Abstract
Technologies of additive manufacturing are increasibly used in various industries, including power engineering. It is known that the leading foreign turbo-building companies actively implement such technologies and successfully produce full-size products. Nevertheless, there are many questions related to the operation reliability of such equipment, in particular, resistance to various types of wear.
The purpose of this work was to establish the possibility of titanium alloy Ti-6Al-4V samples obtaining, which is used in turbine construction, with the help of additive technologies to solve problems on the study of their properties and comparison with similar characteristics of samples obtained by the traditional technological method.
As a result of the work, the properties of both types of samples were determined and their comparative analysis was carried out. An almost identical chemical composition of both types of samples was found to comply with the ASTM B265 standard for the Ti-6Al-4V alloy. It is shown that the hardness and microhardness of the investigated both types of samples is the same and amounted to 31 ± 5 HRC and 390 ± 10 HV0.1, respectively. The surface roughness of the «printed» samples is not less than 4 times higher than for the samples manufactured by the traditional technological method, which requires it's additional processing for further research. The microstructure of the alloy obtained by using additive technologies is acicular martensite formed as a result of rapid cooling from the high-temperature beta region.
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