Researches on the Pressing and Foaming Conditions on the Main Properties of Al Foams

2007 ◽  
pp. 153-156
Author(s):  
Traian Canta ◽  
Dan Frunză ◽  
Manuela Covaciu
Keyword(s):  
Al Foams

scholarly journals Effect of Cell Wall Ductility and Toughness on Compressive Response and Strain Rate Sensitivity of Aluminium Foam

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Alexandra Byakova ◽  
Svyatoslav Gnyloskurenko ◽  
Andrey Vlasov ◽  
Nikolay Semenov ◽  
Yan Yevych ◽  
...  
Keyword(s):  
Cell Wall ◽  
Strain Rate ◽  
Dynamic Loading ◽  
Strain Rate Sensitivity ◽  
Rate Sensitivity ◽  
Melt Processing ◽  
Wall Material ◽  
Static Compression ◽  
Quasi Static Compression ◽  
Al Foams

The study presents the effect of cell wall ductility and toughness on the compressive behaviour of closed-cell Al foams under static and dynamic loading and localised deformation by indentation. Two kinds of Al alloys including relatively ductile AlSiMg alloy and high-strength AlZnMg alloy, which comprises a great amount of brittle eutectic domains, were used as matrix materials. Both kinds of Al foams were fabricated via newly developed melt processing using the CaCO3-foaming agent without Ca additive. Mechanical behaviour of Al foams under quasi-static compression and indentation was examined and compared with that performed under dynamic loading using direct impact tests. Characteristic events revealed in deformation patterns of Al foams at quasi-static compression were also monitored with the CCD camera. Significant differences in stress-strain response and strain rate sensitivity of Al foams arose from the difference in the microstructure, and hence, ductility and toughness of the cell wall material were investigated and discussed.

Oxidation Resistance of Highly Porous Fe-Al Foams Prepared by Thermal Explosion

2018 ◽  
Vol 49 (8) ◽  
pp. 3683-3691 ◽  
Author(s):  
Xiaoping Cai ◽  
Yanan Liu ◽  
Xiaohong Wang ◽  
Xinyang Jiao ◽  
Jianzhong Wang ◽  
...  
Keyword(s):  
Thermal Explosion ◽  
Oxidation Resistance ◽  
Highly Porous ◽  
Al Foams

scholarly journals Mechanical behavior of PCMT and SDP Al foams: a comparison

2020 ◽  
Vol 25 ◽  
pp. 55-62
Author(s):  
Girolamo Costanza ◽  
Maria Elisa Tata
Keyword(s):  
Mechanical Behavior ◽  
Al Foams

A Comparative Investigation on Foamability and Structure of Al Foams Added with Precipitator and Cenosphere Fly Ash Particles

2013 ◽  
Vol 652-654 ◽  
pp. 89-92
Author(s):  
Attanadol Prapajaraswong ◽  
Seksak Asavavisithchai
Keyword(s):  
Fly Ash ◽  
Comparative Investigation ◽  
Engineering Material ◽  
Foam Structure ◽  
Specific Strength ◽  
High Specific Strength ◽  
Large Expansion ◽  
Al Foam ◽  
Strength And Stiffness ◽  
Al Foams

Al foam is an advanced engineering material with many outstanding properties, such as very low density, high specific strength and stiffness, and large energy absorption. In the present study, pure Al foams were mixed with either cenosphere or precipitator fly ash particles of various contents. Fly ash particles are used in Al foams as reinforcement and stabilising materials which enable the foams with large expansion. It is found that Al foams with precipitator fly ash particles of various contents exhibited larger expansions than the foams with cenosphere fly ash particles. The quantitative analysis also revealed that more stable foam structure was obtained in Al foams with precipitator fly ash addition.

scholarly journals Preparation and performances of bulk porous Al foams impregnated with phase-change-materials for thermal storage

2012 ◽  
Vol 22 (5) ◽  
pp. 440-444 ◽  
Author(s):  
Jinghua Jiang ◽  
Yingying Zhu ◽  
Aibin Ma ◽  
Donghui Yang ◽  
Fumin Lu ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Thermal Storage ◽  
Al Foams

Vacuum Foaming of Aluminum Scrap

2012 ◽  
Vol 1481 ◽  
pp. 83-88
Author(s):  
J. A. Garabito ◽  
H. Granados ◽  
V. H. López ◽  
A. R. Kennedy ◽  
J. E. Bedolla
Keyword(s):  
Automotive Industry ◽  
Vacuum Chamber ◽  
Low Cost ◽  
Porous Structures ◽  
Aluminum Foams ◽  
Casting And Solidification ◽  
Different Temperatures ◽  
Different Levels ◽  
Al Foams

ABSTRACTIn this study, scrap from the automotive industry was used to produce aluminium foams under vacuum. Chips of an aluminium alloy LM26 were melted and 1wt. % of Mg was added for creating a viscous casting with uniform distribution of oxides. An ingot was obtained of this alloy after casting and solidification. Trials for foaming this alloy were performed by re-melting pieces under vacuum at different temperatures. A window in the vacuum chamber allowed observation of the foaming and collapse of the porous structures was observed during cooling. Characterization of the aluminum foams revealed different levels of expansion, porous structures and degrees of drainage. The best foams were obtained at 680 °C with a density of 0.78 g/cm3. This technique appears to be a feasible low cost route for producing Al foams based on scrap material.

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