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discrete dislocation dynamics

Jaafar El-Awady's picture

Post-Doctoral Position in Molecular Dynamics Simulations and/or Discrete Dislocation Dynamics Simulations of High Entropy Alloys at Johns Hopkins University

We are soliciting applications from outstanding candidates for a postdoctoral research position in the Computational & Experimental Materials Engineering Laboratory, at the Department of Mechanical Engineering, Johns Hopkins University starting immediately.

The position is available immediately and applications will be reviewed until position is filled. This will be a one year position renewable depending on performance.

yann.charles's picture

PostDoctoral Position - Universities Paris 7 & Paris 13 , Paris, France

A 14 months post Doctoral position is avalaible on mechanical and numerical modeling fields. This is a join project between Univ. Paris 7 (ITODYS lab)  & Paris 13 (LSPM lab).

The present postdoc subject is focussed on dislocation dynamics computation in Al. crystals.

More details in the enclosed pdf description file.

Contacts :
Dr. S. Queyreau (+33) 1 49 40 34 90, sylvain.queyreau(at)lspm.cnrs.fr
Dr. Y. Charles (+33) 1 49 40 34 61, yann.charles(at)univ-paris13.fr
Dr. M. Seydou (+33) 1 57 27 83 38, mahamadou.seydou(at)univ-paris-diderot.fr

Jaafar El-Awady's picture

Pre-straining effects on the power-law scaling of size-dependent strengthening in Ni single crystals

Pre-straining effects on the power-law scaling of size-dependent strengthening in Ni single crystals

Jaafar A. El-Awady, Michael D. Uchic, Paul A. Shade, Sang-Lan Kim, Satish I. Rao, Dennis M. Dimiduk, Christopher Woodward

 

Volume 68, Issues 3–4, February 2013, Pages 207–210

 

Kamyar M Davoudi's picture

Dislocation Climb in Two-Dimensional Discrete Dislocation Dynamics

In this paper, dislocation climb is incorporated in a two-dimensional discrete dislocation dynamics model. Calculations are carried out for polycrystalline thin films, passivated on one or both surfaces. Climb allows dislocations to escape from dislocation pile-ups and reduces the strain-hardening rate, especially for fully passivated films. Within the framework of this model, climb modifies the dislocation structures that develop during plastic deformation and results in the formation of pile-ups on slip planes that do not contain any dislocation sources.

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