Determination of the deformation parameters of the steel reinforcing phase inside the aluminum matrix during hot rolling

Abstract

Purpose. Comparison of deformation parameters during rolling of reinforced composites based on aluminum alloy using braided and expanded steel meshes as a reinforcing phase. Methodology. An experimental study on the effect of pressure on the deformation of the reinforcing phase during rolling of aluminum composites is carried out. A wire mesh and expanded mesh made of stainless steel was used as a reinforcing phase. The effect of deformation on the change in the lattice angle of the reinforcing phase is investigated. Findings. In this work, experimental data on the parameters of deformation of the wire mesh and expanded mesh are obtained. A comparison is made of the shape change in such grids under hot rolling conditions between two aluminum plates, which play the role of a matrix. It is found that the elongation coefficients of the lattice for the experiment with a wire mesh c is equal to 1.682.3, which is greater than the coefficient of elongation of the lattice in the expanded mesh of 1.552.2. Therefore, expanded sheets make the best reinforcing layer for aluminum-based composites produced by the roll-bonding process. Expanded mesh also reduces the risk of rupture at the intersection of wires. Originality. In the work, for the first time, a comparison of the deformation parameters during roll bonding of composites based on an aluminum alloy, reinforced with a braided and expanded steel mesh, has been given. Obtaining composite materials by means of hot roll bonding requires an understanding of the flow of composite components during deformation and their influence on each other. These peculiarities have not been studied sufficiently. Currently, there is no reliable method for predicting the behavior of the material of a solid reinforcing phase of various shapes inside a composite. Practical value. Advantages of using an expanded steel mesh for reinforcing aluminum-based composites have been confirmed. Scientific results can be used to refine calculating methods for metal flow at high hydrostatic pressure with variable components of the stress tensor and the major stresses.

Patterning of Surfaces for Subsequent Roll Bonding in a Low-Oxygen Environment Using Deformable Mesh Inlays

“…Challenges include localized work hardening, an increase in the oxidized surface area, a need for special rolls and the generation of thickness inhomogeneities. However, applying an oxygen-free environment [19] during the roll bonding removes one of these obstacles, and the use of a steel mesh [20] as a patterning tool between the surfaces to be subsequently bonded removes another. Here, quantitative data about the distortion of the mesh geometry under tensile stress in the deformation zone are of particular interest in understanding the behavior of the inlay in the rolling plane.…”