Enhancing the mechanical, wear and corrosion behaviour of stir casted aluminium 6061 hybrid composites through the incorporation of boron nitride and aluminium oxide particles

Abstract

This research paper portrays the enrichment of mechanical, wear and corrosion properties of the Aluminium 6061 matrix composite by incorporating hybrid reinforcements. Aluminium 6061 alloy is stir casted with different proportions of boron nitride (BN), Aluminium oxide (Al 2 O 3 ) and graphite particles. Tensile test reveals that the tensile strength and ductility for the Al 6061-30 BN -10Al 2 O 3 -5C is improved due to the presence of higher BN content along with 10% Al 2 O 3 . Significant improvement in microhardness (63HV), compressive strength (187 Pa) and impact strength (12 J) for the Al 6061-30 BN -10Al 2 O 3 -5C when compared with the bare Al 6061 alloy. The dispersion of BN with Al 2 O 3 improved the wear resistance for the Al 6061-30 BN -10 Al 2 O 3 -5 C composite, where as the unreinforced bare Al alloy has caused the major surface degradation resulting in poor wear property and the worn out surfaces are examined through the scanning electron microscope. The main wear mechanism is identified as adhesive wear. The corrosion test results clearly reveals that the corrosion resistance is higher for the Al 6061-30 BN -10Al 2 O 3 -5C (−0.526±0.004 V) with a lower current density of −0.983±0.004 μA cm −2 than the other composites and bare Al 6061.

Dry sliding wear response of aluminium matrix composites (AMCs): a critical review

“…This is such that the counter faces in the composites and the abrasive opposing material are separated by a layer of protecting material [110][111][112]. Gopinath et al [113] noticed the highest enhanced wear resistance in AA6061%-30%BN-10%Al 2 O 3 -5%Gr hybrid composite over all other materials regardless of the test conditions. According to a study by Sharma et al [114], sillimanite-reinforced composite offered enhanced wear resistance over the monolithic alloy.…”

Investigation of Mechanical, Wear, and Corrosion Properties of Al–BN–SiC–RHA Hybrid Composites Synthesized Through Powder Metallurgy Process

“…A scan rate of 1 mV/s is maintained throughout the experiment. The Electrochemical Impedance Spectroscopy (EIS) test for the Al-5BN-5SiC-RHA hybrid nanocomposites are accomplished at the range of 100 kHz to 100 MHz and at the voltage of 5 mV [25,29,30].…”

“…The ceramic particles such as Al 2 O 3 , ZnO, SiC, B 4 C, BN and TiC are the materials which are explored earlier owing to their exceptional mechanical, electrical properties and also because of their availability [16][17][18]. Further it has also been reported that BN and SiC ceramic particles possesses excellent mechanical and corrosion resistant properties compared to other ceramic particles [8,[19][20][21][22][23][24][25].…”

Corrosion behavior of a newly developed high strength aluminum alloy with high magnesium content under simulated seawater environment

“…Different from traditional Al-Mg [18,44] and Al-Mg-Si [45,46] alloys, AMg61 (Al-6.2% Mg) is a newly developed highstrength aluminum alloy with high magnesium content, which is specially used as the key structural material for the high-velocity speedboat. Nevertheless, the high Mg content results in an anodic second phase, which leads to a strong tendency to corrosion in the marine environment.…”