Search

In this study, Al2219 composites with varying wt.% of Si3N4 particles using a combination of stir casting and squeeze casting techniques have been explored. Al2219 alloy with 3, 6, and 9 wt.% of Si3N4 composites was examined for the microstructures through SEM analysis, which revealed an even dissemination of the reinforcement particles within the base matrix. Remarkably, did not observe any issues such as particle agglomeration, residual porosity, or other casting-related problems. The inclusion of ceramic particles in the squeezed composites led to significant increments in hardness, tensile and yield strength, and Izod impact strength when compared to the base Al2219 matrix alloy. Notably, during compression testing, observed a considerable increase in compressive strengths, albeit at the expense of reduced failure strain, as the concentration of hard ceramic reinforcement particles increased. [ABSTRACT FROM AUTHOR]

In today's manufacturing industries, Metal Matrix Composites (MMCs) are in high demand owing to their valuable properties like high strength-to-weight ratio and resistance against wear. This research evaluates the wear properties of AA2219 matrix composites reinforced using varying amounts (2%, 4% and 6% by weight) of Si3N4 particles, fabricated by squeeze casting. Wear performance testing of the developed Aluminium Matrix Composite (AMC) is executed by utilising pin-on-disc equipment subjected to varying conditions of load and speed. The wear rate is reported to rise with increasing normal load and sliding velocity. The study also reveals that the wear rate reduces with increasing reinforcement content. [ABSTRACT FROM AUTHOR]

The manufacturing sector perpetually seeks high-quality materials capable of meeting the requirements for enhanced mechanical properties, thereby enabling their widespread application across various industries. Integrating Carbon Fibers (CFs) into metal matrices has demonstrated significant efficacy in augmenting the comprehensive attributes of the resultant composites. This comprehensive review focuses on the latest advancements and techniques involving the utilization of carbon fibers in conjunction with metal matrix material, aimed at augmenting a spectrum of mechanical attributes. Various methods used to synthesize carbon fiber reinforced metal composites have been discussed and summarized. Liquid metallurgy technique is playing important role in the fabrication of the carbon fiber reinforced metal composites. [ABSTRACT FROM AUTHOR]

This experimental research analyses tensile and microstructural behaviour followed by Al7475 (Al-Zn) metal alloy with 3 and 6 wt% of composites of B4C. The liquid metallurgical technique was used in this analysis for creating the Al7475 alloy with 3 and 6 wt% percentages of B4C particle composites. Additional techniques such as EDS/SEM were also employed in this analysis to determine the microstructural behaviour. ASTM Standards are followed to study the mechanical behaviour of Al7475 alloy with B4C-reinforced composites. The incorporation of B4C particles into Al7475 resulted in extreme characteristics in the field of the composite material thereby enhancing its maximum application. By combining different materials, the hardness and tensile strength of the composites improved. Tensile fractured surfaces indicated the brittle and ductile mode of fracture behaviour in the Al7075-B4C composites. [ABSTRACT FROM AUTHOR]

Joining of similar metal sheets of Al-2024 with and without hematite ore particulates in between the sheets was performed through the solid-state diffusion bonding process by means of compression testing machine. During joining process, heat was applied to the specimen through the customized die in which electric heating elements were inserted. The specimens were subjected to continuous compressive plastic deformation by using compression testing machine for different holding times. Microstructural analysis confirms that solid-state bonding depends on the process parameters used. Tensile testing result shows that, strength of the joint increases with increase in holding pressure and time. [ABSTRACT FROM AUTHOR]