An Alternative Data Evaluation Technique for Detecting Disposal Site Leakage Events

2009 ◽  
pp. 391-391-20
Author(s):  
RH Plumb
Keyword(s):  
Data Evaluation ◽  
Disposal Site ◽  
Evaluation Technique

Hyperbolic Model Based Data Evaluation for Magnetic NDE Measurements

2008 ◽  
Vol 589 ◽  
pp. 251-256
Author(s):  
István Mészáros
Keyword(s):  
Magnetic Measurements ◽  
Data Evaluation ◽  
Magnetic Contribution ◽  
Hyperbolic Model ◽  
Evaluation Technique ◽  
Magnetization Curves ◽  
Model Based ◽  
Non Destructive Evaluation ◽  
Lift Off ◽  
Non Destructive

In this paper a new data evaluation technique is presented for non-destructive magnetic measurements. This method is based on the multiphase hyperbolic model of magnetization and it is called model based data evaluation (MBDE) technique. The MBDE method allows us to separate the magnetic contribution of the magnetizing yoke from the measured magnetization curves. Therefore the determined magnetic properties of the tested sample are independent of the parameters of the applied magnetic yoke and the lift-off. The proposed method could become a useful tool in magnetic non-destructive evaluation (NDE).

Magnetic Detection of Creep Deterioration

2010 ◽  
Vol 659 ◽  
pp. 325-330
Author(s):  
István Mészáros
Keyword(s):  
Ferritic Steel ◽  
Power Plants ◽  
Base Material ◽  
Creep Damage ◽  
Data Evaluation ◽  
Hyperbolic Model ◽  
Evaluation Technique ◽  
Engineering Structures ◽  
Long Time ◽  
Property Changes

In this work a new magnetometer setup and a novel model based data evaluation technique was used to determine the creep damage in ferritic power plant steel. The tested material was 1Cr-0.5Mo-0.25V ferritic steel which is commonly used as pipeline base material of steam generators in power plants. It is commonly accepted that a combined form of fatigue and the creep processes cause the deterioration of this structural parts due to long time elevated temperature service. Nowadays, there is increasing need for remaining lifetime estimation of these engineering structures. In this paper, the variation of magnetization curves of Cr-Mo-V ferritic steel due to creep measured and the relation between creep damage and the magnetic property changes is discussed. A new data evaluation technique is presented which is based on the hyperbolic model of magnetization. A magnetic descriptor was derived from the hyperbolic model which can be determined from the initial part of the normal magnetization curve. The introduced parameter and evaluation technique seems to be especially useful for magnetic nondestuctive remanent lifetime evaluation.

Évaluation technique, économique et environnementale de procédés de traitement complémentaire avancés pour l’élimination des micropolluants

2015 ◽  
pp. 67-83 ◽  
Author(s):  
S. Besnault ◽  
S. Martin-Ruel ◽  
S. Baig ◽  
B. Heiniger ◽  
M. Esperanza ◽  
...  
Keyword(s):  
Evaluation Technique

A mathematical approach to data evaluation with focus on prediction of minimal residual disease in pediatric ALL

2012 ◽  
Vol 224 (03) ◽  
Author(s):  
A Torge ◽  
M Zimmermann ◽  
A Möricke ◽  
R Köhler ◽  
A Schrauder ◽  
...  
Keyword(s):  
Minimal Residual Disease ◽  
Residual Disease ◽  
Data Evaluation ◽  
Mathematical Approach ◽  
Pediatric All ◽  
Minimal Residual

Effects of contact gap on nondestructive evaluation using magnetic measurement for ferromagnetic steel

2020 ◽  
Vol 64 (1-4) ◽  
pp. 969-975
Author(s):  
Hiroaki Kikuchi ◽  
Yuki Sato
Keyword(s):  
Magnetic Flux ◽  
Nondestructive Evaluation ◽  
Effective Permeability ◽  
Magnetic Circuit ◽  
Magnetic Measurement ◽  
Air Gap ◽  
Motive Force ◽  
Hysteresis Curve ◽  
Evaluation Technique ◽  
Ferromagnetic Steel

We investigated effects of contact gap on magnetic nondestructive evaluation technique using a magnetic single-yoke probe. Firstly, we evaluated hysteresis curves and impedance related to permeability of the material measured by a single-yoke probe, when an air gap length between the probe and specimens changes. The hysteresis curve gradually inclines to the axis of the magneto-motive force and magneto-motive force at which the magnetic flux is 0 decreases with increasing the gap length. The effective permeability also decreases with increasing the gap thickness. The incremental of gap thickness increases the reluctance inside the magnetic circuit composed of the yoke, specimen and gap, which results in the reduction of flux applying to specimen.

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