Effect of SiC particles on hot deformation behavior of closed-cell Al/SiC p composite foams
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(2020) 42:554
TECHNICAL PAPER
Effect of SiC particles on hot deformation behavior of closed‑cell Al/ SiCp composite foams Armin Dehnavi1 · Gholam Reza Ebrahimi2 · Masoud Golestanipour3 Received: 6 May 2020 / Accepted: 15 September 2020 © The Author(s) 2020
Abstract Aluminum foams are one of the best energy absorber materials for various impact protection applications; such as lightweight structural panels, packing materials, and energy-absorbing devices. In the present study, the hot deformation behavior of closed-cell Al/SiCp composite foams was investigated at different contents of SiC particles (3, 6, and 10 vol%) and at various temperatures (100, 200, 300, and 400 °C). High-temperature uniaxial compression tests with constant 0.1 s−1 strain rate were carried out to get the fundamental stress–strain profiles. The results showed that the yield strength, plateau stress, and energy absorption of composite foams increase with increase in the SiC content and decrease with increase in the deformation temperature. Mechanical properties and electron microscope photographs demonstrated that increase in the SiC particle contents, as microstructural obstacles, resulted in cell’s walls reinforcement against the early failure especially at the higher temperatures. Keywords Aluminum composite foams · Closed-cell foam · SiC reinforcement particles · Hot deformation · Plateau stress and energy absorption
1 Introduction Aluminum foams have a desirable specific strength and high energy dissipating performance and thus can be used as a perfect energy absorber material in a large number of practical applications under severe loading conditions [1, 2]. Their special cellular microstructure leads to a high degree of permanent plastic deformation at an almost constant yield strength. This ability results to absorb a large amount of kinetic energy by the structure before collapsing or fracture [3, 4]. Nowadays, metal foams are increasingly used for high-temperature applications such as heat exchanger, Technical Editor: João Marciano Laredo dos Reis. * Armin Dehnavi [email protected] 1
Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar, Iran
2
Department of Materials and Metallurgical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
3
Materials Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Mashhad Branch, Mashhad, Iran
heat shielding for aircraft, the cooling system in the burning chamber of a gas turbine, and steam turbine [5, 6]. However, most studies on the mechanical behavior of the metal foams were carried out at the room temperature [7–9] and very few investigations were considered the influences of the higher temperatures on the mechanical properties of the metal foams [10, 11]. The mechanical properties of metal foams can be tailored by varying the parameters like properties of relative density and types of load static or dynamic, cell wall material, anisotropy of foam structure, free or constrained compression and reinf
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