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Innovative approach to ensuring the quality of gas turbine engine parts produced by selective laser sintering for UAV

Vyshnepolskyi Yevhen, Pavlenko Dmytro, Tumarchenko Larysa

Zeszyty Naukowe. Transport / Politechnika Śląska

2024

z. 124

243--260

The research objects are gas turbine engines parts, manufactured using an innovative method of additive manufacturing - selective laser sintering. The main problem solved in this work is the low quality of the surface layer and the residual porosity of the parts obtained by this method, which significantly limits their operational characteristics and durability. As a result of the experimental studies, rational operating parameters of diamond smoothing were established. This allowed to significantly improve the surface quality and increase the operational characteristics of parts made of heat-resistant alloys INCONEL 718 and an intermetallic alloy based on titanium aluminide OX45-3ODS. The effectiveness of diamond smoothing is explained by local plastic deformation and compaction of the surface layer of parts under the influence of high contact pressures and temperatures. This leads to a significant reduction in surface roughness, an increase in the surface hardness due to strain hardening and a significant reduction in the size and number of residual pores. A characteristic feature of the obtained results is the ability to control the quality parameters of the surface layer by varying the diamond smoothing operating parameters - smoothing force, feed, radius, and geometry of the smoother's working part. The established regularities of the smoothing operating parameters have an impact on the quality characteristics of the surface. This information can be utilized in the development of highly efficient technological processes for the production and restoration of gas turbine engines, critical components of unmanned aerial vehicles, obtained through selective laser sintering. Implementing the elaborated technological recommendations will permit broadening the range of goods produced by additive manufacturing and enhancing their capacity and dependability during operation under conditions of cyclical loads and extreme temperatures.

Modelowanie odkształceń mikronierownosci powierzchni wskutek uderzenia kulką

Bławucki S., Zaleski K.

Przegląd Mechaniczny

2016

nr 9

30--33

W pracy przedstawiono wyniki symulacji numerycznej oraz badań doświadczalnych! procesu konstytuowania miejscowych odkształceń sprężysto-plastycznych. Próby wykonano na elementach ze stopu aluminium EN AW-5060 T5 o zmiennych wartościach parametrów chropowatości powierzchni. Doświadczenie wykonano na stanowisku do zadawania odkształceń plastycznych i pomiaru czasu styku. Dla wybranego przypadku przeprowadzono obliczenia analityczne głębokości powstałego odcisku. Przeprowadzono symulację numeryczną uderzenia kulki w powierzchnię próbki metodą elementów skończonych w programie ABAQUS. Użyto modułu Explicit. Zauważono, że wraz ze zwiększeniem chropowatości powierzchni, wzrasta również głębokość odcisku po uderzeniu pojedynczą kulką.

The paper presents results of numerical simulation and experimental investigation of exerting local elastic-plastic deformation on surface. Tests were performed on the structures of the EN AW 6060 T6 aluminium alloy -with variable surface roughness. Experiment was conducted on stand designed for exerting elastic-plastic deformation and measuring time of contact. It were carried out analytical calculations of indentation depth for selected case of study Also numerical simulation was carried out ta king the finite element method on ABAQUS program. Explicit module was used. It were noticed, that increase of surface roughness causes rising of depth of indentation after single ball impact.