MECHANISM OF THE DROP IN THE DEPENDENCE OF YIELD STRESS ON NEUTRON-IRRADIATION DOSE FOR LOW-ALLOY STEEL

Authors
NIKOLAEVA AV NIKOLAEV YA
Citation
Av. Nikolaeva et Ya. Nikolaev, MECHANISM OF THE DROP IN THE DEPENDENCE OF YIELD STRESS ON NEUTRON-IRRADIATION DOSE FOR LOW-ALLOY STEEL, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 234, 1997, pp. 915-917
Citations number
6
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
234
Year of publication
1997
Pages
915 - 917
Database
ISI
SICI code
0921-5093(1997)234:<915:MOTDIT>2.0.ZU;2-U
Abstract
In the present work, influence of irradiation on tensile and impact pr operties of Cr-Ni-Mo steel using for WWER-1000 type reactor pressure v essel (RPV) manufacturing was studied. An abnormal behavior of tensile properties of the investigated materials under irradiation was observ ed. Decrease in yield stress and ultimate tensile stress at the first stage of irradiation was revealed while ductile-to-brittle transition temperature (DBTT) was continuously increasing with damage dose. A mod el of the phenomenon considering influence of residual impurities and alloying elements on alpha-Fe lattice tetragonality under irradiation was proposed. Some experimental evidences of the model were found. Nic kel was supposed to govern the radiation sensitivity of WWER-1000 type steel. (C) 1997 Elsevier Science S.A.