Influence of Cu, Zn and Si alloying elements on Al alloy foams produced using Mg blowing agent

Cheng

et al. 2022

Surface Engineering

In the present study, hybrid closed-cell foams consisting of two materials with different ductilities were manufactured to improve the energy absorption capacity. The mechanical characteristics, deformation modes and energy absorption capacities of the foams were investigated. Furthermore, the energy absorption mechanisms of the hybrid foams were analysed. The results demonstrated a significant synergistic effect between the foams and coating with different ductilities during deformation. Their combination increased the densification strain and improved the energy absorption capacity of the samples. Among the specimens investigated, the Al/Zn-Cu(A) foam showed the best densification strain (0.75) and presented superior energy absorption capacities (energy absorption capacity per unit volume (U v ) = 4.5 J cm -3 ; energy absorption capacity per unit mass (U m ) = 8.4 J g -1 ). The intrinsic mechanism of energy absorption optimisation is a combination of the advantages of brittle and ductile deformation modes.

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Improved energy absorption capacity of closed-cell aluminium foams by electroplating

Cheng

et al. 2022

Surface Engineering

Proceedings of the Institution of Mechanical Engineers, Part E:

“…46,56,[65][66][67] CCAFs have been produced through various methods and using various blowing agents. 47,68 In addition to blowing agents various stabilizing elements usually ceramics have been used over the years to achieve foam stability. 11,48,[69][70][71][72][73] Typical studies of foams using dolomite as the blowing agent powder through the precursor method, indicate the possibility of manufacturing the foam with desired mechanical properties at very low costs as compared to the ones using expensive blowing agents.…”

Section: Mechanical Behavior Of Aluminum Metal Foammentioning

confidence: 99%

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

Nisa

Pandey

2022

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.

“…These compositions do not only increase the strength but also robust the abrasion properties under stress that relied on complicated phases in the grain boundaries. Moreover, it is also employed under intermediate alloy formation [4].…”

Section: Introductionmentioning

confidence: 99%

“…The fine grain structure will parently robust the mechanical properties of ingots. However, the alloys contain over 5 % Si which the mechanical traits are slightly enhanced under conditions that ingots must be guarantee to solid or have a certain number of intermetallic phases, such as FeSiAl 5 at a certain extent [4,7].…”

Section: Introductionmentioning

confidence: 99%

Research on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy when modified by La, Ce and thermo-mechanical treatment

Bui

Nam

et al. 2022

Eureka: PE

Influence of rare-earth (La, Ce) and thermo-mechanical treatment on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy are presented in this article. After casting, the alloy which was modified by La, Ce, the grain size of samples obtained around 40–50 µm compared to that of without about 65 µm; and after homogeneous, the grain sizes is about 30 µm. After the cold deformation process, the distance between plates is 10 µm. By EDS after casting, the samples have tended to more La, Ce elements at the grain boundary, after homogeneous, the uniformation distribution of rare-earths was presented by mapping of EDS’s results. In addition, after rolling and heat treatment, the elements were found on the grain boundary and matrix. After recrystallization annealing, the grain size is around 10 µm with the modification sample. The grain size was reduced by two processes of modification as well as thermal-mechanical treatment is a condition for increasing the ductility of the studied alloy. Further, as a result of ability deformation from the tensile test, these results demonstrate that the tensile test obtained 140 % when adding La, Ce contents into the alloy combine with thermal-mechanical treatment. The combined used of La, Ce and thermal-mechanical treatment have increased the ductility of Al-Zn-Mg-Cu alloy