Effect of Ni addition on the behavior of dissimilar A356-AZ91/CeO 2 aluminum-magnesium based composite fabricated by friction stir process technique

ABSTRACTIn the present study, the Behavior of Dissimilar A356-AZ91/CeO2 Aluminum-Magnesium Based Composite Fabricated by Friction Stir Process Technique was observed. The Macrostructure of A356-AZ91/5%CeO2/2% Ni showed a defect-free and crack-free composite. Microstructural examination revealed that the FSP effectively distributed the CeO2 particles within the matrix, resulting in a refined microstructure. Tensile strength of A356-AZ91 matrix material was improved by about 38.04% after the addition of 5% CeO2. However, with the 2% Ni addition to A356-AZ91/5% CeO2 composite displaying further enhancement. The addition of 5% CeO2 and 2% Ni to the A356-AZ91 alloy through FSP showed a 44.78% improvement in tensile strength. There was an improvement in the hardness after adding the 2% Ni- 5% CeO2 particles was found 41.66%. Hardness of A356-AZ91-5% CeO2 was improved only by about 28.33% without addition of 2% Ni. Wear testing of aluminum composite was carried out using a pin-on-disc apparatus. The wear rate of A356-AZ91 alloy decreased by about 70% after the addition of the 2% Ni- 5% CeO2 particles. However, wear rate of A356-AZ91 alloy decreased only by about 61.66% after the addition of 5% CeO2 particles.KEYWORDS: Interfacial layermacrostructureFSP techniquefatigue strengthwear Disclosure statementNo potential conflict of interest was reported by the author(s).