Effect of Grain Size on the Properties of Aluminum Matrix Composites with Graphene

The structure and mechanical properties of composites consisting a metal matrix based on aluminum its alloys different compositions (AA-3003 AA-5154) graphene synthes sized in situ under layer molten salts were investigated depending the chemical composition grain size matrix. Aluminum three studied as-cast coarse-grained, deformed fine-grained (grain < 1 mm), sub microcrystalline μm) states order to compare structural characteristics with sizes. subjected deformation split Hopkinson (Kolsky) bar dynamic-channel angular pressing. hardness dynamic measured at strain rates ε˙ from 1.8 − 4.7 × 103 1.6 2.4 105 s−1. It was found that refinement induced sharp increase various (by factor 1.6–2.6). A correlation elastic-plastic sizes matrices established. transition coarse-grained shown improve average by 1.5. proved reinforcing effect increased decreasing Mechanisms reinforcement using proposed.