Experimental Evaluation on the Mechanical Stability and Structural Properties of Reinforced Hulls/Shells Biocompactability Infringement on 85Al-6RHA-9PSA Alloy

Abstract:

The need to obtain a uniformly distributed reinforced particulate on AA6063 aluminium alloy for improved mechanical, corrosion and structural properties has necessitated this study. A well synthesised biocompactable particulate of rice hulls/periwinkle shells under varying matrix of 85Al-9.0RHA-6.0PSA, 85Al-7.5RHA-7.5PSA, and 85Al-6.0RHA-9.0PSA was developed and compared with the control for manufacturing application. The microstructural evolution was observed using SEM/EDS quantification. The intermetallic assessment was done using X-ray Diffractometer (XRD). The diameter of indentation was used to measured the microhardness respnses. The corrosion rate and polarization resistance was examined using Liner polarization resistance technique and open circult potential route under simulated 3.65% NaCl. From the results, 85Al-9RHA-6PSA composite sample exhibited slightly lower Cr, lower j_corr, and higher Pr of 0.3562 mm/year, 3.066E-05 A/cm² and 139.33 Ω, respectively against the control sample. An indication of a significant passive characteristics. The 85Al-9RHA-6PSA composite sample also exhibited few dimples, shrinkage cavities and micropores. With composite alloys, good crystalline were observed inform of Al₁₆Co₇Zr₆Al₁₅Co₄ and Al_0.52Co_0.48Al₁₆Co₇Zr_6. The hardness properties improvement from 54.8 to 63.8% provides a significant effect of solid strengthening performance of the hulls/shells as a biocompactability infringement of structural alloy.

• Periodical: International Journal of Engineering Research in Africa (Volume 73)
• Pages: 1-10
• DOI: https://doi.org/10.4028/p-T1Yqp1
• Online since: May 2025
• Authors: Ugbede W. Abuh, Ojo S. I. Fayomi*
• Keywords: Aluminium, Characterization, Periwinkle Shell, Reinforcement, Rice Hulls

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