Research demonstrates enhanced mechanical properties in structural aluminum alloys produced by selective laser melting, implying these methods could outperform traditional techniques.
Complex methods for studying the structure, mechanical and shock-wave properties of aluminum alloys of the Al-Si-Mg (AK9ch type) and Al-Cu-Mg-Si (AK6 type) systems, obtained by selective laser melting (SLM). For each composition, synthesis modes were selected to obtain defect-free samples using the laser energy density criterion. It has been established that due to the implementation of nonequilibrium crystallization conditions – high temperature gradients and the cooling rate of melts, an anomalous hierarchical structure is formed during SLS, consisting of micron grains of Al solid solution with a cellular-dendritic substructure of an order of magnitude smaller in size. Hardness and mechanical properties in static and quasi-static ranges of deformation rates of SLS alloys were measured and their significant increase by 2–2.5 times was shown in comparison with analogs obtained by traditional technologies. Shock-wave properties of samples from AK6 alloy with different topology of pore channels were studied.
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Brodova et al. (2025) studied this question.
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