Development and investigations of AA 7075 TiC powder metallurgy metal matrix composites

Abstract

Composite material is the term which made a paradigm shift in the field of material science. It introduces a new engineered material with improved properties for required applications. Among the various types of composites, metal matrix composites have wider applications owing to their enhanced material properties. Aluminium metal matrix composite has its own space, particularly in the field of aerospace, marine and automotive industry. Furthermore, the properties of aluminium may rise by converting it as a metal matrix composites and an in-depth investigation on the evolved properties is needed view of metallurgical, mechanical and tribological aspects.Aluminium 7075 is most comprehensively used in the aircraft structures and automotive applications. Several kinds of reinforcement in the form of oxides, carbides, nitrides and borides actively take part in the enhancement of material properties and titanium carbide is one among the carbides which has its newlineunique place due its exciting properties. Considering the above, in the present newlinework, Aluminium metal matrix reinforced with TiC particle to form the compositesof AA7075+0%TiC, AA7075+8 wt.% TiC and AA7075+16 wt.% newlineTiC combinationsare produced through powder metallurgy technique. The metallurgical studies such as X-ray diffraction analysis and scanning electron newlinemicroscopic analysis havedone to confirm the occurrence of reinforcements. The ardness and density of sintered and cold upset preforms of the composites are measured and compared.The cold upset test is conducted on the synthesized composites and different stress parameters like true axial stress, hoop stress, hydrostatic stress, effective stress, true axial strain and formability stress index were calculated to study the forming behavior of the produced composite in tri-axial stress state condition. newline newline