Effect of Preheating on the Residual Stress and Material Properties of Inconel 939 Processed by Laser Powder Bed Fusion

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dc.contributor.authorMalý, Martincs
dc.contributor.authorNopová, Kláracs
dc.contributor.authorKlakurková, Lenkacs
dc.contributor.authorAdam, Ondřejcs
dc.contributor.authorPantělejev, Liborcs
dc.contributor.authorKoutný, Danielcs
dc.coverage.issue18cs
dc.coverage.volume15cs
dc.date.issued2022-09-13cs
dc.description.abstractOne of the main limitations of laser powder bed fusion technology is the residual stress (RS) introduced into the material by the local heating of the laser beam. RS restricts the processability of some materials and causes shape distortions in the process. Powder bed preheating is a commonly used technique for RS mitigation. Therefore, the objective of this study was to investigate the effect of powder bed preheating in the range of room temperature to 400 °C on RS, macrostructure, microstructure, mechanical properties, and properties of the unfused powder of the nickel-based superalloy Inconel 939. The effect of base plate preheating on RS was determined by an indirect method using deformation of the bridge-shaped specimens. Inconel 939 behaved differently than titanium and aluminum alloys when preheated at high temperatures. Preheating at high temperatures resulted in higher RS, higher 0.2% proof stress and ultimate strength, lower elongation at brake, and higher material hardness. The increased RSs and the change in mechanical properties are attributed to changes in the microstructure. Preheating resulted in a larger melt pool, increased the width of columnar grains, and led to evolution of the carbide phase. The most significant microstructure change was in the increase of the size and occurrence of the carbide phase when higher preheating was applied. Furthermore, it was detected that the evolution of the carbide phase strongly corresponds to the build time when high-temperature preheating is applied. Rapid oxidation of the unfused powder was not detected by EDX or XRD analyses.en
dc.formattextcs
dc.format.extent16cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2022, vol. 15, issue 18, 16 p.en
dc.identifier.doi10.3390/ma15186360cs
dc.identifier.issn1996-1944cs
dc.identifier.orcid0000-0002-4371-2425cs
dc.identifier.orcid0000-0002-0371-8574cs
dc.identifier.orcid0000-0002-2917-0287cs
dc.identifier.orcid0000-0002-0784-9213cs
dc.identifier.orcid0000-0002-7729-4305cs
dc.identifier.orcid0000-0002-5384-8668cs
dc.identifier.other179116cs
dc.identifier.researcheridT-3876-2019cs
dc.identifier.researcheridE-2040-2012cs
dc.identifier.researcheridI-9479-2016cs
dc.identifier.researcheridF-8576-2012cs
dc.identifier.scopus24779209000cs
dc.identifier.scopus35783365900cs
dc.identifier.scopus23988874000cs
dc.identifier.urihttp://hdl.handle.net/11012/208457
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttps://www.mdpi.com/1996-1944/15/18/6360cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1944/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectlaser powder bed fusionen
dc.subjectselective laser meltingen
dc.subjectInconel 939en
dc.subjectpreheatingen
dc.subjectresidual stressen
dc.titleEffect of Preheating on the Residual Stress and Material Properties of Inconel 939 Processed by Laser Powder Bed Fusionen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-179116en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:48:42en
sync.item.modts2025.01.17 18:40:54en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav materiálových věd a inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav konstruovánícs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé povlakycs
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