A Quantitative Investigation of Dislocation Density in an Al Matrix Composite Produced by a Combination of Micro-/Macro-Rolling

An aluminum matrix composite with dispersed carbon nanotubes (CNTs) was produced via flake powder metallurgy using a micro-rolling process and vacuum hot pressing (VHP), followed by conventional rolling macro-rolling process. The microstructure mechanical properties of the composites were studied. In addition, new quantitative model introduced to study dislocation density based on microstructural parameters. results revealed that distribution characteristics CNTs in Al Al-CNT interfaces two main governing parameters density. Moreover, dependence geometry grains crystallographic texture shown this model. evolution lamellar grain structure had been achieved, high capacity for storage dislocation. A uniform bonding quality also seen final microstructure.