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The development of powder metallurgy methods in recent years has caused traditional casting methods to be replaced in many industrial applications. Using such methods, it is possible to obtain parts having the required geometry after a process that saves both manufacturing costs and time. However, there are many material issues that decrease the functionality of these methods, including mechanical properties anisotropy and greater susceptibility to cracking due to chemical segregation. The main aim of the current article is to analyze these issues in depth for two powder metallurgy manufacturing processes: laser powder bed fusion (LPBF) and hot-pressing (HP) methods-selected for the experiment because they are in widespread use. Microstructure and mechanical tests were performed in the main manufacturing directions, X and Z. The results show that in both powder metallurgy methods, anisotropy was an issue, although it seems that the problem was more significant for the samples produced via LPBF SLM technique, which displayed only half the elongation in the building direction (18%) compared with the perpendicular direction (almost 38%). However, it should be noted that the fracture toughness of LPBF shows high values in the main directions, higher even than those of the HP and wrought samples. Additionally, the highest level of homogeneity even in comparison with wrought sample, was observed for the HP sintered samples with equiaxed grains with visible twin boundaries. The tensile properties, mainly strength and elongation, were the highest for HP material. Overall, from a practical standpoint, the results showed that HP sintering is the best method in terms of homogeneity based on microstructural and mechanical properties.
Czasopismo
Rocznik
Tom
Strony
art. no. e130, 2023
Opis fizyczny
Bibliogr. 42 poz., rys., tab., wykr.
Twórcy
autor
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 Str, 02-507 Warsaw, Poland
autor
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B Str, 02-106 Warsaw, Poland
autor
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 Str, 02-507 Warsaw, Poland
autor
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 Str, 02-507 Warsaw, Poland
autor
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 Str, 02-507 Warsaw, Poland
autor
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 Str, 02-507 Warsaw, Poland
autor
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 Str, 02-507 Warsaw, Poland
autor
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 Str, 02-507 Warsaw, Poland
Bibliografia
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Uwagi
PL
Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-27f90df0-5bb1-4e84-9f7b-10fcc2c6a87e