WebJan 10, 1997 · A constitutive model is developed for grain boundary sliding (GBS) at serrated grain boundaries. Based on a previously developed GBS model, using the dynamics of grain boundary dislocation... WebThe grain boundary sliding in polycrystals is not free at high stresses and can be accommodated by creep deformation within grains. In this case the deformation within the grains is non-uniform and high stress and strain are produced at the triple grain junctions.
GRAIN BOUNDARY SLIDING IN ALUMINIUM AND ITS BINARY …
WebOct 2, 2015 · Many grain boundaries are straight or slightly curved, and some lobate grain boundaries are also observed. The distribution of subgrain boundaries and dislocations is inhomogeneous, and larger porphyroclasts having grain sizes larger than 50 μm tend to have lower subgrain boundary densities and lower dislocation densities ( Fig. 1 ). Web12 hours ago · In fact, unusual deformation modes were also found in other ultrafine-grained metal materials because normal dislocation slip becomes difficult to operate due to the scarcity of free dislocations in each recrystallized ultrafine grain, e.g. grain boundary sliding in pure Mg [42], dislocations in an Mg alloy [43], and nano deformation ... boucher hg56
Grain Boundary Sliding - an overview ScienceDirect Topics
WebSince creep deformation occurs by grain-boundary sliding, the more grain boundary area, the easier creep deformation will be. Creep deformation and creep strength are a grain-size sensitive property. Thus a larger … WebOct 1, 1994 · The phenomenon of cooperation of grain boundary sliding (GBS) along the bands of localized shear strain, the interaction of GBS with other deformation mechanisms, and the effect of the scale... WebJul 4, 2016 · Lifshitz [26] explained grain boundary sliding via diffusion of the voids through grain boundary or lattice which leads to grains elongation in the tensile direction. While Rachinger [25] provided a model based on grain displacement without any changes in the grains shape. boucher hermit loop