Embrittlement and fracture toughness of highly irradiated austenitic steels for vessel internals of WWER type reactors. Part 2. Relation between irradiation swelling and irradiation embrittlement. Physical and mechanical behavior

The mechanical test results and fractographic observations reported in Part 1 are discussed from the standpoint of possible fracture mechanisms in austenitic steels subjected to intensive neutron irradiation. We put forward the mechanisms that relate the γ →α-transformation to the occurrence of a du...

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Bibliographic Details
Published in:Strength of materials 2010-03, Vol.42 (2), p.144-153
Main Authors: Margolin, B. Z., Kursevich, I. P., Sorokin, A. A., Vasina, N. K., Neustroev, V. S.
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Deterioration
Embrittlement
Fracturing
Irradiation
Materials Science
Solid Mechanics
Steels
Swelling
Ultimate tensile strength
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Summary:The mechanical test results and fractographic observations reported in Part 1 are discussed from the standpoint of possible fracture mechanisms in austenitic steels subjected to intensive neutron irradiation. We put forward the mechanisms that relate the γ →α-transformation to the occurrence of a ductile–brittle transition in the irradiated austenitic steels and presents a criterion that defines the irradiation conditions whereby the γ →α-transformation leads to the ductile–brittle transition. Some possible reasons for the deterioration of the material ultimate strength at a very high (above 20%) level of swelling are discussed.
ISSN:0039-2316
1573-9325
DOI:10.1007/s11223-010-9201-9