The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

A Klimpel - One of the best experts on this subject based on the ideXlab platform.

David Cameron Wright - One of the best experts on this subject based on the ideXlab platform.

  • Vibro-enhanced fluorescent Penetrant Inspection (FPI)
    Insight, 2009
    Co-Authors: K. Milne, A. Dunhill, Peter Cawley, David Cameron Wright
    Abstract:

    The potential of vibration as a means of encouraging liquid Penetrant to fill and bleed out of cracks, by changing the crack mouth opening or the surface energy of the liquid-solid interface, was investigated. An image-processing algorithm was used to automatically detect crack indications. Tests were carried out with both static and dynamic loading; the change in crack mouth opening with static load was measured optically. The probability of detection of the Penetrant process was observed to increase if the crack was loaded either statically or dynamically. The cross-crack strain required to observe an improvement was the same for static and dynamic loading (>500 μe). Therefore, there is no advantage in loading the crack with this mode of vibration. Also, the dynamic strains approached the fatigue threshold for crack propagation and so would be unacceptable from a structural integrity point of view.

  • VIBRO‐ENHANCED FLUORESCENT Penetrant Inspection (FPI)
    AIP Conference Proceedings, 2008
    Co-Authors: K. Milne, A. Dunhill, Peter Cawley, David Cameron Wright
    Abstract:

    The potential of vibration as a means of encouraging liquid Penetrant to fill and bleed‐out of cracks, by changing the crack closure or the surface energy of the liquid‐solid interface, was investigated. An image‐processing algorithm was used to automatically detect crack indications. The change in crack mouth opening with static load was measured optically. An improvement was observed if the crack was loaded either statically or dynamically to cross‐crack strains greater than 500 μe.

  • vibro enhanced fluorescent Penetrant Inspection fpi
    REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2008
    Co-Authors: K. Milne, A. Dunhill, Peter Cawley, David Cameron Wright
    Abstract:

    The potential of vibration as a means of encouraging liquid Penetrant to fill and bleed‐out of cracks, by changing the crack closure or the surface energy of the liquid‐solid interface, was investigated. An image‐processing algorithm was used to automatically detect crack indications. The change in crack mouth opening with static load was measured optically. An improvement was observed if the crack was loaded either statically or dynamically to cross‐crack strains greater than 500 μe.

K. Milne - One of the best experts on this subject based on the ideXlab platform.

  • Vibro-enhanced fluorescent Penetrant Inspection (FPI)
    Insight, 2009
    Co-Authors: K. Milne, A. Dunhill, Peter Cawley, David Cameron Wright
    Abstract:

    The potential of vibration as a means of encouraging liquid Penetrant to fill and bleed out of cracks, by changing the crack mouth opening or the surface energy of the liquid-solid interface, was investigated. An image-processing algorithm was used to automatically detect crack indications. Tests were carried out with both static and dynamic loading; the change in crack mouth opening with static load was measured optically. The probability of detection of the Penetrant process was observed to increase if the crack was loaded either statically or dynamically. The cross-crack strain required to observe an improvement was the same for static and dynamic loading (>500 μe). Therefore, there is no advantage in loading the crack with this mode of vibration. Also, the dynamic strains approached the fatigue threshold for crack propagation and so would be unacceptable from a structural integrity point of view.

  • VIBRO‐ENHANCED FLUORESCENT Penetrant Inspection (FPI)
    AIP Conference Proceedings, 2008
    Co-Authors: K. Milne, A. Dunhill, Peter Cawley, David Cameron Wright
    Abstract:

    The potential of vibration as a means of encouraging liquid Penetrant to fill and bleed‐out of cracks, by changing the crack closure or the surface energy of the liquid‐solid interface, was investigated. An image‐processing algorithm was used to automatically detect crack indications. The change in crack mouth opening with static load was measured optically. An improvement was observed if the crack was loaded either statically or dynamically to cross‐crack strains greater than 500 μe.

  • vibro enhanced fluorescent Penetrant Inspection fpi
    REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2008
    Co-Authors: K. Milne, A. Dunhill, Peter Cawley, David Cameron Wright
    Abstract:

    The potential of vibration as a means of encouraging liquid Penetrant to fill and bleed‐out of cracks, by changing the crack closure or the surface energy of the liquid‐solid interface, was investigated. An image‐processing algorithm was used to automatically detect crack indications. The change in crack mouth opening with static load was measured optically. An improvement was observed if the crack was loaded either statically or dynamically to cross‐crack strains greater than 500 μe.

L. J. H. Brasche - One of the best experts on this subject based on the ideXlab platform.

  • FLUORESCENT Penetrant Inspection—CLEANING STUDY UPDATE
    AIP Conference Proceedings, 2009
    Co-Authors: David J. Eisenmann, L. J. H. Brasche
    Abstract:

    Fluorescent Penetrant Inspection (FPI) is widely used in the aviation industry and other industries for surface‐breaking crack detection. As with all Inspection methods, adherence to the process parameters is critical to the successful detection of defects. There is variety of lubricants and surface coatings used in the aviation industry which must be removed prior to FPI. Before the FPI process begins, components are cleaned using a variety of cleaning methods which are selected based on the alloy and the soil types which must be removed. It is also important that the cleaning process not adversely affect the FPI process. From the first three phases of this project it has been found that a hot water rinse can aid in the detection process when using this nondestructive method.

