Production of the VZh159-BrKhTsrT Multi-Material Using Selective Laser Melting Method

The use of multiple materials in the design and manufacturing of components enhances their operational characteristics. The application of additive technologies is promising for creating complex multi-material products. There are prospects for producing multi-material components from heat-resistant alloys, including nickel alloys, for the aerospace industry. The aim of this study was to investigate the influence of printing parameters using selective laser melting on the porosity and structure of bronze alloy BrKhTsrT V and VZh159, including the effect of heat treatment on the structure, chemical and phase composition, and the hardness of the transition zone in multi-materials. Multi-material samples were manufactured using an SLM 280HL selective laser melting system. Various regimes were used to study the impact of printing parameters on the porosity in the transition zone of the multi-material samples. On the basis of results of the conducted research, the following conclusions were drawn: only a significant increase in energy leads to a reduction in porosity in the transition zones of multi-material samples. Heat treatment according to regimes characteristic of the BrKhTsrT V alloy and the VZh159 alloy does not have a significant effect on the microstructure and chemical composition of the transition zones. The sizes of the transition zones were evaluated, measuring 300 µm when building the BrKhTsrT V alloy on VZh159 and 250 µm when building the VZh159 alloy on BrKhTsrT V, respectively. After heat treatment typical for each alloy, peaks corresponding to the phases of both alloys are observed in the transition zones. Different heat treatments significantly affect the microhardness of the alloys for which they are standard.