Mechanical and Corrosion Behavior of Al7075 (Hybrid) Metal Matrix Composites by Two Step Stir Casting Process

• Published in: Latin American journal of solids and structures Vol. 14; no. 2; pp. 243 - 255
• Main Authors: Sambathkumar, M., Navaneethakrishnan, P., Ponappa, K., Sasikumar, K.S.K.
• Format: Journal Article
• Language: English
• Published: Associação Brasileira de Ciências Mecânicas 01-02-2017; Marcílio Alves
• Subjects: Al7075; Corrosion; ENGINEERING, CIVIL; ENGINEERING, MECHANICAL; Mechanical properties; MECHANICS; Two step stir casting; Mechanical properties; Two step stir casting; Al7075; Corrosion
• ISSN: 1679-7825; 1679-7825
• DOI: 10.1590/1679-78253132

Abstract This paper investigates the mechanical properties and corrosion behavior of Metal Matrix Composites prepared using Al7075 alloy as a matrix, Silicon Carbide and Titanium Carbide as reinforcement particles. Two step stir casting process was used to fabricate the composites by varying volume fractions of Silicon Carbide and Titanium Carbide (0 to 15 vol. %). Microstructural analysis, mechanical and corrosion behavior were used to evaluate the performance of the composites. Uniform distribution of reinforcement particle was observed through optical photomicrographs. Vickers micro hardness tests were performed and the hardness values were increased with an increase in reinforcement from 0 to 15 vol. %. The tensile strength of the 10 vol. % of aluminum hybrid matrix composite was better than that of the base alloy. In 3.5% NaCl solution, it was observed that the 15 vol. % of the aluminum hybrid matrix composite have higher corrosion resistance in comparison the base alloy.