  • fluorescent Penetrant Inspection cleaning study update
    REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Proceedings of the#N#35th Annual Review of Progress in Quantitative Nondestructive Evalu, 2009
    Co-Authors: David J. Eisenmann, L. J. H. Brasche
    Abstract:

    Fluorescent Penetrant Inspection (FPI) is widely used in the aviation industry and other industries for surface‐breaking crack detection. As with all Inspection methods, adherence to the process parameters is critical to the successful detection of defects. There is variety of lubricants and surface coatings used in the aviation industry which must be removed prior to FPI. Before the FPI process begins, components are cleaned using a variety of cleaning methods which are selected based on the alloy and the soil types which must be removed. It is also important that the cleaning process not adversely affect the FPI process. From the first three phases of this project it has been found that a hot water rinse can aid in the detection process when using this nondestructive method.

  • Engineering studies for fluorescent Penetrant Inspection with a focus on developer application methods
    Insight, 2009
    Co-Authors: L. J. H. Brasche, David J. Eisenmann, R. Lopez, Keith Griffiths
    Abstract:

    Fluorescent Penetrant Inspection (FPI) is the most widely used global Inspection method, playing a particularly important role in aviation. Given the contribution that reliable implementation of the FPI process can make to flight safety, the US Federal Aviation Administration (FAA) has funded a programme to assess the FPI parameters and their role in effective detection of typical flaws. Iowa State University's Center for NDE (CNDE) has led a team that includes many industry partners from the aviation industry during this six-year programme. The industry partners have provided guidance and prioritisation input, and in many cases access to internal data, samples or use of facilities to support the programme. The focus of the programme has been on quantitative assessment of FPI performance using a combination of data gathering methods, which has included indication luminance as measured using a photometer, UV-A indication appearance using a fluorescence stereomicroscope, and in some cases the more traditional probability of detection (POD) study. Numerous studies have been completed, although results of developer studies will be the focus of this paper. Choice of indication development parameters starts with the selection of the developer form. All four forms have been evaluated during this programme: dry powder, water-soluble, water-suspendible, and nonaqueous wet developers. The results of the developer studies are presented below along with key 'lessons learned'.

  • Characterization of Developer Application Methods Used in Fluorescent Penetrant Inspection
    Quantitative Nondestructive Evaluation, 2006
    Co-Authors: L. J. H. Brasche, R. Lopez, D. Eisenmann
    Abstract:

    Fluorescent Penetrant Inspection (FPI) is the most widely used Inspection method for aviation components seeing use for production as well as an inservice Inspection applications. FPI is a multiple step process requiring attention to the process parameters for each step in order to enable a successful Inspection. A multiyear program is underway to evaluate the most important factors affecting the performance of FPI, to determine whether existing industry specifications adequately address control of the process parameters, and to provide the needed engineering data to the public domain. The final step prior to the Inspection is the application of developer with typical aviation Inspections involving the use of dry powder (form d) usually applied using either a pressure wand or dust storm chamber. Results from several typical dust storm chambers and wand applications have shown less than optimal performance. Measurements of indication brightness and recording of the UVA image, and in some cases, formal prob...

B. Maccracken - One of the best experts on this subject based on the ideXlab platform.

  • Automated fluorescent Penetrant Inspection (FPI) system is triple A
    SAE Technical Paper Series, 1998
    Co-Authors: T.l. Adair, D.h. Wehener, M.g. Kindrew, H.i. Winter, B. Maccracken
    Abstract:

    This paper describes how Fluorescent Penetrant Inspection (FPI) was used in the past, how it is used now and how it will be used in the future. The United States Air Force (USAF) and Pratt & Whitney (P&W) now use a fully-automated FPI process with manual visual Inspection. With direction and funding provided by the USAF/Aeronautical System Center (ASC), these fully-automated FPI processors, located at Kelly Air Force Base in San Antonio, Texas were developed, manufactured, installed qualified and put into operation by Pratt & Whitney. This paper will cover the following: the Qualification and Acceptance Tests which include test objectives, test articles, test facility, test equipment, test results, and training. This technology is affordable (lower processing cost resulting from increased throughput reduced maintenance man-hours and reduced material consumption), adaptable (multiple industry applications, flexible layout accommodates simple, complex, large and small geometries), and accurate (improved reliability and detection capability through consistent processing). In addition, the FPI system is environmentally clean. P&W can design, manufacture, and install a customized FPI system for its customers. P&W is continually improving today's technologies and techniques to assure global readiness for the 21st century.

  • Wet soluble developers: the negative view
    Materials evaluation, 1993
    Co-Authors: B. Maccracken
    Abstract:

    Of the four different types of developers currently being used throughout the Penetrant industry, the wet soluble developer is one that requires more controls, more care in handling of parts, and more monitoring of the solution, than dry or nonaqueous developers do. This article is written to inform and yet caution the industry on the proper controls and monitoring techniques necessary when a wet soluble developer is chosen for a Penetrant Inspection system. It will also explain the various problems that can be associated with the use of wet soluble developers, and why proper application of the developer, including the manipulation of parts, is so extremely important. The intent is not to negate the use of wet soluble developers, but the stress the importance of when, why, and how wet soluble developers must be employed and controlled in order to obtain a quality Penetrant Inspection system.