Abstract
In this paper compressive behaviour of an Aluminium foam composite have been evaluated and discussed. The outcome reflects that quasi static stress –strain curve of Al composite was same as to Al foams. However, within the two strain ranges from strain less than 0.03 and strain greater than 0.2, the ideal absorption energy of the composites was higher than that of parent Al foams. When the strain ranged from 0.03 to 0.2 the ideal energy absorption efficiency value of the composite was lower than the Al foams.
 There are many methods for fabricating metal foams but we preferred powder metallurgy process. This process of production allows for the production of complex shaped foam parts. Many alloys including Aluminium, zinc, tin, lead and steel can be produced using this method. The fabricated part has a closed cell microstructure and a high fraction of porosity. Mechanical properties foams are evaluated including the axial crushing, Hardness and toughness test are also carried out. Applications are such as light weight construction and energy absorption for civilians as well as military uses.
Highlights
6061 (Unified Numbering System (UNS) designation A96061) is a precipitation-hardened aluminium alloy, containing magnesium and silicon as its major alloying elements
Called "Alloy 61S", it was developed in 1935. It has good mechanical properties, exhibits good weld ability, and is very commonly extruded. It is one of the most common alloys of aluminium for generalpurpose use. [1,2,3,4,5,6,7,8] It is commonly available in pre-tempered grades such as 6061-O, tempered grades such as 6061T6 and 6061-T651. [9,10] Aluminium metal foams are produced with various methods like powder metallurgy technique, sintering technique, addition of gas in melt injection, using agent in melt foaming, and investing casting
This paper reports the history of metallic foam, different types of fabrication process as casting methods, powder metallurgy process
Summary
6061 (Unified Numbering System (UNS) designation A96061) is a precipitation-hardened aluminium alloy, containing magnesium and silicon as its major alloying elements. Called "Alloy 61S", it was developed in 1935 It has good mechanical properties, exhibits good weld ability, and is very commonly extruded (second in popularity only to 6063). [9,10] Aluminium metal foams are produced with various methods like powder metallurgy technique, sintering technique, addition of gas in melt injection, using agent in melt foaming, and investing casting. MS-2021-36 foaming agent, area unit comparatively high production prices as attain smart material properties By this methodology produced a replacement form of closed cell foams by filling the vacancies around a random dense collection of preformed hollow spheres with a solid matrix material, either through casting or through powder metallurgy method with the aim of increasing their energy absorption and strength. To test lateral instability due to buckling action, Compressive strength of specimen have been tested by placing the specimen between the compression plates at its centre position such a way that the moving head’s centre is placed vertically above the centre of the specimen and the load is applied by giving direction to advancing the head until the specimen breaks down. 21kN, 25kN, 27kN, and 30kN load applied on cylindrical specimen of diameter 15 mm (cross-sectional area 176.625mm2) to get ultimate strength
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