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Recrystallization during isothermal annealing is studied in a twin-roll cast Al-Mn-Fe-Si alloy with Zr addition. Al₃Zr precipitates, which are known to improve the recrystallization resistance by exerting the Zener drag on migrating grain boundaries, form during heat treatment at 450°C. Materials with and without Al₃Zr precipitates are subjected to 4 passes of equal channel angular pressing at room...
This work presents some recent results on the 3C-SiC structural defects, studied by transmission electron microscopy. The samples were grown in several laboratories, using different methods. There has always been special attention to the region close to the interface between the seed and the overgrown material. This is due to the fact that this region is very important to the evolution of defects...
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