Concept

Burgers vector

Related publications (103)

Slip in directionally solidified Mo-alloy micropillars - Part I: Nominally dislocation-free pillars

Cécile Hébert, Helena Van Swygenhoven, Emad Oveisi, Steven Van Petegem, Barbora Bártová, Camelia Borca, Cécile Renée Maria Marichal

In situ Laue analysis during microcompression reveals plasticity in [0 0 1]-oriented, directionally solidified Mo alloy pillars to start with slip on the {1 1 2} < 1 1 1 > system having the highest Schmid factor followed by slip on the (1 1 0) plane contai ...

Elsevier2012

Biexciton emission and crystalline quality of ZnO nano-objects

Jean-Philippe Ansermet, Benoît Marie Joseph Deveaud, Pierre Stadelmann, Jean-Daniel Ganière, Pierre Michel Corfdir, Anas Mouti, Elisa Papa

The design of cost-effective standards for the quality of nano-objects is currently a key issue toward their massive use for optoelectronic applications. The observation by photoluminescence of narrow excitonic and biexcitonic emission lines in semiconduct ...

Institute of Physics2011

Defects in a-GaN grown on r-sapphire by hydride vapor phase epitaxy

Nicolas Grandjean, Pierre Stadelmann, Denis Martin, Tiankai Zhu

Non-polar a-GaN films grown on r-sapphire by hydride vapor phase epitaxy (HVPE) are studied using transmission electron microscopy (TEM). Despite the small lattice mismatch in a-GaN ([1 0 (1) over bar 0] similar to 1.1% and [0 00 1] similar to 16%), high d ...

2011

Atomistic simulation of the influence of Cr on the mobility of the edge dislocation in Fe(Cr) alloys

Seyed Masood Hafez Haghighat

In this work Fe-Cr compounds, as model alloys for the ferritic base steels that are considered as main candidates for the structural materials of the future fusion reactors, are studied using molecular dynamics simulations. The Cr or so-called alpha' preci ...

Elsevier2011

Molecular Dynamics Simulations of Helium Atoms Clustering in bcc Iron

Ning Gao

Helium atoms are known to have a significant impact on materials used in fission and fusion reactors. In particular, the presence of helium atoms can change the mechanical properties and degrade the lifetime of reactors. In order to develop the helium-resi ...

EPFL2011

Dislocation shielding of a cohesive crack

William Curtin

Dislocation interaction with a cohesive crack is of increasing importance to computational modelling of crack nucleation/growth and related toughening mechanisms in confined structures and under cyclic fatigue conditions. Here, dislocation shielding of a D ...

2010

Influence of the stress field due to pressurized nanometric He bubbles on the mobility of an edge dislocation in iron

Robin Schäublin, Seyed Masood Hafez Haghighat

Voids and He bubbles are strong obstacles to dislocation, which induce hardening and loss of ductility. In Fe, molecular dynamics simulation is used to investigate the basic mechanisms of the interaction between a moving edge dislocation and a void or He b ...

Taylor & Francis2010

Atomistic study of edge and screw textless c plus a textgreater dislocations in magnesium

William Curtin

The gamma surfaces in the pyramidal I {1 -1 0 1} and II {1 1 -2 2} planes for hexagonal close packed Mg have been calculated using two embedded-atom-method potentials and by ab initio methods, and reasonable agreement is obtained for key stacking fault ene ...

2010

An Atomistic Simulation Method for Oxygen Impurities in Aluminium Based on Variable Charge Molecular Dynamics

Andreas Elsener

Impurities are known to have a significant impact on materials properties. In particular, the presence of impurities can change mechanical properties and stabilize the microstructure by reducing grain growth and recrystallization processes. In the past ato ...

EPFL2010

Strain softening behavior in a particle-containing copper alloy

Mingxing Guo

The strain softening behavior of a particle-containing copper alloy and the associated microstructure changes were investigated as a function of strain rate (epsilon) over dot and analyzed by modeling. It is shown that, increasing strain rate (epsilon) ove ...

2010

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