Three-Point Bending Behavior of Aluminum Foam Sandwich with Different Interface Bonding Methods

Abstract

The interface bonding method has a great influence on the mechanical properties of aluminum foam sandwich (AFS). This study aims to investigate the effect of different interface bonding methods on the mechanical properties of AFS. In this paper, the metallurgical-bonding interface-formation mechanism of AFS prepared by powder metallurgy was investigated. The shear properties of metallurgical-bonded AFS were determined by the panel peeling test. The flexural properties and energy absorption of metallurgical-bonded and glued AFS were analyzed through the three-point bending test. The results show that the magnesium, silicon, and copper elements of the core layer diffuse to panels and form a metallurgical composite layer. The metallurgical-bonding strength between the panel and core layer is higher than that of the foam core layer. The peak load of metallurgically-bonded AFS is 24% more than that of glued AFS, and energy absorption is 12.2 times higher than that of glued AFS.

Fatigue of an Aluminum Foam Sandwich Formed by Powder Metallurgy

“…The dark area was the aluminum alloy panel, the bright area was the core layer area, and the boundary between the bright and dark area was a straight line with a flat interface and no obvious defects. Huang et al [ 27 ] explored the microstructure of an AFS made by the powder metallurgy method and found the same metal elements at the bonding interface and near the cell wall. Si, Cu, and Mg elements of the core layer diffused to the metal panel.…”

“…In order to improve the decomposition temperature of the blowing agent TiH 2 and ensure that the decomposition temperature of TiH 2 matched the melting temperature of the core powder, the TiH 2 should be pre-oxidized. The temperature was 470 °C and the time was 1.5 h [ 27 ]. The mixed powder was sealed in the cavity of the aluminum alloy, which was made of the aluminum alloy 3003 with a thickness of 4 mm.…”

Investigation of the Indentation Resistance of Aluminum Foam Sandwich Panels with Metallurgical Bonding Interfaces under Low-Velocity Impact

“…Compared with Figure 3 a, a large number of monolithic powder particles were alloyed at high temperatures. Huang et al [ 13 ] studied the microstructure of this composition, and the results exhibited that the core layer aluminum matrix is mainly composed of alloying phases such as Mg 2 Si, Al 2 Cu, eutectic silicon, and Al 4 Cu 2 Mg 8 Si 7 . Moreover, the diffusion of elements such as Al, Si, Mg, and Cu from the core layer to the panel occurred.…”

“…With the increasing demand for highly stable interfaces and large-size sandwich structures, Zu et al [ 11 , 12 ] developed the powder cladding rolling technology, which is proven to meet the needs of large-size products for industrial applications. The AFS with metallurgical bonding interfaces possesses high interfacial stability and interfacial bonding strength of the panel/foam core [ 13 ]. In addition, the AFS precursors can also be molded into complex parts before foaming, which is usually difficult to achieve through the adhesive bonding process [ 14 ].…”

Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization

“…Aluminum foam sandwich panels (AFS) belong to an innovative category of porous composite materials renowned for their exceptional physical attributes [1]. These properties encompass a lightweight design, high specific stiffness and strength [2], proficient energy absorption [3,4], effective sound insulation capabilities [5,6], and adept electromagnetic shielding [7]. The applications span aerospace and transportation sectors, where lightweight designs are crucial [8], urban construction for creating noise-reducing structures, and the military industry, where AFS serves in energy-absorbing components for armored vehicle chassis [9].…”