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Grain boundary character distribution in an additively manufactured austenitic stainless steel
journal contribution
posted on 2021-02-01, 00:00 authored by Majid Laleh, Anthony E Hughes, Mike Yongjun TanMike Yongjun Tan, Gregory S Rohrer, Sophie Primig, Nima HaghdadiThe grain boundary character distribution (GBCD) in an austenitic stainless steel produced by additive manufacturing (AM) in both as-built and annealed conditions was studied. Relatively fine grains and a non-fibre texture was achieved by AM, and as-built structure showed a high population of Σ3 boundaries. A five-parameter GBCD analysis revealed that the microstructure is mostly dominated by highly incoherent Σ3 boundaries. The grain boundary network also consisted of random high angle, coherent Σ3s terminating on (111) planes with a pure twist character, and tilt Σ9 boundaries. The findings show prospects for the possibility of engineering the grain boundary network of materials in-situ, via the stress and heat induced by the thermal cycles during AM.
History
Journal
Scripta MaterialiaVolume
192Pagination
115 - 119Publisher
ElsevierLocation
Oxford, Eng.Publisher DOI
ISSN
1359-6462Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2020, Acta MaterialiaUsage metrics
Categories
Keywords
Grain boundary engineeringAdditive manufacturingAustenitic stainless steelScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceHIGH-STRENGTHEVOLUTIONMechanical EngineeringCondensed Matter Physics
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