Evaluation of the Effect of Bismuth on Mg₂Si Particulate Reinforced in Al-20%Mg₂Si In Situ Composite

Abstract:

Al-Mg₂Si in-situ composite as a class of advanced engineering materials has possessed better properties which enhanced them to be potential candidate to manufacture most of automotive and aerospace components. Melt treatment of the in-situ composite by addition of bismuth, Bi has resulted in a change of primary Mg₂Si reinforcement to a refined morphology which would expect to improve mechanical properties of the composite. Characteristics parameters of Mg₂Si particles have been investigated via thermal and microstructural analysis. It has revealed that 0.4wt.% Bi addition produced optimum refinement effect on the morphology since coarse structure has been change to polygon one and reduced most in size. The result also showed depression in nucleation temperature, T_N and growth temperature, T_G which also correspond to the refinement effect.

• Periodical: Advanced Materials Research (Volume 845)
• Pages: 22-26
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.845.22
• Online since: December 2013
• Authors: Nur Azmah Nordin, Saeed Farahany, Ali Ourdjini, T. Abubakar, Esah Hamzah
• Keywords: Bismuth, Composite, Refinement, Thermal Analysis

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