In this paper we propose a rigorous and elegant framework for texture image segmentation relying on region-based active contours (RBAC), shape derivative tools and multiscale geometrical texture representations. After transforming the texture in a dictionary of appropriate waveforms (atoms), the obtained transform coefficients are intended to efficiently capture the essential spectral and geome...

The evolution of the crystallographic texture in lowcarbon steels from a deformed state to a full recrystallization (RX) state upon annealing is an issue with both academic and practical importance.1–4) Normally, the dominant components in the cold-rolled (CR) texture, {hkl}<110> , vanish after RX. Conversely, the RX texture, consisting of varying intensities of {001}, {111} and {011}...

Abstract: Efforts have been carried out in order to use microsilica to develop a forsterite bond rather than other types of binders in the basic refractory castables. According to the higher drying rate and sinterability of colloidal silica, it has been proposed in the recent years. In the present work, effects of replacement of microsilica by colloidal silica evolution of forsterite bond have ...

The application of magnesium alloys is greatly limited because of their relatively low strength and ductility. An effective way to improve the mechanical properties of magnesium alloy is to refine the grains. As the race for better materials performance is never ending, attempts to develop viable techniques for microstructure refinement continue. Further refining of grain size requires, however...

The development of a twinned microstructure in hexagonal close-packed rolled magnesium compressed in the in-plane direction has been monitored in situ with neutron diffraction. The continuous conversion of the parent to daughter microstructure is tracked through the variation of diffraction peak intensities corresponding to each. Approximately 80% of the parent microstructure twins by 8% compre...

Crystallographic textures in a CoCrPtTa/Cr/NiAl multilayer magnetic recording media were studied by electron diffraction. It was found that texture quality evolves through the thickness of the films. A large improvement of texture quality was discovered at the interface of the Cr and NiAl layers. Surprisingly, there remains a portion of randomly oriented grains in the CoCrPtTa layer, in additio...

Ductile fracture modeling still has to be improved at the macro and microscales. New numerical methods are applied to the limit analysis of cells containing one or several voids or void clusters. The results are compared with existing macroscopic models. Voids can also be introduced in analytical polycrystalline models, in order to combine plastic anisotropy and texture evolution with ductile f...

We consider the free matter of global textures within the framework of the perfect fluid approximation in general relativity. We examine thermodynamical properties of texture matter in comparison with radiation fluid and bubble matter. Then we study dynamics of thin-wall selfgravitating texture objects, and show that classical motion can be elliptical (finite), parabolical or hyperbolical. It i...

Experimental investigations of the thermomechanical processing (TMP) metals clearly demonstrate that technological process-tuning parameters have a great influence on evolution both microstructure and texture, which determine chemical, physical, mechanical properties [...]