Analysis of Failure Process of Maraging Steel Produced by Selective Laser Melting (SLM)

• Autorzy: Piekło Jarosław , Garbacz-Klempka Aldona

Identyfikatory

DOI

10.24425/amm.2022.139710

• Języki publikacji: EN

Abstrakty

EN

An investigation of the failure process of maraging steel grade X3NiCoTi18-9-5 produced by the SLM method that is subjected to various three-dimensional stress-states has been carried out. In this paper, deformations and damage evolution are analysed experimentally and numerically. Three microstructures of the SLM steel were obtained after the appropriate heat treatment. Tensile tests of smooth specimens and axisymmetric notched specimens have been performed. Numerical models of the samples with ring notches were made in order to determine the stress state and displacement field in the notch area at the moment of the sample’s breakage as well as to compare the experimentally determined effective strain in the notch after the sample’s breakage with the deformation being calculated on the basis of the numerical solution. As a result of the research, it was found that the type of fracture of samples obtained from X3NiCoTi18-9-5 steel powder by the SLM method depends on the size of the ring notch’s radius. Based on the performed numerical calculations and experimental tests, it was found that, for each of the analysed variants of heat treatment, it was possible to indicate the approximate limit value of triaxiality factor T_f, above which there is a scrap of brittle X3NiCoTi18-9-5 steel produced by the SLM method. This value is determined by the characteristic bending of the function that determines the relationship between triaxiality factor T_f and effective strain e_eff.

Słowa kluczowe

EN

Selective Laser Melting; maraging steel; heat treatment; metalography; mechanical properties; computer modelling

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2022
• Tom: Vol. 67, iss. 3
• Strony: 1107--1116
• Opis fizyczny: Bibliogr. 26 poz., fot., rys., tab.

Twórcy

autor

Piekło Jarosław

• AGH University of Science and Technology, Faculty of Foundry Engineering, Al. Mickiewicza 30, 30-059 Kraków, Poland

• https://orcid.org/0000-0003-3105-184X

autor

Garbacz-Klempka Aldona

• AGH University of Science and Technology, Faculty of Foundry Engineering, Al. Mickiewicza 30, 30-059 Kraków, Poland

• https://orcid.org/0000-0001-8417-6131

Bibliografia

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Uwagi

1. This research was supported by the National Centre for Research and Development in the framework of “Ścieżka dla Mazowsza”. This program is under the project “Development and commissioning of an innovative die-casting technology with the use of targeted crystallization used to improve the quality of the structure and surface of small-sized details” No. MAZOWSZE/0011/19.

2. Thanks to the RCiT company from Radom, Poland, for their cooperation and for enabling the production of samples that were necessary for the implementation of our research.

3. Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).