopy, the crack surfaces have a zigzag morphology and are parallel to the {112} twinning planes that correspond to different twin variants. {112} de-twinning in association with cracking is also suggested. These observations demonstrate a twin-crack relation whereby (a) twins nucleate cracks and define a preferred cracking path and (b) a propagating crack facilitates twinning.

Affiliations:

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Le document en format XML

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<term>Microstructure</term>
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<front><div type="abstract" xml:lang="en">Using in situ transmission electron microscopy, we have observed nucleation, propagation and deflection of cracks in a molybdenum thin film. According to characterization by high-resolution transmission electron microscopy, the crack surfaces have a zigzag morphology and are parallel to the {112} twinning planes that correspond to different twin variants. {112} de-twinning in association with cracking is also suggested. These observations demonstrate a twin-crack relation whereby (a) twins nucleate cracks and define a preferred cracking path and (b) a propagating crack facilitates twinning.</div>
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Twinning-dominated nucleation, propagation and deflection of crack in molybdenum characterized with in situ transmission electron microscopy

Twinning-dominated nucleation, propagation and deflection of crack in molybdenum characterized with in situ transmission electron microscopy

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri