The role of twinning deformation on the hardening response of polycrystalline magnesium from discrete dislocation dynamics simulations

H Fan, S Aubry, A Arsenlis, JA El-Awady - Acta Materialia, 2015 - Elsevier
The deformation of micro-twinned polycrystalline magnesium (Mg) was studied using three-
dimensional discrete dislocation dynamics (DDD). A systematic interaction model between …

Pattern formation in a minimal model of continuum dislocation plasticity

S Sandfeld, M Zaiser - … and Simulation in Materials Science and …, 2015 - iopscience.iop.org
The spontaneous emergence of heterogeneous dislocation patterns is a conspicuous
feature of plastic deformation and strain hardening of crystalline solids. Despite long …

[HTML][HTML] Recovery of strain-hardening rate in Ni-Si alloys

CL Yang, ZJ Zhang, T Cai, P Zhang, ZF Zhang - Scientific reports, 2015 - nature.com
In this study, the recovery of strain-hardening rate (RSHR) was discovered for the first time in
polycrystalline materials (Ni-Si alloys) that have only dislocation activities during tensile test …

Screw dislocation cross slip at cross-slip plane jogs and screw dipole annihilation in FCC Cu and Ni investigated via atomistic simulations

SI Rao, DM Dimiduk, JA El-Awady, TA Parthasarathy… - Acta Materialia, 2015 - Elsevier
Using atomistic simulations, the effect of jogs on the cross-slip of screw character
dislocations and screw-dipole annihilation was examined for both FCC Cu and Ni. The …

Discerning enhanced dislocation plasticity in hydrogen-charged α-iron nano-crystals

M Wagih, Y Tang, T Hatem… - Materials Research …, 2015 - Taylor & Francis
Novel atomistic simulations of α-iron nano-crystals starting with pre-existing dislocation
networks have been performed to identify the effect of high hydrogen concentrations on …

Size effects on strength in the transition from single-to-polycrystalline behavior

P Ghosh, AH Chokshi - Metallurgical and Materials Transactions A, 2015 - Springer
During the transition from single crystalline to polycrystalline behavior, the available data
show the strength increasing or decreasing as the number of grains in a cross section is …

[PDF][PDF] Dislocation Microstructure and Surface Roughness Evolution in Single and Multi-phase Microcrystals

AM Hussein - 2015 - jscholarship.library.jhu.edu
A better understanding of the plastic deformation of metallic materials and their failure can
greatly accelerate future material development. However, attaining such an understanding is …

The effect of microstructure on bendability of ultra-high strength steels

M Liimatainen - 2015 - trepo.tuni.fi
In recent years there has been an increasing interest to utilize ultra-high strength steels
(UHSS) in various industries such as transportation, due to the possibility to produce …