Monitoring of fatigue crack shape change in elevated temperature water by DC potential drop method

1998 ◽  
Vol 31 (1) ◽  
pp. 66 ◽  
Keyword(s):  
Fatigue Crack ◽  
Elevated Temperature ◽  
Shape Change ◽  
Potential Drop ◽  
Crack Shape ◽  
Drop Method ◽  
Dc Potential ◽  
Temperature Water

scholarly journals Detection of Configuration of Surface Fatigue Crack in Inside of Stainless Steel Pipe by DC Potential Drop Method

1986 ◽  
Vol 35 (395) ◽  
pp. 936-941 ◽  
Author(s):  
Makoto HAYASHI ◽  
Masahiro OHTAKA ◽  
Kunio ENOMOTO ◽  
Tsukasa SASAKI ◽  
Toshikazu KIKUCHI
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Potential Drop ◽  
Steel Pipe ◽  
Drop Method ◽  
Surface Fatigue ◽  
Dc Potential ◽  
Stainless Steel Pipe ◽  
Surface Fatigue Crack

NDT of Cavity Defect in Metallic Plate Using dc Potential Drop Method

2018 ◽  
Vol 46 (2) ◽  
pp. 20170092
Author(s):  
Xiaojuan Wang ◽  
Wenlu Cai ◽  
Zhenmao Chen
Keyword(s):  
Potential Drop ◽  
Metallic Plate ◽  
Drop Method ◽  
Dc Potential

DC potential drop method for evaluating material degradation

2004 ◽  
Vol 18 (8) ◽  
pp. 1368-1374 ◽  
Author(s):  
Chang-Sung Seok ◽  
Bong Kook Bae ◽  
Jae-Mean Koo
Keyword(s):  
Potential Drop ◽  
Material Degradation ◽  
Drop Method ◽  
Dc Potential

Observation of Fatigue Crack Initiation and Propagation for Carbon and Low-Alloy Steels in Oxygenated Water at Elevated Temperature

2006 ◽  
Author(s):  
Makoto Higuchi ◽  
Katsumi Sakaguchi
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Elevated Temperature ◽  
Crack Initiation ◽  
Fatigue Crack Initiation ◽  
Low Alloy Steels ◽  
Test Conditions ◽  
Alloy Steels ◽  
Crack Initiation Life ◽  
Temperature Water

Low cycle fatigue life of structural materials in LWR plants decreases remarkably in elevated temperature water depending on strain rate, temperature, water chemistry and material properties. The maximum reduction rate in fatigue life for carbon and low alloy steels is over 100 in severe conditions. Fatigue life is composed of fatigue crack initiation life and consequent propagation life. It is important to know the proportion of crack initiation life to propagation life in water environment when developing a model to estimate fatigue crack initiation life. The beachmark imprinting method was used to monitor fatigue crack initiation and consequent propagation. Environmental test conditions varied widely from severely accelerated conditions of high temperature and dissolved oxygen to mild conditions of lower temperature and oxygen. Fatigue crack initiation life could be determined using the beachmark imprinting method for all test conditions. Based on obtained test results, the susceptibility of each parameter in NWC and the relationships between NWC/NW and environmental fatigue life correction factor Fen under various conditions are discussed, but a good relationship could not be detected due to widely scattered data and a model to predict fatigue crack initiation life could not be proposed.

Sign in / Sign up

Export Citation Format

Share Document