1. Mechanical properties and microstructure characterization of Eurofer97 steel variants in EUROfusion program.
- Author
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Chen, Xiang, Bhattacharya, Arunodaya, Sokolov, Mikhail A., Clowers, Logan N., Yamamoto, Yukinori, Graening, Tim, Linton, Kory D., Katoh, Yutai, and Rieth, Michael
- Subjects
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FRACTURE toughness testing , *FRACTURE mechanics , *FRACTURE toughness , *VICKERS hardness , *NEUTRON irradiation , *MICROSTRUCTURE - Abstract
• Mechanical properties of ten steel variants were compared with reference Eurofer97. • Miniature multi-notch bend bars were used for transition fracture toughness testing. • No comprehensive mechanical property improvement was found from ten variants. • Structural-property correlation was discussed for selected variants. 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. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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