Title: Characterisation of As-Cast Model Mn-Si-Cr-Ni Steels for Reactor Pressure Vessel Applications
Citation: Energy Materials: Material Science and Engineering for Energy Systems vol. 3 no. 1 p. 32-34
Publication Year: 2008
JRC N°: JRC48484
ISSN: 1748-9237
URI: http://www.ingentaconnect.com/content/maney/ema
DOI: 10.1179/174892408X390429
Type: Articles in periodicals and books
Abstract: Initial results are reported from a study aimed to investigate the role and influence of the elements Cr, Ni, Mn and Si on the radiation stability of reactor pressure vessel steels. Twelve as cast model ferritic steels with basic composition typical of those used in Russian WWER-1000 and Western PWR reactor pressure vessel materials were subjected to Charpy impact, magnetic Barkhausen noise (MBN), Vickers hardness tests and SEM examination. Higher Cr content in model steels was found generally to give increased RMS values independent of Mn and Si contents. The ductile¿ brittle transition temperatures (DBTT) and hardness values of the model steels were found to be independent of composition. Two steels, with low concentration of Ni and high concentration of Cr or vice versa, showed high transition temperatures (216 and 242oC respectively). An additional heat treatment to improve the properties is being considered for these compositions. The correlation between DBTT and MBN results has potential for rapid determination of the effect of composition and irradiation on the steel properties. The next stage of the assessment will investigate the effect of irradiation of the model steels to accumulated neutron fluences of ,10to19 cm22.
JRC Directorate:Energy, Transport and Climate

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