Mechanical properties and microstructure characterization of Eurofer97 steel variants in EUROfusion program

Xiang Chen; Arunodaya Bhattacharya; Mikhail A. Sokolov; Logan N. Clowers; Yukinori Yamamoto; Tim Graening; Kory D. Linton; Yutai Katoh; Michael Rieth

doi:10.1016/j.fusengdes.2019.03.158

Mechanical properties and microstructure characterization of Eurofer97 steel variants in EUROfusion program

Xiang Chen, Arunodaya Bhattacharya, Mikhail A. Sokolov, Logan N. Clowers, Yukinori Yamamoto, Tim Graening, Kory D. Linton, Yutai Katoh, Michael Rieth

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27 Scopus citations

Abstract

Under the framework of EUROfusion, we performed comprehensive mechanical and microstructure characterization of ten Eurofer97 steel variants with varying compositions and heat treatment conditions. We characterized the pre-irradiation fracture toughness of the materials along with their Vickers hardness, tensile properties, and microstructure. Compared with standard Eurofer97, the ten variants didn't show a comprehensive improvement of mechanical properties. In addition, the composition and microstructures in some variants are adverse to fracture toughness, such as low C contents, coarse grain sizes, partially tempered martensite, lack of precipitates, and non-uniform distributions of coarse precipitates. Further studies will be performed on the same materials after neutron irradiation.

Original language	English
Pages (from-to)	2227-2232
Number of pages	6
Journal	Fusion Engineering and Design
Volume	146
DOIs	https://doi.org/10.1016/j.fusengdes.2019.03.158
State	Published - Sep 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Funding

This study was supported by the U.S. Department of Energy, Office of Fusion Energy Sciences under contact DE-AC05-00OR22725 and Karlsruhe Institute of Technology under contract NFE-16-06240 with ORNL managed by UT Battelle, LLC. Materials development, production and preparation in this work, supported by the European Commission under the contract of Associations, was carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission. We would like to thank E. Manneschmidt and R. Swain from ORNL for mechanical testing. We also appreciate the review comments from L. Tan and L. Garrison at ORNL. We would like to acknowledge the colleagues who developed, produced, prepared, and provided the different steel grades: CEA (J. Henry), SCK-CEN (A. Puype, L. Malerba), ENEA (C. Cristalli, L. Pilloni), CSM (O. Tassa), KIT (J. Hoffmann), and OCAS (N. de Wispelaere).

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Battelle
Oak Ridge National Laboratory
Colorado School of Mines
Karlsruhe Institute of Technology	NFE-16-06240
European Neuroendocrine Association
UT-Battelle
European Commission
Korea Institute of Toxicology
Commissariat Ã l'Ãnergie Atomique et aux Ãnergies Alternatives
OCAS

Keywords

Eurofer97
Fracture toughness
Master curve
Mechanical properties
Small specimen testing technique

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10.1016/j.fusengdes.2019.03.158

Cite this

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title = "Mechanical properties and microstructure characterization of Eurofer97 steel variants in EUROfusion program",

abstract = "Under the framework of EUROfusion, we performed comprehensive mechanical and microstructure characterization of ten Eurofer97 steel variants with varying compositions and heat treatment conditions. We characterized the pre-irradiation fracture toughness of the materials along with their Vickers hardness, tensile properties, and microstructure. Compared with standard Eurofer97, the ten variants didn't show a comprehensive improvement of mechanical properties. In addition, the composition and microstructures in some variants are adverse to fracture toughness, such as low C contents, coarse grain sizes, partially tempered martensite, lack of precipitates, and non-uniform distributions of coarse precipitates. Further studies will be performed on the same materials after neutron irradiation.",

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doi = "10.1016/j.fusengdes.2019.03.158",

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AU - Chen, Xiang

AU - Bhattacharya, Arunodaya

AU - Sokolov, Mikhail A.

AU - Clowers, Logan N.

AU - Yamamoto, Yukinori

AU - Graening, Tim

AU - Linton, Kory D.

AU - Katoh, Yutai

AU - Rieth, Michael

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AB - Under the framework of EUROfusion, we performed comprehensive mechanical and microstructure characterization of ten Eurofer97 steel variants with varying compositions and heat treatment conditions. We characterized the pre-irradiation fracture toughness of the materials along with their Vickers hardness, tensile properties, and microstructure. Compared with standard Eurofer97, the ten variants didn't show a comprehensive improvement of mechanical properties. In addition, the composition and microstructures in some variants are adverse to fracture toughness, such as low C contents, coarse grain sizes, partially tempered martensite, lack of precipitates, and non-uniform distributions of coarse precipitates. Further studies will be performed on the same materials after neutron irradiation.

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Mechanical properties and microstructure characterization of Eurofer97 steel variants in EUROfusion program

Abstract

Bibliographical note

Funding

Keywords

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