Abstract
In the present work, Al-2.5Cu-1.5 Mg-1Ni (AA2618) aluminium alloy with the incorporation of Cr3C2 reinforcement at 2, 3, 4 and 5 wt.% was systematically investigated. The composite powders were initially ball-milled and cold-compacted at 400 and 450 MPa. The pressure-less sintering was done at 550 and 600 °C for a holding time of 60 and 90 min under vacuum atmosphere. The experiments are implemented in accordance with Taguchi L8 OA with four process factors and four response characteristics. The results indicate that significant microstructural refinement with the precipitation of new Al-Cr-C compound was noticed up to 4 wt.% of Cr3C2 reinforcement, leading to tensile strength improvement at 28 and 200 °C. However, the strength was decreased at 5 wt.% Cr3C2 reinforcement, which could be attributed to the presence of coarse grain structure and agglomerated large GB precipitate.
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The authors acknowledge the Sophisticated Analytical Instruments Facility, DST-India for providing SEM facilities.
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NVSB was contributed to conception and design of study, acquisition of data, and analysis and/or interpretation of data. VVKPD drafted the manuscript. NVSB and VVKPD revised the manuscript critically for important intellectual content.
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Borra, N.V.S., Davuluri, V.V.K.P. Influence of Cr3C2 Addition on Microstructure and Mechanical Properties of AA2618 Composites by Powder Metallurgy. Metallogr. Microstruct. Anal. 12, 788–801 (2023). https://doi.org/10.1007/s13632-023-01003-8
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DOI: https://doi.org/10.1007/s13632-023-01003-8