Phosphorus Segregation and Intergranular Embrittlement in Thermally Aged and Neutron Irradiated Reactor Pressure Vessel Steels

2009 ◽  
pp. 83-83-12 ◽  
Author(s):  
Yutaka Nishiyama ◽  
Kunio Onizawa ◽  
Masahide Suzuki
Keyword(s):  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Phosphorus Segregation ◽  
Intergranular Embrittlement ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

Intergranular Embrittlement of Nuclear Reactor Pressure Vessel Steels

2013 ◽  
Vol 592-593 ◽  
pp. 577-581 ◽  
Author(s):  
Oleg O. Zabusov ◽  
Boris A. Gurovich ◽  
Evgenia A. Kuleshova ◽  
Michail A. Saltykov ◽  
Svetlana V. Fedotova ◽  
...  
Keyword(s):  
Brittle Fracture ◽  
Grain Boundaries ◽  
Pressure Vessel ◽  
Nuclear Reactor ◽  
Reactor Pressure Vessel ◽  
Operating Conditions ◽  
Fracture Surfaces ◽  
Intergranular Embrittlement ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

Service life of VVER-type nuclear reactor is limited by decrease in brittle fracture resistance of reactor pressure vessel produced of low-alloy low-carbon steel under effect of irradiation and/or elevated temperatures. In this work fracture surfaces were studied by Auger-electron spectroscopy in order to estimate the contribution of intergranular embrittlement to the degradation of reactor pressure vessel steels under the influence of operating conditions. It was demonstrated that irradiation induced segregation leads to an increase of P content in grain boundaries that promotes intergranular brittle fracture on fracture surfaces. The similar effect but to a lesser degree was shown in the case of long-term temperature exposure. The grain boundary structure was examined and an effect of carbides located on the grain boundaries is supposed due to increased phosphorus segregation on carbide/matrix interface boundaries.

Thermodynamic models of low-temperature Mn–Ni–Si precipitation in reactor pressure vessel steels

2014 ◽  
Vol 4 (3) ◽  
pp. 101-105 ◽  
Author(s):  
Wei Xiong ◽  
Huibin Ke ◽  
Ramanathan Krishnamurthy ◽  
Peter Wells ◽  
Leland Barnard ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Thermodynamic Models ◽  
Pressure Vessel Steels ◽  
Image Position ◽  
Reactor Pressure

Abstract

scholarly journals 3-D Atom Probe Observation of Solute Atom Clusters in Reactor Pressure Vessel Steels

Materia Japan ◽  
2008 ◽  
Vol 47 (12) ◽  
pp. 619-619
Author(s):  
Kenji Nishida ◽  
Kenji Dohi ◽  
Akiyoshi Nomoto ◽  
Naoki Soneda
Keyword(s):  
Pressure Vessel ◽  
Solute Atom ◽  
Atom Probe ◽  
Reactor Pressure Vessel ◽  
Atom Clusters ◽  
Pressure Vessel Steels ◽  
Reactor Pressure
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