Abstract
Weld and surface properties of Al 1100 alloy by incorporating graphene nanoparticles, different varieties of graphite and CNTs interlayer has been studied here. The incorporation of different carbonaceous interlayers was achieved by drop casting and alloy plates were joined together by resistance spot welding technique. A single optimum welding current and time parameter was chosen by trial and error method. Lap shear tests were carried out to find the peak load bearing strengths of the alloy plates processed at the constant welding current and time conditions and a comparison of the weld strength is made. Highest load bearing capacity was exhibited by the base material as compared to that of carbonaceous nanoparticles. Microstructural characterization was done by optical microscopy and SEM. XRD was carried out to find the formation of any intermetallics or phases during the processing. Fractography was studied to analyze the underlying fracture mechanism. Micro-hardness of the Al samples processed with different carbonaceous reinforcements was found out and the maximum hardness was exhibited by the finer sized carbon nanoparticles. A comparative study is being made between the various carbonaceous nanoparticles employed here.
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