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dc.contributor.authorMouralová, Kateřina
dc.contributor.authorBeneš, Libor
dc.contributor.authorBednář, Josef
dc.contributor.authorZahradníček, Radim
dc.contributor.authorProkeš, Tomáš
dc.contributor.authorFries, Jiří
dc.date.accessioned2020-06-24T07:54:20Z
dc.date.available2020-06-24T07:54:20Z
dc.date.issued2020
dc.identifier.citationCoatings. 2020, vol. 10, issue 4, art. no. 406.cs
dc.identifier.issn2079-6412
dc.identifier.urihttp://hdl.handle.net/10084/139563
dc.description.abstractDie-sinking electric discharge machining (EDM) is an indispensable technological operation, especially in the production of molds and all internal and external shapes and cavities. For this reason, the effect of machine parameter settings (open-voltage, pulse current, pulse on time, and pulse off time) on the machining of two types of steels, 1.2363 and 1.2343ESR, was carefully investigated using graphite or copper electrodes in 10 mm x 10 mm or 100 mm x 100 mm shapes. For this purpose, a two-level half factor experiment was performed with one replication at the corner points and two replications at the central points, with a total of 80 rounds. The subject of the evaluation was the topography and morphology of machined surfaces including a detailed analysis of surface and subsurface defects in the form of cracks including the creation of regression equations describing the probability of crack occurrence. Furthermore, a study of the local hardness change in the subsurface area was performed, and lamellas were also made and studied by transmission electron microscopy. It has been found that by using die-sinking EDM, it is possible to effectively predict the probability of cracking on machined surfaces and also on machine 1.2363 and 1.2343ESR steels with a very good surface quality of Ra 1.9 and 2.1 mu m using graphite electrodes. These findings will ensure the production of parts with the required surface quality without cracks, which is a crucial aspect for maintaining the required functionality and service life of the parts.cs
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofseriesCoatingscs
dc.relation.urihttp://doi.org/10.3390/coatings10040406cs
dc.rights© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectdie-sinking EDMcs
dc.subjectelectrical discharge machiningcs
dc.subjectsteelcs
dc.subjectdesign of experimentcs
dc.subjectcrackscs
dc.subjectmachining parameterscs
dc.titleAnalysis of machinability and crack occurrence of steels 1.2363 and 1.2343ESR machined by die-sinking EDMcs
dc.typearticlecs
dc.identifier.doi10.3390/coatings10040406
dc.rights.accessopenAccesscs
dc.type.versionpublishedVersioncs
dc.type.statusPeer-reviewedcs
dc.description.sourceWeb of Sciencecs
dc.description.volume10cs
dc.description.issue4cs
dc.description.firstpageart. no. 406cs
dc.identifier.wos000534630600103


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© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.
Except where otherwise noted, this item's license is described as © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.