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This analysis compares the effects of carbon nanotubes on microstructure and mechanical properties in Al-Mg alloys, suggesting potential benefits in hardness.
On the basis of the arc metal welding deposition process the technology for carbon nanotube (CNT) addition to metal was developed. It uses extruded metal rods with CNTs as additional material. During this study the developed technology was applied for modification of metal Al-5Mg alloy. Comparison of the macro- and microstructure for metal obtained by the developed technology with CNTs and without modification shows no strong difference for modified and not modified metal. Nevertheless CNTs were observed in modified metal with use of SEM and analysis of microhardness showed that addition of CNT increased microhardness in upper layers of deposited metal.
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Isupov et al. (2020) studied this question.
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