Deformation Behaviour of Cold-Rolled Ni/CNT Nanocomposites

Metal matrix nanocomposites (MMNCs) reinforced by carbon nanotubes (CNTs) are good candidates to produce structural components in the mobility industry, given their unique properties. The manufacture of these can involve plastic deformation. Therefore, it is crucial understand whether reinforcement influence deformation behaviour nanocomposites. Thus, this work aims study MMNCs, importance and lack studies on topic. Although nickel not most widely used metal as a nanocomposites, presents mechanical properties superior other matrices, such aluminium. In addition, has proven establish strong interface integration nanotubes, making an exciting material for production that sense, 1.00 %vol. CNTs were produced powder metallurgy using ultrasonication dispersion/mixture method. For comparison purposes, was under same conditions. Samples with without cold-rolled thickness reductions between 10 60% (logarithmic strains 0.11 0.92) investigate behaviour. Microstructural characterization performed scanning electron microscopy (SEM) backscattered diffraction (EBSD). Microhardness tests applied evaluate results revealed exhibited softening small (0.11 0.22). This decrease hardness attributed decline dislocation density observed EBSD, due rearrangement annihilation pre-existing dislocations originated during production. A possible inversion explain when minor or trajectory, known Bauschinger effect. difference texture evolution be explained initial crystallographic orientations, which influenced presence CNTs.