MWM eddy current sensors for monitoring of crack initiation and growth during fatigue tests and in service

Zilberstein, Vladimir; Schlicker, Darrell; Walrath, Karen; Weiß, Volker; Goldfine, Neil

doi:10.1016/s0142-1123(01)00154-2

Cited by 59 publications

(23 citation statements)

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“…Tohmyoh et al (2001) detected the fatigue crack initiation of a test piece with a surface slit during rotating bending tests using surface SH (shear-horizontal) waves. Papazian et al (2007) and Zilberstein et al (2001Zilberstein et al ( , 2003Zilberstein et al ( , 2005 performed many studies on the application of a meandering winding magnetometer array sensor, ultrasonic techniques and an electrochemical fatigue sensor for the detection of crack initiation for many different types of fatigue test pieces. In addition to the above-mentioned methods, since the ion-sputtered film is very thin, a very short crack can change the electric resistance of the ion-sputtered film; thus, the ion-sputtered film would be practical for detecting the instant of fatigue crack initiation during a fatigue test.…”

Section: Fatigue Crack Initiation Detection Methods Using Ion-sputterementioning

confidence: 99%

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

Deng¹,

Nakanishi²

2011

Advances in Ceramics - Characterization, Raw Materials, Processing, Properties, Degradation and Healing

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Section: Fatigue Crack Initiation Detection Methods Using Ion-sputterementioning

confidence: 99%

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

Deng¹,

Nakanishi²

2011

Advances in Ceramics - Characterization, Raw Materials, Processing, Properties, Degradation and Healing

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“…The meander Magnetic Winding Magnetometers (MWM TM ) created first in Massachusetts Institute of Technology (MIT, USA) and then elaborated by Jentek Sensors Inc., are flexible film eddy current sensors for investigation the properties of conductive materials SL [9][10][11]. The uniqueness of the new technology is also in the use of so-called grid diagrams, actually the type of tetra-parameter hodograph chart, enabling to invert the measured amplitude and phase of the electromagnetic impedance values in to electric conductivity and magnetic permeability (Figure 6).…”

Section: Magnetic Meander Magnetometersmentioning

confidence: 99%

New Trends in Non-Destructive Evaluation of Surface Hardened Layers and Coatings

Vengrinovich¹

2013

JSEMAT

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This article should not be considered as a full review of current methods for non-destructive testing of surface layers. Rather, it is a subjective in this area. However, the article provides some review of the challenges posed by the current state of surface layers treatment techniques on the area of Non-Destructive materials evaluation: enhancement of the sensitivity to the type of defects, increasing resolution to submicron values, the requirement to diagnose the surface layers with depth resolution of properties, diagnosis of multilayer multicomponent surface layers and coatings, treated with concentrated energy.

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“…To improve the EC NDT reliability some variants were developed and are currently available. Neil Goldfine et al [10] have developed a MWM ® probe which is able to detect some FSW defects and also 50 µm depth defects on aluminium specimens under fatigue. However, it should be emphasized that this last result were achieved mainly because the probe was permanently mounted on the specimen during the tests, and therefore the lift-off effect was eliminated.…”

Section: -Introductionmentioning

confidence: 99%

Innovative concept and application of EC probe for inspection of friction stir welds

Vilaça

Santos²,

Rosado

et al. 2014

IJMMP

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All rights reserved. No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright. Applications for the copyright holder's written permission to reproduce any part of this publication should be addressed to the publishers. PREFACEThe rapidly expanding role of Non-Destructive testing and evaluation (NDT & NDE) methods in manufacturing, power, construction, and maintenance industries, as well as in basic research and development, has generated a large demand for practitioners, engineers, and scientists with knowledge of the subject. The Non-Destructive testing of materials is becoming more and more important, during the production process prior to building the constituent parts in individual devices and machines. It is becoming even more important in service inspection where the state of the material is checked and further safe operation of the device or machine is confirmed. Demands that each part built in machine is manufactured in a qualitative manner require from each manufacturer removing bad or rejected parts prior to selling them to buyers or building them in a device or a machine. Therefore demands are set up that manufacturers develop proper Non-Destructive methods, in corresponding devices and also experts with adequately verified knowledge. Especially for the reasons, in automated production, there often come demands that workpieces, namely machine parts are tested in a very short time while the method must assure respective reliability and also repeatability. The proceedings comprise papers presented at the 12th Int. NDT Conference held in Portorož, Slovenia from 4 to 6 September 2013. The conference was organized by the Slovenian NDT Society and Faculty of Mechanical Engineering, University of Ljubljana. The excellent scientific standard of the presented works, the presence of experts from 23 countries all over the globe and the inspiring venue of the Slovenian Adriatic Coast contributed to the success of the conference. The proceedings contain nine keynote papers presented by distinguished experts from the field, who I am grateful to for sharing their experties with us. The Scientific Committee reviewed 82 papers out of which 74 were presented at oral sessions and 8 at poster sessions. The presented papers discussed ultrasonic testing, electromagnetic, acoustic emission, thermal and infrared techniques and radiographic techniques, NDT education and training and other methods. The three-day event provided a forum for scientists, engineers and practitioners as well as endusers to review the latest developments, identify particular needs and opportunities for further advances, exchange knowledge and experience with other well-known experts as well as outlined the milestones for further progress in NDT & NDE fields. We are grateful to...

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MWM eddy current sensors for monitoring of crack initiation and growth during fatigue tests and in service

Cited by 59 publications

References 0 publications

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

New Trends in Non-Destructive Evaluation of Surface Hardened Layers and Coatings

Innovative concept and application of EC probe for inspection of friction stir welds

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