Concept

Burgers vector

Related publications (103)

Hydrogen–vacancy–dislocation interactions in α-Fe

Atomistic simulations of the interactions between dislocations, hydrogen atoms, and vacancies are studied to assess the viability of a recently proposed mechanism for the formation of nanoscale voids in Fe-based steels in the presence of hydrogen. Quantum- ...

Institute of Physics2016

Exciton dynamics at a single dislocation in GaN probed by picosecond time-resolved cathodoluminescence

Nicolas Grandjean, Jean-François Carlin, Benoît Marie Joseph Deveaud, Gwénolé Jean Jacopin, Wei Liu

We investigate the dynamics of donor bound excitons (D degrees X-A) at T = 10K around an isolated single edge dislocation in homoepitaxial GaN, using a picosecond time-resolved cathodoluminescence (TR-CL) setup with high temporal and spatial resolutions. A ...

Amer Inst Physics2016

Angular distortive matrices of phase transitions in the fcc-bcc-hcp system

Cyril Cayron

This work generalizes the one-step model previously developed on fcc-bcc martensitic transformations to the larger family of phase transitions in the fcc-bcc-hcp system. The angular distortive matrices are calculated for the bcc-fcc, bcc-hcp and fcc-hcp tr ...

Elsevier2016

Coupled 3D dislocation dynamics at nano- and micro-scales

Jean-François Molinari, Guillaume Anciaux, Jaehyun Cho

Dislocation dynamics are important to understand material plasticity effects, e.g. size dependent strain hardening. Dislocations are nucleated at nano-scale, and interact with other defects including grain boundaries and other dislocations at micro-scale. ...

2016

Obstacle strength of binary junction due to dislocation dipole formation: An in-situ transmission electron microscopy study

Seyed Masood Hafez Haghighat

We report the experimental observation of the 1/2 < 111 > edge dislocation dipole formation and annihilation in ultra-high purity Fe using transmission electron microscopy (TEM) in-situ straining. The observation is confirmed by TEM image simulations. The ...

Elsevier Science Bv2015

Analysis of spurious image forces in atomistic simulations of dislocations

William Curtin, Benjamin Alexander Szajewski

Molecular dynamics simulations of dislocation/obstacle interactions are enhancing our physical understanding of plasticity. However, despite increasing computational power, the interaction between simulation cell boundaries and the long ranged fields of di ...

Institute of Physics2015

Cast aluminium microwires

Jérôme Krebs

Plasticity size effects have been the focus of strong recent interest due to the miniaturization of devices such as actuators and different medical apparatuses. Devices with a sub-micrometre dimension have a high market potential and therefore a thorough u ...

EPFL2015

Magnesium interatomic potential for simulating plasticity and fracture phenomena

William Curtin, Michael Frederick Francis

Magnesium has multiple dislocation and twinning systems with starkly different properties, which make its plastic deformation strongly anisotropic and highly complex. Existing empirical interatomic potentials fail to capture the full scope of these propert ...

Institute of Physics2015

Parallel algorithm for multiscale atomistic/continuum simulations using LAMMPS

William Curtin, Fabio Pavia

Deformation and fracture processes in engineering materials often require simultaneous descriptions over a range of length and time scales, with each scale using a different computational technique. Here we present a high-performance parallel 3D computing ...

Iop Publishing Ltd2015

Continuous atomic displacements and lattice distortion during fcc–bcc martensitic transformation

Cyril Cayron

The continuous matrices of atomic displacements and lattice distortion from face-centered-cubic (fcc) to body-centered-cubic (bcc) phases compatible with the hard-sphere geometry of iron atoms are calculated for different possible final orientation relatio ...

Elsevier2015

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