Mechanical, machining and corrosion properties of Al5083‐carbon nanotubes composite produced by friction stir processing

Abstract

In the current work, composites of Al5083 aluminum alloy and carbon nanotubes were developed by friction stir processing. Grain size reduction was observed in the composite from a starting size of 115 μm±4.6 μm to 11 μm±3.3 μm. Higher hardness, yield strength and ultimate tensile strength were measured for the composite at the cost of losing ductility compared with friction stir processed Al5083 and base alloy. This behavior can be understood by considering the influence of grain size and carbon nanotubes. Machining studies carried out by conducting drilling experiments demonstrate decreasing cutting forces for the composite compared with friction stir processed Al5083. However, compared with base alloy, composite exhibited higher cutting forces at all of the cutting parameters. Corrosion behavior of the materials assessed by electrochemical tests demonstrates the promising effect of grain refinement on enhancing the corrosion resistance of friction stir processed Al5083. However, presence of carbon nanotubes marginally decreased the corrosion resistance of composite compared with friction stir processed Al5083. From the results, it can be understood that the addition of carbon nanotubes significantly enhance the mechanical properties and machinability. However, addition of carbon nanotubes on decreasing the corrosion performance is a noteworthy observation.

Effect of deformation temperature and degree on tensile properties of the extruded 2024Al/Al18B4O33w composite with extrusion – forging multistage hot deformation

“…Aluminum matrix composites with excellent mechanical properties are widely used in aerospace field [1–4]. Some cast defects like porosity and clusters of reinforcement, reduce the enhancement effect and limit the application.…”

Experimental investigation on microstructure, mechanical and machining properties of Al‐4032/granite marble powder (GMP) composite produced through stir casting

“…The weak machinability of aluminium-based composite results to less material removal rate and more cutting action/time, therefore more energy consumption. Hence, the green effect of Al-4032/granite marble powder composite requires to be improved [26]. The primary purpose of present study is to fabricate the Al-4032-based composite with reinforced granite marble powder using the stir casting setup.…”

Characterization of novel molybdenum disulfide and cerium dioxide reinforced hybrid aluminum matrix composites fabricated by friction stir processing

“…The aluminum matrix composites are often subjected to heat, wear and corrosive medium as those are extensively used in automobile and aerospace sectors as structural material and to fabricate other components [33]. Increasing the hardness by reinforcing very hard brittle particles certainly improves the wear resistance of the composite, but that comes with expense of ductility [31,34,35]. However, using solid lubricant enhances the wear resistance without making the composite very brittle.…”