scholarly journals Introduction to Symposium on Crack Growth Behavior and Performance of Structural Components Susceptible to Stress Corrosion Cracking

1986 ◽  
Vol 108 (1) ◽  
pp. 1-1 ◽  
Author(s):  
R. M. Horn
Keyword(s):  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Growth Behavior ◽  
Corrosion Cracking ◽  
Crack Growth Behavior ◽  
Structural Components ◽  
And Performance

Continuity of Environmentally Assisted Fatigue and Stress Corrosion Cracking Based on Short Crack Growth Behavior of 316 Stainless Steel in Simulated PWR Primary Water

2017 ◽  
Author(s):  
Choongmoo Shim ◽  
Yoichi Takeda ◽  
Tetsuo Shoji
Keyword(s):  
Stainless Steel ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Water Environment ◽  
Growth Behavior ◽  
Corrosion Cracking ◽  
Short Crack ◽  
Crack Growth Behavior ◽  
Primary Water

Environmental correction factor (Fen) is one of the parameters to evaluate the effect of a pressurized high temperature water environment. It has been reported that Fen for stainless steel saturates at a very low strain rate. However, the relationship between environmentally assisted fatigue (EAF) and stress corrosion cracking (SCC) is still unclear. The aim of this study is to investigate the short crack growth behavior and possible continuity of EAF and SCC at very low strain rates. Short crack initiation and propagation have similar behaviors, which retard the crack growth between 100–200 μm in depth. We find that the striation spacing correlates well with the maximum crack growth rate (CGR) data. Based on the correlation, it is clarified that the local CGR on an intergranular facet was faster than that on a transgranular facet. Furthermore, the overall maximum and average CGR from the EAF data is well interpreted and compared with the SCC data.

532 Evaluation of crack growth behavior by stress corrosion cracking based on non-linear fracture mechanics

2013 ◽  
Vol 2013.62 (0) ◽  
pp. 323-324
Author(s):  
Naohiro SHIZUOKA ◽  
Tomoyuki FUJII ◽  
Keiichiro TOHGO ◽  
Yoshinobu SHIMAMURA ◽  
Masahiro TAKANASHI ◽  
...  
Keyword(s):  
Fracture Mechanics ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Growth Behavior ◽  
Corrosion Cracking ◽  
Crack Growth Behavior ◽  
Linear Fracture Mechanics ◽  
Linear Fracture ◽  
Non Linear

CRACK GROWTH BEHAVIOR FOR STRESS CORROSION CRACKING OF 690 ALLOY IN HIGH TEMPERATURE WATER

2011 ◽  
Vol 46 (10) ◽  
pp. 1267-1274 ◽  
Author(s):  
Tichun DAN ◽  
Zhanpeng LU ◽  
Jianqiu WANG ◽  
Enhou HAN ◽  
SHOJI Testuo ◽  
...  
Keyword(s):  
High Temperature ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Growth Behavior ◽  
Corrosion Cracking ◽  
Crack Growth Behavior ◽  
High Temperature Water ◽  
Temperature Water

Simulation of Stress Corrosion Cracking in ICM Housing of Nuclear Power Plant

2012 ◽  
Author(s):  
Masanori Kikuchi ◽  
Yoshitaka Wada ◽  
Kazuhiro Suga ◽  
Fuminori Iwamatsu ◽  
Yuichi Shintaku
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Growth Behavior ◽  
Corrosion Cracking ◽  
Stress Fields ◽  
Crack Growth Behavior ◽  
Residual Stress Field

It has been reported that stress corrosion cracking damaged in-core monitor housing (ICM Housing), which occurred in a weld heat-affected zone because of the existence of residual stress. So it is important to evaluate crack growth behavior with high accuracy. In this study, crack growth behavior in ICM Housing is estimated using S-version FEM (S-FEM), which allows generation of the core finite model and the detailed mesh representing the crack independently. At first, axial, slant and circumferential surface cracks are assumed at two locations where residual stress fields are different from each other. One is isotropic residual stress field, and the other is circumferential residual stress field. It is shown that crack growth behaviors are different under different residual stress fields. Next, the effect of the slit, which exists between the ICM Housing and the Pressure Vessel is evaluated. It is shown that the existences of the slit increases stress intensity factors of growing surface crack. Finally S-FEM results are compared with those of the Influence Function Method (IFM), which assumes that an elliptical crack shape exists in a plate. It is shown that IFM result is conservative comparing to that of S-FEM.

Crack Branching and Its Effect on Environmentally Assisted Cracking in High Temperature Water Environments

2010 ◽  
Author(s):  
Zhanpeng Lu ◽  
He Xue ◽  
Tetsuo Shoji
Keyword(s):  
High Temperature ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Crack Tip ◽  
Corrosion Cracking ◽  
Crack Growth Behavior ◽  
Crack Branching ◽  
High Temperature Water ◽  
Temperature Water

Crack kinking or branching has been observed in laboratory stress corrosion cracking tests and in some components suffering from stress corrosion cracking in nuclear power plant coolants. There are several types of crack branching: i.e., macroscopic multiple branching cracks, local crack branching or the combination of both. Crack branching affects the crack tip stress/strain distribution in terms of stress intensity factor and crack tip strain rate, and consequently affects crack growth behavior. The crack tip mechanical fields in some typical crack branching systems are quantified using empirical, analytical and numerical simulation methods. The effect of crack branching is less significant in contoured double cantilever beam specimens than in compact tension specimens for the same size and configuration of branched cracks. The applications of the analysis results to some observed crack branching phenomena of austenitic alloys in high temperature water environments are discussed based on the theoretical crack growth rate formulation.

