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603 views Technical Discussions gulay litchfield gulay litchfield 06:32 Jul-22-2003 Crack detection Dear All We are producing punches and dies for the tabletting machines (presses) in the pharmaceutical industry. Currently, we have been sourcing a crack detection equipment (for very fine cracks) for surface and sub-surface cracks.Eventhough we have liquid penetrant and optical measurement equipment in place, these methods are time consuming eventhough very effective. The ideal method should detect the cracks within less than a minute. Our products are made of steel and average material thickness is 16 mm. If you suggest any method or equipment which allows us perform the test in less than a minute and also precise, this would be highly appreciated. Meanwhile, we tried Eddy current method and this did not give the expectant results, was not effective. For more information about our products, you can visit our web site. www.iholland.co.uk Could Magnetic Particle-Fluorescent, Ultrasonic test or Magnetic Barkhausen Noise method be the answer? Thank you in advance                  Reply  Translate  Close   John O'Brien Consultant, - Chevron ETC , USA, Joined Jan 2000, 278 John O'Brien Consultant, - Chevron ETC , USA, Joined Jan 2000 278 09:56 Jul-24-2003 Re: Crack detection You might consider resistivity measurement. 4 point pin resisitivity measures very fine chganges in measurement resistance over a set pin spacing. Changes in resisitivity due to prescence of a crack are possible. Once set up properly it is less than a minute per spot. If you wish to pursue please contact me.                  Reply  Translate  Close   Jamie Gauthier Jamie Gauthier 06:07 Jul-24-2003 Re: Crack detection You might consider ACFM (Alternating Current Field Measurement). Very accurate and fast for measuring surface breaking cracks. Can work in high temperatures as well and gives a recordable image.                  Reply  Translate  Close   abdallah hassan abdallah hassan 05:35 Aug-04-2003 Re: Crack detection : You might consider resistivity measurement. 4 point pin resisitivity measures very fine chganges in measurement resistance over a set pin spacing. Changes in resisitivity due to prescence of a crack are possible. Once set up properly it is less than a minute per spot. If you wish to pursue please contact me. .plz reply quickly either refuse or accept                  Reply  Translate  Close   Product Spotlight Ceram 35P (Panoramic) StandBALTEAU NDT The Ceram 35P is the panoramic brand new portable generators designed by Balteau NDT and is offeri ... ng no less than 300kV, 5mA and 100% duty cycle for an incredible image contrast even at full power. It will will surely become a reference as it can be classified as a high power portable unit and can be operated with our CF2000 control unit but also with our well known Hand-X Wireless Remote Control. > 5 Showcases3 Videos NEW! The PragmaPro Instrument Platform StandPRAGMA The PragmaPro is based on a modular cartridge technology and supports various NDT instrument modal ... ities such as UT, PAUT, ECT and many more. This new platform is based on a machined, powder-coated aluminum frame for shock-proofness, best sealing qualities and maximum heat dissipation. This is practical to extend the outdoor temperature range and/or to extend the power injected in the transducers. The PragmaPro is aiming at a very wide range of applications, such as weld scanning, corrosion mapping and composite testing. > 5 Showcases 35 years of VOGT Ultrasonics! StandVOGT Ultrasonics GmbH This year we are celebrating a company anniversary! 35 years have passed since we first took our t ... est device and swung the probe on behalf of safety. But our ultrasonic know-how goes back many years.. > 3 Showcases NDT Master Lecturer StandNDT Master In the program both university professors and practitioners will give lectures, which guarantees the ... oretical depth and practical inside. Academic Director: Prof. Dr. Christian Boller The following lecturers are not complete: Prof. Tadeusz Stepinski, Prof. Wieslaw Staszewski, Prof. Frank Walther, Prof. Giovanni Bruno, Prof. Gerd Dobmann, Prof. Philippe Guy > more Showcases Share... Home Exhibition Archive Forum Jobs MyNDT Network Events Directory NDT A-Z Advertise Privacy Policy Contact About © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info Accept top this is debug window s