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- W2981920007 abstract "Gas Tungsten Arc (GTA) surface alloying has been carried out on an aluminium bronze alloy electroplated with Cr at two different heat inputs (currents of 160 A and 180 A) in an argon environment. The microstructural changes have been studied using an optical microscope (OM), scanning electron microscope (SEM), and X-ray diffraction (XRD) analysis. In addition, the influence of Cr content on hardness, wear resistance, coefficient of friction, and corrosion behaviour has been examined. Moreover, it is observed that the Cr modification leads to enhanced heat transfer on the substrate, resulting in improved hardness, depth of penetration and decreased wear rate. Microstructure and X-ray diffraction analyses showed grain refinement due to the surface modification process (SMP). Further, it was seen that the formation of intermediate phases was confirmed through characterisation techniques (EDS, XRD). Surface hardness improved from 210 HV to 688 for 160 A Cr modified specimen (960 KJ/mm) and 732 HV for 180 A Cr modified specimen (at 1080 KJ/mm). The depth of penetration increased with increased heat input and was higher for 180 A Cr modified specimen than 160 A Cr modified specimen. Wear loss and wear rate is inversely proportional to the hardness and decreased significantly with higher heat input and for Cr modification. The coefficient of friction remains constant with irrespective of hardness. Corrosion behaviour of the alloys was studied in a saline environment (3.5 wt% NaCl) by Tafel polarisation and showed an improvement in the corrosion resistance for the surface modified specimens." @default.
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- W2981920007 date "2020-01-01" @default.
- W2981920007 modified "2023-09-26" @default.
- W2981920007 title "Surface alloying of aluminium bronze with chromium: Processing, testing, and characterization" @default.
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- W2981920007 doi "https://doi.org/10.1016/j.matpr.2019.09.094" @default.
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