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Microstructure of Selective Laser Melted Alloy 718 in As-Manufactured and Post Heat Treated Condition
University West, Department of Engineering Science, Division of Welding Technology.ORCID iD: 0000-0002-4598-4790
University West, Department of Engineering Science, Division of Welding Technology.ORCID iD: 0000-0001-9065-0741
University West, Department of Engineering Science, Division of Welding Technology.ORCID iD: 0000-0003-2560-0531
2018 (English)In: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, p. 450-458Article in journal (Refereed) Published
Abstract [en]

Manufacturing of Alloy 718 with selective laser melting (SLM) process faces several challenges. One of the challenges is the process-induced porosities in as-manufactured SLM parts. Another challenge is the microstructure of Alloy 718 that contains a high amount of segregating elements, such as MC-type carbides and γ/Laves phase eutectics in interdendritic regions. The microstructural heterogeneity in the as-manufactured SLM part unavoidably leads to mechanical heterogeneity and hence, post-processing heat treatments become necessary to achieve a homogeneous microstructure. Therefore, by investigating various post heat treatment options the knowledge on how to decrease/eliminate these segregations will be developed. © 2018 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2018. Vol. 25, p. 450-458
Keywords [en]
Selective laser melting, Alloy 718, Process parameters, Post heat treatments
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-13921DOI: 10.1016/j.promfg.2018.06.100Scopus ID: 2-s2.0-85065659917OAI: oai:DiVA.org:hv-13921DiVA, id: diva2:1320677
Conference
8th Swedish Production Symposium, SPS 2018; Waterfront Convention CentreStockholm; Sweden; 16 May 2018 through 18 May 2018; Code 147722
Funder
VinnovaSwedish National Space BoardAvailable from: 2019-06-05 Created: 2019-06-05 Last updated: 2019-07-26Bibliographically approved

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Raza, TahiraAndersson, JoelSvensson, Lars-Erik

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