Editorial

Lefebvre, Louis Philippe; Banhart, John; Dunand, David C.

doi:10.1002/adem.200890024

Cited by 60 publications

(74 citation statements)

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“…This causes premature hydrogen release and an actual porosity lower than that calculated. [24] Some research try to prevent this phenomenon by surface oxidation, covering the particles with a thin layer of nickel [24,25] or aluminum. [26] For foaming a Mg alloy (AZ31), initially an Al-10TiH 2 [26] composite, which contains TiH 2 particles entrapped in the aluminum matrix, is prepared.…”

Section: Melt Foaming Methodsmentioning

confidence: 99%

Current Status and Recent Developments in Porous Magnesium Fabrication

et al. 2017

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A significant number of studies have been dedicated to the fabrication and properties of metallic foams. The most recent research is focused on metals with low weight and good mechanical properties, such as titanium, aluminum, and magnesium. Whereas the first two are already fairly well studied and already find application in industry, magnesium currently remains at the research stage. The present review covers the studies conducted on fabrication techniques, surface modifications, and properties of porous structures made of magnesium and its alloys.

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Section: Melt Foaming Methodsmentioning

confidence: 99%

Current Status and Recent Developments in Porous Magnesium Fabrication

et al. 2017

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“…1,2) The unique structure of aluminum foams brings about a series of superior properties, such as lightweight, high energy absorption capacity, high sound absorption capacity, re resistant property, good electromagnetic shielding property and so on. [3][4][5][6] Aluminum foams therefore have great application potential in aviation, aerospace, building industry and automobile industry.…”

Section: Instructionmentioning

confidence: 99%

Foaming Process and Properties of 6063 Aluminum Foams by Melt Foaming Method

et al. 2017

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Aluminum foams made by 6063 aluminum alloy have been prepared by melt foaming method. The uniformity of foam pores is much concerned for that homogeneous pores attribute to excellent properties. It is mainly up to the stirring intensity when adding the blowing agent into the melt, and the cooling rate of the liquid foams. In this paper, 6063 aluminum foams have been fabricated by different stirring times of TiH 2 at different cooling conditions. Microstructure, cell size uniformity and compressive property of the foams have been studied. The melt which mechanically stirred for 6 minutes before foaming and the foam cooled in the air show homogenous pore structure and good mechanical property. The use of 6063 aluminum alloy offers a new raw material to prepare foams with a uniform cell size distribution as well as good mechanical property. InstructionAluminum foam, which was proposed by De Meller for the rst time in the year of 1925, is a kind of cellular material combined with aluminum or its alloys and pores.1,2) The unique structure of aluminum foams brings about a series of superior properties, such as lightweight, high energy absorption capacity, high sound absorption capacity, re resistant property, good electromagnetic shielding property and so on.3-6) Aluminum foams therefore have great application potential in aviation, aerospace, building industry and automobile industry.7-9) Among numerous manufacturing technologies, melt foaming method, also named as Alporas route, is widely adopted at the advantages of its simple fabrication process and industrialized mass production. 10,11) Various raw materials of aluminum foams have been focused on in recent years, such as pure aluminum, Al-Si alloy, Al-Mg alloy and so on.12-18) However, reports on 6063 aluminum foams fabricated by melt foaming method are few. Liu, etc. have examined the impact behavior, deformation mode and energy absorption ability during axial crushing of 6063 aluminum foams, which showed that the dynamic impact contained two steps: initial compression and gradual crushing, and specimens deformed in V -shape or inverted Vshape mode among different density values.19) B.Y. Hur pointed out that porosity and pore size were uniformly distributed with the decreasing in foaming temperature of 6063 aluminum foam. 20) There are some advantages for using 6063 aluminum alloy as raw materials. Firstly, reducing the surface tension of the melt by adding Mg can reduce the interfacial energy between pores and melt, so that pores are stabilized not to combine together and pore diameter is decreased. 21)But too low the surface tension will reduce the melt s stability and incur collapse.22) The amount of Mg (0.45-0.9 mass%) element in 6063 alloy is just appropriate to reduce the surface tension a little. Secondly, liquidus temperature of raw materials applied in melt foaming method should meet the rapid decomposition temperature of the blowing agent. On one hand, the decomposition of blowing agent is speeding up with the raising temperature, so that a higher foa...

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“…Special attention has been attracted to light alloys and other materials of metal or ceramic matrix [1] , [2] , [3]. Metal foams are materials of high porosity which possess specific combination of thermo-mechanical and physical properties, [4].…”

Section: Introductionmentioning

confidence: 99%

Some considerations on modelling and homogenization of multiphase light alloys

Parashkevova

2018

MATEC Web Conf.

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Abstract. The modelling strategies aimed to access the thermo-mechanical behavior of the up-to date light and superlight alloys should take into account characteristics of each particular manufacturing technology. In the present study the light alloys and materials of high porosity are regarded as multiphase composites for which the content of embedded phases is predominant. A new modification of differential effective medium theory is presented accounting for inclusion's size effects. The applied approach is based on the size-sensitive dilute homogenization procedure with Cosserat material matrix. Numerical examples for elastic properties of a close cell foam materials with different Poisson's ratio are presented and discussed.

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Editorial

Cited by 60 publications

References 0 publications

Current Status and Recent Developments in Porous Magnesium Fabrication

Current Status and Recent Developments in Porous Magnesium Fabrication

Foaming Process and Properties of 6063 Aluminum Foams by Melt Foaming Method

Some considerations on modelling and homogenization of multiphase light alloys

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