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Investigations of γ′, γ′′ and δ precipitates in heat-treated Inconel 718 alloy fabricated by selective laser melting

Cao, G. H ; Sun, T. Y ; Wang, C. H ; Li, Xing ; Liu, M ; Zhang, Z. X ; Hu, P. F ; Russell, Alan M ; Schneider, R ; Gerthsen, D ; Zhou, Z. J ; Li, C. P ; Chen, G. F

Iowa State University Digital Repository 2018

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  • Título:
    Investigations of γ′, γ′′ and δ precipitates in heat-treated Inconel 718 alloy fabricated by selective laser melting
  • Autor: Cao, G. H ; Sun, T. Y ; Wang, C. H ; Li, Xing ; Liu, M ; Zhang, Z. X ; Hu, P. F ; Russell, Alan M ; Schneider, R ; Gerthsen, D ; Zhou, Z. J ; Li, C. P ; Chen, G. F
  • Assuntos: Inconel 718 ; Materials Science and Engineering ; Metallurgy ; Microstructure ; Nickel alloys ; Selective laser melting ; Transmission electron microscopy (TEM)
  • Notas: Materials Science and Engineering Publications
  • Descrição: Inconel 718 alloy samples were fabricated by selective laser melting (SLM). Microstructure and precipitation in solution-heat-treated- and double-aging-SLM-made Inconel 718 were studied by scanning and transmission electron microscopy. Electron microscope observations showed that disc-shaped and cuboidal γ′′, and circular γ′ precipitates with an average size of 10–50 nm developed within cellular γ austenite matrix. The simulated, experimentally observed electron diffraction patterns, and dark-field imaging further revealed that the precipitation of three variants of γ′′ in the γ matrix occurred. The coarser acicular γ′′, and globular as well as plate-like δ phases precipitated at grain boundaries and also within the interior of austenite matrix. The morphology, distribution and crystallography of these precipitates and their formation mechanisms were analyzed and discussed.
  • Editor: Iowa State University Digital Repository
  • Data de criação/publicação: 2018
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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