Roll Bonding of Steel Net-Reinforced Aluminium Strips

Abstract

The present study is dedicated to the experimental determination of strain parameters at rolling of aluminium matrix with inserted wire netting. Two types of stainless steel fabric netting with different orientation to the rolling axis were placed between two aluminium strips and hot rolled. The rolling temperature and reduction were varied to achieve the sound bonding between the matrix layers and steel net. During the study, the following main investigations were made: strain on areas of longitudinal and transverse cross sections of the composite was measured; stretching and ovalization of net wiring and changes in the net cell angles were determined; mechanical properties of composites along the rolling direction were tested. The experiments were summarized by following contradiction: the contact pressure, required for the bonding of aluminium layers, produces extreme tensile strain on the inserted wires, reducing the mechanical properties of the reinforcing net and, consequently, reducing the properties of the entire composite. Strips with diagonally oriented reinforcing net showed the best results in the longitudinal tension tests.

Failure mode of reinforcing steel mesh in aluminum roll bonded composite material

“…Conclusions. Failure mode of wire mesh inlet observed in this paper corresponds to that described in previous works by authors [5][6][7]. Mesh is fractured at zones of wires intersection as a result of intensified deformation of wires in these zones.…”

“…In all cases regardless to reduction magnitude the destruction of mesh inlets was observed. The failure mode of wire mesh inlets observed in this research corresponds to that one described by previous authors [4][5][6][7]. The fracture is located at the zones of wires intersection as presented in the figure 3 (a).…”

“…The fracture is located at the zones of wires intersection as presented in the figure 3 (a). Excessive stress at these zones caused by the mutual reduction of overlayed wires and elongation of the whole composite leads to the crack appearance and destruction in this zone [5][6][7]. At the same time, the failure mode of expanded sheet inlet is presented in figure 3 (b).…”

“…Huang Теорія і практика металургії [7]. In all above-mentioned papers authors reported about significant rise of mechanical properties of composites due to application of wire mesh such as fracture toughness [2][3] and tensile strength [3][4][5][6][7]. Among all mentioned processes, for aluminum matrix, roll bonding seems to be the most perspective, since it allows much higher rate of manufacturing, it is simple to control the technology and there is no constrains in length of the product.…”

“…Application of strong inner core inside the soft metal matrix leads to sufficient rise of stress concentration in this hard material as a result of relatively high deformation plastic deformation magnitude of soft matrix [5][6][7][8]. Application of woven wire mesh as an internal core during roll bonding leads to appearance of zones with significantly intensified stress and strain at the location of wires intersection, this leads to possible fracture of wires during the manufacturing process [4][5][6][7]. In order to solve this problem, in this research it is decided to use expanded mesh instead of the woven one.…”