Influence of Modification of the Surface of a Metal Matrix on the Mechanical Properties of Layered Composites “Aluminum/Carbon Fiber” and Silumin/Carbon Fiber

Abstract

The paper presents the results of a study of the effect of irradiation of the surface of a hypoeutectic silumin with a pulsed electron beam on the mechanical properties of the material. Silumin grade AK5M2 (Al–(4.0–6.0)Si–1.3Fe–0.5Mn–0.5Ni–0.2Ti–2.3Cu–0.8Mg–1.5Zn) was used as the research material. To carry out uniaxial tensile deformation, two-sided proportional samples with heads were made. The results of studying the evolution of deformation fields of layered composites silumin/CFRP for uniaxial tension based on irradiated silumin are also presented. The carbon fiber is made of a filler – carbon unidirectional fabric FibARM Tape-230 – and a binder – a two-component epoxy compound FibARM Resin 530. The fracture surface of the samples was studied using scanning electron microscopy techniques. The dependences of the maximum and minimum values of strains in the localizers on the sample surface on the averaged strains over the working area of the sample are plotted. An increase (relative to silumin in the initial state) in the strength and plastic properties of both samples of irradiated silumin and of the silumin/CFRP composite was determined. A sawtooth character of the deformation curve of uniaxial tension of the composite material silumin/carbon fiber with a pre-irradiated surface of the silumin plate is revealed.