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To flake aluminum powder and strengthen the B 4 Cp/Al composite, pure aluminum powder is natural oxidized and ball milled. The effect of shear deformation on mechanical properties of the forged B 4 Cp/Al composite with flaked Al are studied. The results show that ball milling can flake the pure aluminum powder, reduce grain size of aluminum, and increase the volume fraction of Al 2 O 3  on the surface of the flaked aluminum. The forging helps to refine the grain size of aluminum. The flow of aluminum matrix is helpful to the uniform distribution of the B 4 C particles. Shear deformation can refine grain size and also can break the Al 2 O 3  layer, with the increment of strength, hardness, and relative density. After shear deformation, the ultimate tensile strength of the B 4 Cp/Al composite is 157.0 MPa.

Effects of shear deformation on grain size and mechanical properties of the forged B 4 Cp/Al composite