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Fatigue crack growth behavior of Inconel 718 produced by selective laser melting
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SYSNO ASEP 0464560 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fatigue crack growth behavior of Inconel 718 produced by selective laser melting Author(s) Konečná, R. (SK)
Kunz, Ludvík (UFM-A) RID, ORCID
Nicoletto, G. (IT)
Bača, A. (SK)Number of authors 4 Source Title Frattura ed Integrita Strutturale. - : Gruppo Italiano Frattura - ISSN 1971-8993
Roč. 35, č. 10 (2016), s. 31-40Number of pages 10 s. Language eng - English Country IT - Italy Keywords Inconel 718 ; Selective laser melting ; Microstructure ; Fatigue crack growth ; Fractography Subject RIV JL - Materials Fatigue, Friction Mechanics Institutional support UFM-A - RVO:68081723 UT WOS 000393168900004 EID SCOPUS 84951875212 DOI 10.3221/IGF-ESIS.36.04 Annotation Additive layer manufacturing has recently gained a lot of interest due to the feasibility of producing metallic components directly from a computer-aided design file of the part. Selective laser melting, one of the main additive layer manufacturing technologies, is currently capable of producing nearly ready-to-use parts made of metallic materials. Their microstructure, however, differs substantially from that produced by conventional manufacturing. That is why a detailed study and knowledge of the relation of specific microstructure, parameters of the selective laser melting process and mechanical properties is of utmost significance. This study reports on the investigation of the fatigue crack growth behavior in Inconel 718 superalloy produced by selective laser melting. The fatigue crack growth curve and the threshold values of the stress intensity factor for propagation of long cracks were experimentally determined on compact-tension specimens fabricated using a RENISHAW A250 system and the recommended processing parameters. The fatigue crack growth rates and the fatigue crack paths both in the threshold and in the Paris region were investigated. The crack propagation curves and the crack propagation threshold were compared with literature data describing the behavior of conventionally manufactured material. The mechanism of fatigue crack growth was discussed in terms of the specific microstructure produced by selective laser melting. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2017
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