A review of the compressive properties of closed-cell aluminum metal foams

Abstract

Materials scientists and engineers have been trying to create porous metals and metal foams for many years. Naturally occurring porous materials such as bone, coral, cork, balsa wood, etc., are responsible for initiating research in the area of producing porous metals and metal foams. Metal foam is a cellular structure made up of a solid metal-containing a large volume fraction of gas-filled pores. These pores can either be sealed (closed-cell foam), or they can be an interconnected network (open-cell foam). The closed-cell foam is referred to as metal foams, while the open-cell foam is referred to simply as porous metal. Some of the key properties of the metal foam are, ultra-light material (75–95% of the volume consists of void spaces), very high porosity, and high compression strengths combined with good energy absorption characteristics. This paper provides a comprehensive review of mechanical characterizations of closed-cell aluminum metal foams (CCAFs) or porous aluminum alloys, the trends in their mechanical behavior specifically their compressive performance. The significant factors influencing this behavior are intricately studied in light of the available literature. The aim of this work is to facilitate a channelized development over the past few decades in the field of mechanical behavior of CCAF that may be of help to the researchers, academicians, and industries for the critical understanding of the failure criteria and mechanical properties of closed-cell aluminum metal foams.

Fabrication, Processing, Properties, and Applications of Closed-Cell Aluminum Foams: A Review

“…The MEPs of aluminum foams are mainly influenced by pore structure, cell wall defects, and microstructure [127][128][129][130][131][132][133].…”

Aluminum foam development by filling architecture techniques and process optimization

“…The plateau stress used in this study is the average stress measured in quasi-static compression across the sample's strain range. 37 A sample of each technique is selected during the test based on the composition and number of passes. It is found from the previous results that the composition ''C'' (40% TiH 2 ) and four numbers of passes are giving better porosity as compared to other parameters.…”

Metal foams: A review for mechanical properties under tensile and shear stress

“…Also, hollow sphere structures show better behaviour under compression stress compared with the other structures, perhaps due to the more regular cell size and dispersion of porosity within materials compared to other metal foams. A recent extensive literature review on experimental methods for metal foams and porous metal in compression has been reported in Völlmecke et al (2021) and in Nisa et al (2022).…”