article.page.titleprefix
Effect of solution heat treatment on the microstructure and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam

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dc.contributor.authorDoğu, Merve Nur
dc.contributor.authorÖzer, Seren
dc.contributor.authorYalçın, Mustafa Alp
dc.contributor.authorDavut, Kemal
dc.contributor.authorBilgin, Mert Güney
dc.contributor.authorObeidi, Muhannad Ahmed
dc.contributor.authorBrodin, Håkan
dc.contributor.authorGu, Hengfeng
dc.contributor.authorBrabazon, Dermot
dc.date.accessioned2023-12-13T12:29:08Z
dc.date.available2023-12-13T12:29:08Z
dc.date.issued2023-05-19
dc.descriptionOpen Access, Published by Journal of Materials Research and Technology, https://doi.org/10.1016/j.jmrt.2023.05.152, Merve Nur Doğu, Muhannad Ahmed Obeidi, Dermot Brabazon, Form, the SFI Research Centre for Advanced Manufacturing, Dublin City University, Dublin, Ireland, School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin, Ireland, Advanced Processing Technology Research Centre, Dublin City University, Dublin, Ireland, Mustafa Alp Yalçın, Metal Forming Center of Excellence, Atılım University, Ankara, Turkey, Seren Ozer, Department of Metallurgical and Materials Engineering, Atılım University, Ankara, Turkey, Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey, Güney Mert Bilgin, Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey, Kemal Davut, Department of Materials Science and Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey, Håkan Brodin, Siemens Energy AB, Slottsvägen 2-6, 612 83 Finspång, Sweden, Hengfeng Gu, Ansys Inc., 1441 W Ute Blvd, Suite 335, Park City, UT 84098, USA, Corresponding author Merve Nur Doğu: mervenur.dogu@dcu.ie
dc.description.abstractThe effect of various solution heat treatment temperatures (i.e., 1120, 1160, 1200 and 1240 °C) on the microstructure, grain morphology and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam (PBF-LB) was investigated. Microstructural analyses showed that the high-temperature gradient and rapid solidification of the PBF-LB processing caused different resulting microstructures compared to conventionally produced counterparts. The melt pool morphologies and laser scanning paths were examined in the as-fabricated samples in the XZ- and XY-planes, respectively. After the application of solution heat treatment at 1120 °C, the as-fabricated PBF-LB initial microstructure was still apparent. For solution heat treatments of 1200 °C and above, the melt pool and scanning path morphologies disappeared and converted into a mixture of columnar grains in the XZ-plane and equiaxed grains in the XY-plane. On the other hand, large equiaxed grains were observed when the samples were solutionized at 1240 °C. Additionally, γ' phase precipitated within the matrix after all solution heat treatment conditions, which led to increase in the microhardness values. According to electron backscatter diffraction (EBSD) analyses, both as-fabricated and solution heat-treated samples had intense texture with {001} plane normal parallel to the building direction. The first recrystallized grains began to appear when the samples were subjected to the solution heat treatment at 1160 °C and the fraction of the recrystallized grains increased with increasing temperature, as supported by kernel average misorientation (KAM) and grain spread orientation (GOS) analyses.
dc.description.sponsorshipThis publication has emanated from research supported by a research grant from Science Foundation Ireland (SFI) under grant number 16/RC/3872 and is co-funded under the European Regional Development Fund.
dc.identifier.citationhttp://hdl.handle.net/20.500.14411/1895
dc.identifier.issn2238-7854
dc.identifier.urihttps://doi.org/10.1016/j.jmrt.2023.05.152
dc.language.isoen
dc.publisherJournal of Materials Research and Technology
dc.relation.ispartofseries24
dc.subjectSolution heat treatment, PBF-LB, IN939, Microstructure, Texture, Recrystallization
dc.titleEffect of solution heat treatment on the microstructure and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam
dc.typeArticle
dspace.entity.typeArticle

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