Production and Compressive Characterization of Aluminium MMC Foam Manufactured Using Dual Foaming Agent

5th National Conference on Processing and Characterization of Materials

Haidar, S.^1 ; Ansary, S.^2 ; Rahman, A.^2

Asst. Prof., Department of Mechanical Engineering, Aliah University, Kolkata-156, West Bengal, New Town, India^1

PG Scholar, Department of Mechanical Engineering, Aliah University, Kolkata-156, West Bengal., New Town

India, India^2

关键词: Cell size distribution;    Cellular material;    Closed cell foams;    Compressive properties;    Novel strategies;    Relative density;    Selective oxidation;    Titanium hydride;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/115/1/012030/pdf
DOI  :  10.1088/1757-899X/115/1/012030

来源: IOP

【 摘 要 】

Aluminium foams, produced by melting Aluminium alloy (LM6) containing blowing agent(s) and vigorous stirring. TiH2is a known agent for this. As TiH2begins to decompose into Ti and gaseous H2when heated above about 465°C, large volumes of hydrogen gas are rapidly produced, creating bubbles that leads to a closed cell foam. A novel Strategy to enhance the mechanical properties of Al-MMC foams is discussed here, and it is demonstrated that titanium hydride (TiH2) in the form of 10-15 μm diameter particles can be pre-treated by selective oxidation to produce more uniform foams having better compressive properties (yield strength and energy absorption). It is found that the mechanical properties of the foams and the uniformity of cell size distribution is improved when the foam is blown with an optimized mixture of CaCO3and pretreated TiH2. In order to define the relationship of mechanical properties with relative density of this material, correlations which uniquely defines the compressive behaviour of this modified Al- MMC foam has been developed.