Results 221 to 230 of about 24,070 (256)

Impact of grain boundary character on grain rotation

Acta Materialia, 2014
Abstract The capillarity-driven shrinkage of isolated cylindrical grains with structurally different grain boundaries in aluminum was studied by molecular dynamics simulations. Three pairs of grains with 〈1 0 0〉 tilt and mixed tilt–twist boundaries with the misorientation angles θ0 = 5.45°, 16.26° and 22.61° were examined.
Dmitri Molodov
exaly   +2 more sources

Grain boundary migration and grain rotation studied by molecular dynamics

Acta Materialia, 2012
Abstract We report on molecular dynamics simulations of an isolated cylindrical grain in copper shrinking under capillary forces. At low temperatures, the coupling between grain boundary (GB) migration and grain translation induces rotation of the grain towards higher or lower misorientation angles, depending on the initial misorientation.
Yuri Mishin
exaly   +2 more sources

Coupling between grain growth and grain rotation

Applied Physics Letters, 2007
Grain boundary motion during grain growth or recrystallization is considered as a diffusion process of atomic movement across the boundary. It can be accompanied by subgrain rotation or nanograin rotation. However, grain boundary migration can be achieved also by dislocation motion or creep.
Rath, B., Winning, M., Li, J.
openaire   +2 more sources

Grain Boundary Rotations in Solids

Physical Review Letters, 2012
A new physical mechanism of plastic flow in solids is suggested and theoretically described. The mechanism represents stress-driven rotations of grain boundaries (GBs) in subsurface areas of solids. The stress and energy characteristics of the GB rotations are calculated.
S V, Bobylev, I A, Ovid'ko
openaire   +2 more sources

Grain rotation in Ni3Al

Scripta Materialia, 1996
Abstract The effect of pre-strain on grain rotation and GBCD in polycrystalline Ni3Al was investigated and the following conclusions were reached. 1. (1) The frequency of coincidence boundaries does not increase by the grain rotation. 2. (2) Pre-strain enhances the grain rotation but does not affect the frequency of coincidence boundaries.
T. Shibayanagi, K. Sumimoto, Y. Umakoshi
openaire   +1 more source

Scaling Behavior of Grain-Rotation-Induced Grain Growth

Physical Review Letters, 2002
Recent investigations of grain growth in nanocrystalline materials have revealed a new growth mechanism: grain-rotation-induced grain coalescence. Based on a simple model employing a stochastic theory and using computer simulations, here we investigate the coarsening of a polycrystalline microstructure due solely to the grain-rotation coalescence ...
Moldovan, D., Yamakov, V., Wolf, D., Phillpot, S. R.   +3 more
openaire   +3 more sources

Flow of magnetized grains in a rotating drum

Physical Review E, 2010
We have experimentally investigated the influence of a magnetic interaction between the grains on the flow of a granular material in a rotating drum. The magnetic cohesion is induced by applying a homogeneous external magnetic field B oriented either parallel or perpendicular to the gravity g.
Lumay, Geoffroy, Vandewalle, Nicolas
openaire   +2 more sources

Granular micromechanics based continuum model for grain rotations and grain rotation waves

Journal of the Mechanics and Physics of Solids, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Poorsolhjouy, Payam, Misra, Anil
openaire   +2 more sources

The rotation of magnetic grains

Tectonophysics, 1993
Abstract It has been questioned whether magnetic remanence rotates as a rigid marker or as a passive marker (with no material properties) during tectonic strain. The remanence of a rock is actually the sum of the moments of individual grains, so we must first understand their rotation.
openaire   +1 more source

Grain Rotation and Grain Boundary Selection in Thin Films

MRS Proceedings, 1996
ABSTRACTComputer simulations of the phenomenon of grain rotation in polycrystalline <111> textured films have been carried out. These simulations provide insight into the evolution of film microstructure due to grain rotation. It is found that grain rotation diminishes with annealing time and stops almost completely when a metastable equilibrium ...
Varun Singh, Alexander H. King
openaire   +1 more source