Effect of Neutron Irradiation on Brittle Fracture Initiation in VVER-1000 Reactor Pressure Vessel Materials

被引：2
|
作者：
Kuleshova, E. A. [1 ]
Artamonov, M. A. [1 ]
Erak, A. D. [1 ]
机构：
[1] Kurchatov Inst, Natl Res Ctr, Kurchatov Sq 1, Moscow 123182, Russia
来源：
MATERIALS PERFORMANCE AND CHARACTERIZATION | 2014年 / 3卷 / 03期
关键词：
reactor pressure vessel steel; fracture toughness; critical stress-intensity factor K-Jc; cleavage initiation distance; fracture origin; brittle fracture; neutron irradiation;
D O I：
10.1520/MPC20130078
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work contains fractographic analysis of base metal and weld metal specimens of a VVER-1000 reactor pressure vessel (RPV) in initial state and after neutron irradiation. In this work, two main types of brittle fracture origins were discovered for VVER-1000 RPV materials in different states-nonmetallic inclusions and grain or subgrain boundaries, as well as the correlation between the cleavage initiation distance and critical stress-intensity factor K-Jc values for each type of fracture origin. In this paper, evolution of relative proportion between these two types of origins under neutron irradiation was also studied.
引用
收藏
页码：342 / 354
页数：13
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