| Abstrakt: |
This study investigates the mechanical and wear properties of AA6061 composites reinforced with monosynthesized Al2TiO5particles. Bottom pouring and stir casting were employed to achieve uniform dispersion of Al2TiO5. Five composite samples were fabricated with varying Al2TiO5weight percentages (wt%) (0, 1, 2, 3, and 3.5) while maintaining a constant stirring speed of 400 rpm. Tensile strength, impact energy, and microhardness were evaluated according to ASTM standards. Wear rate and coefficient of friction (CoF) were measured using a Pin-on-Disc apparatus on samples prepared through ASTM G99. Composites reinforced with 2 wt% and 3.5 wt% Al2TiO5exhibited the highest tensile strength (215.96 MPa) and impact strength (12.6 J), respectively. Microhardness increased significantly in samples 6R1 (75.37 HV), 6R2 (83.75 HV), and 6R3 (91.6 HV) compared to 6R0 (71.52 HV) and 6R3.5 (72.26 HV). Based on the finding that 1, 2, and 3 wt% Al2TiO5reinforcement improved hardness, RSM optimization was applied to these compositions to further adapt the wear rate and CoF. Field emission scanning electron microscopy (FESEM) was used to examine the worn surface morphology of the composites and understand how Al2TiO5particles influence wear mechanisms. The 3 wt% Al2TiO5reinforced composite demonstrated an 83.5% increase in wear resistance compared to other samples under a 10 N load and 1600 m sliding distance. |
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