The results show that by controlling some parameters in the spatial distribution of the microstructure with regions composed of micro-grains and nano-grains one can achieve improved strength and ductility.
Micro grains with high dislocation densities co-exist next to micro grains without dislocations.
Results revealed that, shear bands were formed in the nitrided layer of micro grain substrate unlike nano-grain substrate because of instability of the austenitic micro grains.
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Furthermore, studies revealed that, the austenite phase was indicated on the nanostructured surface layer while the martensite phase was indicated on the micro grain one after plasma nitriding at 500 °C.
CeO2 plays important roles in reducing micro-porosities, refining grains, and improving the precipitation of NbC.
In this study, multi-modal Zr metals composed of nano-grains (NG), ultrafine-grains (UFG) and micro-grains (CG) with various size distributions have been produced via cryorolling followed by thermal annealing.
It is conceivable that the inelastic deformation is attributable to micro-deformations that consist of slip between micro-lamellae within individual grains and the formation of microcracks between grains.
Bimodal Co distribution as micro-grains on a background of nano-grains and co-nulcleation of PPy and Co is evidenced by correlation of Co and N XRF maps.
Their nested structure, where meso-grains are recursively composed of smaller and smaller micro-grains at the different scales with a fractal-like topology, is herein studied from a hierarchical perspective.
The subsequent reaction between the product of the thermal decomposition, micro-grains of sodium carbonate (Na2CO3) and SO2 is considered in the reaction path by the use of a pore plugging model.
