Estimation of Crack Detectability of Remotely Induced Current Potential Drop Technique Based on POD Curve(NDE4)

2001 ◽  
Vol 1.01.203 (0) ◽  
pp. 275-280
Author(s):  
Yasumoto SATO ◽  
Tetsuo SHOJI
Keyword(s):  
Potential Drop ◽  
Induced Current ◽  
Drop Technique ◽  
Current Potential

Automated visualization of surface morphology of cracks by means of induced current potential drop technique

2012 ◽  
Vol 49 ◽  
pp. 83-89 ◽  
Author(s):  
Yasumoto Sato ◽  
Naomi Kawaguchi ◽  
Natsuki Ogura ◽  
Tsunaji Kitayama
Keyword(s):  
Surface Morphology ◽  
Potential Drop ◽  
Induced Current ◽  
Drop Technique ◽  
Current Potential

CONTINUOUS MONITORING OF STRESS CORROSION CRACKING GROWTH IN TYPE 316L STAINLESS STEEL WELDMENT USING INDUCED CURRENT POTENTIAL DROP TECHNIQUE AT ELEVATED TEMPERATURE

2008 ◽  
Vol 22 (11) ◽  
pp. 881-886
Author(s):  
YASUMOTO SATO ◽  
TAKEO ATSUMI ◽  
TETSUO SHOJI
Keyword(s):  
Elevated Temperature ◽  
Continuous Monitoring ◽  
316L Stainless Steel ◽  
Potential Drop ◽  
Induced Current ◽  
Type 316L ◽  
Stainless Steel Weldment ◽  
Drop Technique ◽  
Type 316L Stainless Steel ◽  
Current Potential

In this study, induced current potential drop (ICPD) technique was applied to monitor SCC crack growth. The SCC crack monitored was introduced on the internal wall of a pipe specimen in which simulated BWR water flows. The measurement was performed on the external wall of the pipe specimen. It was shown that the ICPD technique permits continuous monitoring of the SCC growth, which initiates from the inner wall of the pipe specimen under elevated temperature.

scholarly journals Measuring the depth of surface cracks using alternating current potential drop technique, with suppression of the influence of the electromagnetic properties of the metal

2021 ◽  
Vol 2091 (1) ◽  
pp. 012047
Author(s):  
P N Shkatov
Keyword(s):  
Crack Depth ◽  
Potential Drop ◽  
Alternating Current ◽  
Measurement Range ◽  
Electromagnetic Properties ◽  
Surface Cracks ◽  
Measuring Techniques ◽  
Drop Technique ◽  
Current Potential

Abstract Traditional measuring techniques often lead to errors due to the need to register signals in both defective and defect-free areas. In this paper, we introduce an alternating current potential drop technique with detuning from the influence of variations in the electromagnetic properties of the metal achieved by registering a signal only at the defective site. We show that, with an appropriate choice of measurement parameters, the use of the proposed technique leads to an increase in sensitivity to the crack depth as well as to an increase in the measurement range.

General Rule of Method for Measurement of Thickness and Crack Size by Electric Potential Drop Technique: Outline of the NDIS3426:2008

2009 ◽  
Author(s):  
Yang Ju ◽  
Seiichi Hamada
Keyword(s):  
Fatigue Crack ◽  
Electric Potential ◽  
General Rule ◽  
Potential Drop ◽  
Crack Size ◽  
Pulsed Direct Current ◽  
Measurement Of Thickness ◽  
Drop Technique ◽  
Direct Current Potential Drop ◽  
Current Potential

The Japanese Society for Non-Destructive Inspection (JSNDI) published general rule of method for measurement of thickness and crack size by Electric Potential Drop Technique as the Standard of JSNDI (NDIS3426) in January, 2008. NDIS3426 was established based on the researches for many years including the round robin tests conducted as the academic activities in JSNDI, and the previous technical guideline and standard ASTM E-647-05 ANNEX A6 and BS ISO 12108:2002 established for the measurement of fatigue crack growth in specimens. In this paper, the outline and the background of NDIS3426 was described. The electric potential drop technique is one of the promising methods to monitor or measure the thickness and crack size for the practical use in many industries. For the inspection of the surface deep fatigue crack in the steam turbine casing, the advanced crack depth indicator based on the potential drop technique has been applied. For the monitoring the creep damage accumulated in the seam-welded power piping, the commercialized tool based on the pulsed direct current potential drop technique has been used. For the pipe wall thinning measurement in the operating thermal power plant, the pulsed direct current potential drop technique was applied. This paper shows the present condition of the practical use and the future prospect of the potential drop technique.

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