Experimental Study on Crack Growth Behavior for Austenitic Stainless Steel in High Temperature Pure Water

1986 ◽  
Vol 108 (2) ◽  
pp. 226-233 ◽  
Author(s):  
M. Hishida ◽  
M. Saito ◽  
K. Hasegawa ◽  
K. Enomoto ◽  
Y. Matsuo
Keyword(s):  
Stainless Steel ◽  
Crack Propagation ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Surface Crack ◽  
Stress Ratio ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Surface Crack Growth

Crack growth behavior of Type 304 stainless steel in a simulated BWR water environment was investigated for the quantitative characterization of subcritical flaw growth in BWR piping systems. Crack propagation rates under corrosion fatigue and stress corrosion cracking were generated using compact specimens. The effects of several parameters on the rates were discussed. Furthermore, surface crack growth behavior was examined under different modes of cyclic loading, and results were discussed in comparison with compact specimen data. The corrosion fatigue crack propagation rates strongly depended on the frequency and the stress ratio. The rates became higher as the frequency lowered and the stress ratio increased. No effect from dissolved oxygen concentration and heat treatment of the steel was observed in tests, where transgranular cracking mainly took place. Stress corrosion cracking rate data indicated KISCC was above 15 MPa•m1/2. On the other hand, surface crack growth behavior included scattered crack propagation rates. However, the relationship between da/dN and ΔK was basically similar to that obtained in the compact specimens, except under given test conditions, where the acceleration for the crack growth rate at a crack tip on the panel surface was different from that at the deepest point.

Effects of Cold-Work Degree on Stress Corrosion Cracking Behavior of Alloy 600 in Simulated Boiling Water Reactor (BWR) Water Environments

CORROSION ◽  
10.5006/3426 ◽  
2020 ◽  
Vol 76 (10) ◽  
pp. 930-940
Author(s):  
Wen-Feng Lu ◽  
Jiunn-Yuan Huang ◽  
Tai-Cheng Chen ◽  
Kun-Chao Tsai
Keyword(s):  
Grain Boundary ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Cold Work ◽  
Growth Behavior ◽  
Corrosion Cracking ◽  
Boiling Water ◽  
Alloy 600 ◽  
Cracking Behavior

The growth behavior of stress corrosion cracking (SCC) of Alloy 600 with different cold-work levels was investigated in simulated boiling water reactors water environments. In addition, a correlation of cold-work levels, grain boundary characteristic, and the SCC growth behavior of Alloy 600 were studied. The results show that grains with high residual strain caused by cold work provide transgranular crack growth paths. The SCC growth rates of the specimens also increase with an increase in the degree of cold work and decrease remarkably after switching to the hydrogen water chemistry environment. Grain boundary character proves to be a factor more important than the localized strain concentration at the grain boundary in terms of its role in the intergranular crack growth rate of the Alloy 600 with a cold-work degree from 20% to 30%.

Simulation of Stress Corrosion Cracking in In-Core Monitor Housing of Nuclear Power Plant

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Yuichi Shintaku ◽  
Fuminori Iwamatsu ◽  
Kazuhiro Suga ◽  
Yoshitaka Wada ◽  
Masanori Kikuchi
Keyword(s):  
Residual Stress ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Growth Behavior ◽  
The Other ◽  
Stress Fields ◽  
Crack Growth Behavior ◽  
Surface Cracks ◽  
Weld Area

In the in-core monitor (ICM) housing of a reactor pressure vessel (RPV), residual stress has been widely reported to cause stress corrosion cracking (SCC) damage in the weld heat-affected zone. For this reason, it is important to evaluate the crack growth conservatively, and with high confidence to demonstrate fitness for service. This paper presents crack growth simulations in an ICM housing, which is welded at two different angles to the RPV. One weld angle is at the bottom of the RPV, and the welding area of the ICM housing is axisymmetric. The other angle is at the curved position of the RPV, and the weld area of the ICM housing is asymmetric. In these weld areas, crack growth behavior is estimated by superposed-finite element method (S-FEM), which allows generation of a global finite model and a detailed local mesh representing the crack independently. In the axisymmetric weld area, axial, slant and circumferential surface cracks are assumed at two locations where the residual stress fields are different from each other: one is isotropic and the other is circumferential. It is shown that crack growth behaviors are different under different residual stress fields. The results of S-FEM are compared with those of the influence function method (IFM), which assumes that an elliptical crack shape exists in a plate. It is shown that the IFM result is conservative compared to that of S-FEM. Next, an axial surface crack is assumed at the uphill, downhill, and midhill asymmetric weld areas. The midhill crack growth behavior is different from the uphill and downhill behaviors. Finally, two surface cracks are simulated in the asymmetric weld area and two initial crack arrangements are assumed. These results show the differences of the crack interaction and the crack growth process.

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