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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.2016017308
pages 93-105

INFLUENCE OF TITANIUM-COATED (B4C + SiC) PARTICLES ON ELECTRIC DISCHARGE MACHINING OF AA7050 HYBRID COMPOSITES

Ranjith Rajamanickam
Department of Mechanical Engineering, Sri Ranganathar Institute of Engineering and Technology, Coimbatore 641110, India
P. K. Giridharan
Department of Mechanical Engineering, Kumaraguru College of Technology, Coimbatore — 641049, Tamil Nadu, India
J. Devaraj
Department of Mechanical Engineering, Sri Ranganathar Institute of Engineering and Technology, Coimbatore 641110, India

RESUMO

Aluminum alloy AA7050 reinforced with titanium-coated boron carbide and silicon carbide particles is produced by stir casting. The micrograph reveals uniform distribution of coated reinforcements in aluminum composites. Eight types of composites are produced by varying percentage reinforcement. The influence of reinforcing particles present in composites on electric discharge machining has been analyzed. The material removal rate and tool wear ratio decrease with increasing percentage reinforcement. The composite exhibits better surface finish due to heat dissipation. The surface texture of composites shows lesser white spots compared to unreinforced aluminum alloy. An increase in the spark gap due to the addition of strengthening particles is evident. At higher magnification surface cracks, microvoids, and recasted layers are visible.