How to determine limiting velocities of dislocations in anisotropic crystals
In the continuum limit, the theory of dislocations in crystals predicts a divergence in the
elastic energy of the host material at a crystal geometry dependent limiting (or critical) …
elastic energy of the host material at a crystal geometry dependent limiting (or critical) …
Mechanism-informed constitutive modeling of molecular crystal cyclotetramethylene tetranitramine (β-HMX)
Molecular crystals are of importance in many applications including energetic materials and
pharmaceuticals. Here we focus on the energetic material cyclotetramethylene …
pharmaceuticals. Here we focus on the energetic material cyclotetramethylene …
[HTML][HTML] Atomistic evaluation of the dislocation transmission across tilt and twist low-angle grain boundaries in body-centered cubic iron
This study systematically and qualitatively evaluates the resistance for dislocation
transmission across tilt/twist low-angle grain boundaries (LAGBs), which mainly consist of …
transmission across tilt/twist low-angle grain boundaries (LAGBs), which mainly consist of …
Dislocation drag from phonon wind in an isotropic crystal at large velocities
The anharmonic interaction and scattering of phonons by a moving dislocation, the photon
wind, imparts a drag force v B (v, T, ρ) on the dislocation. In early studies, the drag coefficient …
wind, imparts a drag force v B (v, T, ρ) on the dislocation. In early studies, the drag coefficient …
Velocity dependent dislocation drag from phonon wind and crystal geometry
The mobility of dislocations is an important factor in understanding material strength.
Dislocations experience a drag due to their interaction with the crystal structure, the …
Dislocations experience a drag due to their interaction with the crystal structure, the …
Analytic model of the remobilization of pinned glide dislocations: Including dislocation drag from phonon wind
In this paper we discuss the effect of a non-constant dislocation drag coefficient on the very
high strain rate regime within an analytic model describing mobile-immobile dislocation …
high strain rate regime within an analytic model describing mobile-immobile dislocation …
Modeling dislocations with arbitrary character angle in face-centered cubic transition metals using the phase-field dislocation dynamics method with full anisotropic …
In this study, we present a phase-field dislocation dynamics (PFDD) method that includes full
anisotropic elasticity. We apply it to calculate the equilibrium core structures of dislocations …
anisotropic elasticity. We apply it to calculate the equilibrium core structures of dislocations …
Elastic constants of pure body-centered cubic Mg in nanolaminates
At ambient temperature, pressure, and sufficiently fine layer thicknesses, pure body-
centered cubic (bcc) Mg can exist as a pseudo-morphic phase when coherently bonded with …
centered cubic (bcc) Mg can exist as a pseudo-morphic phase when coherently bonded with …
[HTML][HTML] Properties of dislocation drag from phonon wind at ambient conditions
It is well known that, under plastic deformation, dislocations are not only created but also
move through the crystal, and their mobility is impeded by their interaction with the crystal …
move through the crystal, and their mobility is impeded by their interaction with the crystal …
[HTML][HTML] Deformation mechanisms and microstructural characteristics of AZ61 magnesium alloys processed by a continuous expansion extrusion approach
The unique continuous extrusion-based severe plastic deformation approaches were
proposed recently to process high-performance magnesium (Mg) alloys, while the in-depth …
proposed recently to process high-performance magnesium (Mg) alloys, while the in-depth …