Структура та властивості матеріалу зразків, вирощених методом селективного лазерного сплавлення з порошку сплава In718 після гарячого ізостататичного пресування та наступної термообробки

• Дата: 2023
• Автори: Клочихін, В. В., Касай, П. А., Наумик*, В. В.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Теми: селективне лазерне сплавлення (СЛС); гаряче ізостатичне пресування (ГІП); термічна обробка; механічні властивості; макроструктура; мікроструктура
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/structure-and-properties-material-samples-cultivated-selective-l
• Назва журналу: Casting Processes

JSC «Motor Sich» (Zaporizhzhia, Ukraine)*Zaporizhzhya Polytechnic National University (Zaporizhzhia, Ukraine) Received 10.01.2022 UDK 669.24.002.8:621.01 The structure and properties of the material of the samples made of IN718 alloy by selective laser malting (SLM) in different directions from the powder obtained by centrifugal spraying of IN718 after hot isostatic pressing (HIP) and subsequent heat treatment was studied. It is established that heat treatment and hot isostatic pressing (ISP) helps to increase and stabilize the strength properties. After the operation of hot isostatic pressing (HIP) and subsequent heat treatment there is an increase in the plastic characteristics of the material and the Young's modulus (E). The mechanical properties of the samples of IN718 alloy (both vertical and horizontal) tested at 20 0C significantly exceed the properties of the alloy ЕП718-ВД (ІД). The material of the samples before the operation of hot isostatic pressing (both horizontal and vertical) is characterized by the presence of microporosity with a pore size up to ~10 μm, as well as local inconsistencies at the interface with spherical particles. In addition, the samples have oxide inclusions up to ~15 μm in horizontal samples and up to ~30 μm in vertical samples. Carrying out the operation of hot isostatic pressing (HIP) with subsequent heat treatment contributes to almost complete "healing" of pores and microcontinuities concentrated in the internal volumes of the metal. At the same time, globular and (or) film oxides were detected in the "healing" zones. he microstructure of the material of the investigated samples made by the method of selective laser malting (SLM) after heat treatment, as well as after hot isostatic pressing (HIP) and subsequent heat treatment according to these modes is typical for IN718 alloy normally heat-treated state. Heat treatment contributes to a more homogeneous structure due to the alignment of the chemical composition between the zones of layered fusion. Metallographic studies of IN718 alloy samples showed that when the temperature of short-term mechanical tests increased to 700 0C there is some coarsening of the structure due to coagulation of intermetallic phases, which clearly led to some decrease, mainly strength characteristics.   Referencecs  1 Shalin, R. E., Svetlov, I. L., Kachanov, E. B., et al. (1997). Single crystals of nickel heatresistant alloys. M.: Mashinostroenie, 336 p. 2 Ilyin, A. A., Garanin, S. V., Koshkin, V. V., Filatov, A. A. (2007). Experience in using prototyping technology for the manufacture of aircraft parts. Foundry. No. 6. S. 39–41. 3 Balaka, E. V. (2011). The main factors of influence on the process of shaping parts using the technology of layer-by-layer growth (Rapid Prototyping). High technologies in machinebuilding: sb. Sciences. prats. Kharkiv: NTU “KhPI”. VIP. 1 (21). pp. 29–36 4 Gnatenko, M. et al. (2019). Detecting the influence of heat sources on material properties when prodaction aviation parts by a direct energy deposition method. Eastern-European Journal of Enterprise Technologies. No 1 (12). 49–55. 5 Hohmann, M., Brooks, G., Spiegelhauer, C. (2005). Production methods and applications for high-quaIity metaI powders and sprayformed product. Produktions methoden und Anwendungen fur qualitativ hochwertige Metallpulver und spruhkompaktierte Halbzeuge. Stahl und Eisen, 125. No 4. 125 p.6 Tsantrizos, P. G. et. al. Method of production of metal and ceramic powders by plasma atomization. Pat. US № 5707419, date of issue: 13 Jan1998.7 Zlenko, M.A., Nagaitsev, M.V., Dovbysh, V.M. (2015). Additive technologies in mechanical engineering. Handbook for engineers. M.: SSC RF FSUE "NAMI", 220 p.8 Yasa E. et al. (2011). The investigation of the influence of laser remelting on density, surface quality and microstructure of selective laser melting parts. Rapid Prototyping Journal. Vol. 17. Iss: 5. Р. 312 –327.9 Klochikhin, V. V., Rud, N. D., Naumik, V. V., Chigileichik, E. V. (2017). Influence of the powder fusion vector on the properties of samples made by additive technology. Technological systems. No. 3. P. 70–81.10 Klochikhin, V. V., Kasai, P. O., Balushok, K. B., Shilo, V. G., Naumik, V. V. (2021). Investigation of the quality of the material of the samples obtained by the method of selective laser fusion (SLM) from IN718 alloy powder. Casting processes. No. 2 (14413), pp. 13–23.11 Aviation materials [Text]: reference book / Ed. R.E. Shalina. 6th ed., revised. and additional M.: ONTI, 1989. S. 182–193.12 Sims, C. Heat-resistant alloys [Text] / C. Sims, W. Hagel. Moscow: Metallurgiya, 1976, pp. 107–13