70 citations · 265 across the 9 of their papers we have counts for
10 papers
A unified framework for polycrystal plasticity with grain boundary evolution
Nikhil Chandra Admal, Giacomo Po, Jaime Marian
Plastic deformation in polycrystals is governed by the interplay between intra-granular slip and grain boundary-mediated plasticity. However, while the role played by bulk dislocat…
Diffuse-interface polycrystal plasticity: Expressing grain boundaries as geometrically necessary dislocations
Nikhil Chandra Admal, Giacomo Po, Jaime Marian
The standard way of modeling plasticity in polycrystals is by using the crystal plasticity model for single crystals in each grain, and imposing suitable traction and slip boundary…
A phenomenological dislocation mobility law for bcc metals
Giacomo Po, Yinan Cui, David Rivera +4
Dislocation motion in body centered cubic (bcc) metals displays a number of specific features that result in a strong temperature dependence of the flow stress, and in shear deform…
The atomistic representation of first strain-gradient elastic tensors
Nikhil Chandra Admal, Jaime Marian, Giacomo Po
We derive the atomistic representations of the elastic tensors appearing in the linearized theory of first strain-gradient elasticity for an arbitrary multi-lattice. In addition to…
The role of interstitial binding in radiation induced segregation in W-Re alloys
Leili Gharaee, Jaime Marian, Paul Erhart
Due to their high strength and advantageous high-temperature properties, tungsten-based alloys are being considered as plasma-facing candidate materials in fusion devices. Under ne…
A Generalized Ising Model for studying Alloy Evolution under Irradiation and its use in Kinetic Monte Carlo Simulations
Chen-Hsi Huang, Jaime Marian
We derive an Ising Hamiltonian for kinetic simulations involving interstitial and vacancy defects in binary alloys. Our model, which we term `ABVI', incorporates solute transport b…
Formation of Nanotwin Networks during High-Temperature Crystallization of Amorphous Germanium
Luis A. Sandoval, Celia Reina, Jaime Marian
Germanium is an extremely important material used for numerous functional applications in many fields of nanotechnology. In this paper, we study the crystallization of amorphous Ge…
Free energy generalization of the Peierls potential in iron
Mark Gilbert, Paul Schuck, Babak Sadigh +1
In body-centered cubic (bcc) crystals, screw dislocations exhibit high intrinsic lattice friction as a consequence of their non-planar core structure, which results in…
Thermodynamic and mechanical properties of copper precipitates in alpha-iron from atomistic simulations
Paul Erhart, Jaime Marian, Babak Sadigh
The Fe-Cu system has attracted much attention over the last several decades due to its technological importance as a model alloy for Cu steels. In spite of these efforts several as…
Assessment of interatomic potentials for atomistic analysis of static and dynamic properties of screw dislocations in W
David Cereceda, J. Manuel Perlado, Alexander Stukowski +4
Screw dislocations in bcc metals display non-planar cores at zero temperature which result in high lattice friction and thermally activated strain rate behavior. In bcc W, electron…