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The influence of nanoscale reinforcement on the mechanical behavior of ultrafine-grained composites was studied. Al 5083 (Al–4.5Mg–0.57Mn–0.25Fe) composites, with grain size of 115nm and B 4 C reinforcement size of 38nm, were fabricated via cryomilling and consolidation. The result reveals that the presence of nanoparticles enhances strength by interacting with dislocations, while simultaneously...
In a compact that was hot isostatic pressed (HIPped) using nanostructured Al-5083/SiC p composite powder prepared by cryomilling, coarse-grained (reinforcement-free) inter-particle regions were observed. These coarse-grained regions formed via elemental diffusion towards the inter-particle pores during the HIPping process. This finding can well explain the bimodal grain-size distribution reported...
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