Recent progress in the phase-field dislocation dynamics method
S Xu - Computational Materials Science, 2022 - Elsevier
The phase-field dislocation dynamics (PFDD) method, originated in 2002, is a continuum
dislocation model that uses order parameters to describe dislocation slips in crystalline …
dislocation model that uses order parameters to describe dislocation slips in crystalline …
The effect of local chemical ordering on Frank-Read source activation in a refractory multi-principal element alloy
In this work, we investigate the operation of Frank-Read (FR) sources in a refractory multi-
principal element alloy (MPEA). Simulations of discrete dislocation motion in MPEAs is …
principal element alloy (MPEA). Simulations of discrete dislocation motion in MPEAs is …
Modelling of dislocations, twins and crack-tips in HCP and BCC Ti
Ti exhibits complex plastic deformation controlled by active dislocation and twinning
systems. Understandings on dislocation cores and twin interfaces are currently not complete …
systems. Understandings on dislocation cores and twin interfaces are currently not complete …
[HTML][HTML] Improved microstructure and mechanical properties of friction stir-welded AZ61 Mg alloy joint
N Xu, Z Ren, Z Lu, J Shen, Q Song, J Zhao… - Journal of Materials …, 2022 - Elsevier
Friction stir welding (FSW) is a common and effective technology used to join metals or
alloys of low melting point. However, the FSW Mg alloy joint usually exhibits an …
alloys of low melting point. However, the FSW Mg alloy joint usually exhibits an …
Comparative modeling of the disregistry and Peierls stress for dissociated edge and screw dislocations in Al
Many elementary deformation processes in metals involve the motion of dislocations. The
planes of glide and specific processes dislocations prefer depend heavily on their atomic …
planes of glide and specific processes dislocations prefer depend heavily on their atomic …
Phase-field modeling of the interactions between an edge dislocation and an array of obstacles
Obstacles, such as voids and precipitates, are prevalent in crystalline materials. They
strengthen crystals by serving as barriers to dislocation glide. In this work, we develop a …
strengthen crystals by serving as barriers to dislocation glide. In this work, we develop a …
Embedding strain-rate sensitivities of multiple deformation mechanisms to predict the behavior of a precipitate-hardened WE43 alloy under a wide range of strain rates
A rare earth Mg alloy, WE43, exhibits high strength, good ductility, low anisotropy, and
moderately high strain rate sensitivity. As such, the alloy is a viable candidate for high strain …
moderately high strain rate sensitivity. As such, the alloy is a viable candidate for high strain …
[HTML][HTML] Thermodynamically-consistent derivation and computation of twinning and fracture in brittle materials by means of phase-field approaches in the finite …
A theoretical-computational framework is proposed for predicting the failure behavior of two
anisotropic brittle materials, namely, single crystal magnesium and boron carbide …
anisotropic brittle materials, namely, single crystal magnesium and boron carbide …
Phase-field dislocation modeling of cross-slip
The phase-field dislocation dynamics (PFDD) model is extended to simulate cross-slip in
body-centered cubic materials. The model makes use of a non-orthogonal, body-centered …
body-centered cubic materials. The model makes use of a non-orthogonal, body-centered …
A combined kinetic Monte Carlo and phase field approach to model thermally activated dislocation motion
In this work, a kinetic Monte Carlo (KMC) scheme is integrated into a phase field dislocation
dynamics (PFDD) model to account for thermal activation. While the implementation is …
dynamics (PFDD) model to account for thermal activation. While the implementation is …