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Microstructural Characterization of AS-Manufactured and Heat Treated Electron Beam Melted Inconel 718
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
AB Sandvik Coromant, Sandviken.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
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2016 (English)In: Materials Science and Technology 2016 (MS&T16): Proceedings, Warrendale, PA: Materials Science & Technology , 2016, 105-112 p.Conference paper (Refereed)
Abstract [en]

As manufactured and heat treated electron beam melted Inconel 718 exhibit inhomogeneous grain morphologies, mainly equiaxed close to the surface and more elongated columnar grains in the bulk. Different processing settings i.e., contouring in the surface region and hatching in the bulk region are responsible for differences in grain morphologies and textures, which are characterized using the SEM techniques electron contrast channeling imagine (ECCI) and electron backscattering diffraction (EBSD). Niobium carbides prefer to nucleate at TiN and are found to be in the grain growth direction. Regarding processing conditions, defects, such as porosities and segregations are discussed, as well as differences in microstructure emphasizing on grain morphologies and precipitates with regards to heat treatment and hardness indentation.

Place, publisher, year, edition, pages
Warrendale, PA: Materials Science & Technology , 2016. 105-112 p.
Keyword [en]
Electron beam melting, IN718, microstructure, texture, hardness
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-132646OAI: oai:DiVA.org:liu-132646DiVA: diva2:1047861
Conference
Materials Science and Technology 2016 (MS&T16), Salt Lake City, USA October 23-27, 2016
Available from: 2016-11-18 Created: 2016-11-18 Last updated: 2016-12-02Bibliographically approved

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Deng, DunyongSaarimäki, JonasPeng, RuBrodin, HåkanMoverare, Johan
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