Correlation of yield stress and microhardness in 08Cr16Ni11Mo3 stainless steel irradiated to high dose in the BN-350 fast reactor

• Published in: Journal of nuclear materials Vol. 359; no. 3; pp. 258 - 262
• Main Authors: Gusev, M.N., Maksimkin, O.P., Tivanova, O.V., Silnaygina, N.S., Garner, F.A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.12.2006; Elsevier
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fission nuclear power plants; Installations for energy generation and conversion: thermal and electrical energy; S0500; F0200; S0700; M0300; N0100; R0300; Sodium; Stainless steel; Fast reactor; High temperature; Yield stress; High dose; Microhardness; Chromium Nickel Molybdenum Alloys; Nuclear reactor
• ISSN: 0022-3115; 1873-4820
• DOI: 10.1016/j.jnucmat.2006.09.005

The relationship between the microhardness and the engineering yield stress in 08Cr16Ni11Mo3 steel after irradiation in the BN-350 reactor has been experimentally derived and agrees with a previously published correlation developed by Toloczko for unirradiated 316 in a variety of cold-work conditions. Even more importantly, when the correlation is derived in the K Δ format where the correlation involves changes in the two properties, excellent agreement is found with a universal K Δ correlation developed by Busby and coworkers. Additionally, this report points out that microhardness measurements must take into account that sodium exposure at high temperature and neutron fluence alters the metal surface to produce ferrite, and therefore the altered layers should be removed prior to testing.