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Reconstructing the austenite parent microstructure of martensitic steels: A case study for reduced-activation Eurofer steels

D. R. Almeida Junior Kahl Dick Zilnyk; Dierk Raabe; Hugo Ricardo Zschommler Sandim

Journal of nuclear materials v., n. , p.185-193, 2019

Michigan Elsevier 2019

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  • Título:
    Reconstructing the austenite parent microstructure of martensitic steels: A case study for reduced-activation Eurofer steels
  • Autor: D. R. Almeida Junior
  • Kahl Dick Zilnyk; Dierk Raabe; Hugo Ricardo Zschommler Sandim
  • Assuntos: MATERIAIS; Reduced-Activation Ferritic-Martensitic Steels; Martensitic Transformation; Ebsd; Reconstruction; Orientation Relationship; Arpge
  • É parte de: Journal of nuclear materials v., n. , p.185-193, 2019
  • Notas: Disponível em: https://doi.org/10.1016/j.jnucmat.2019.01.022. Acesso em: 12 dez. 2023
  • Descrição: A computer program was employed to reconstruct the parent microstructure from electron backscatter diffraction maps taken from martensite. The reconstruction is based on a given user-selected orientation relationship. Two reduced-activation ferritic-martensitic Eurofer steels were austenitized for several times and cooled down at different rates. Two parameters are proposed to assess the quality of the reconstruction: the relative frequency of orientations in a determined sub-portion of the Euler space and the distribution of the angular deviation from a given theoretical orientation relationship. The number of active martensitic orientation variants during the transformation depends on grain size. Coarser grains enable a greater number of active variants improving the reconstruction quality. The distributions of angular deviations reveal that the Greninger-Troiano orientation relationship is the one that best describes the martensitic transformation in both steel grades.
  • Editor: Michigan Elsevier
  • Data de criação/publicação: 2019
  • Formato: p. 185-193.
  • Idioma: Inglês
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