TY - GEN A1 - Heckel, Thomas A1 - Perez Alonso, M. T1 - Is there a need for a new standard for determination of steel cleanliness using high frequency ultrasonic testing? N2 - Increased use of high performance steel (HPS) for demanding applications calls for non-destructive ultrasonic testing methods which is covered by standards like SEP 1927 (1) and ASTM E588 (2). Here, an adaption of standards like increasing sensitivity and resolution of ultrasonic testing may be needed in order to improve determination of steel cleanliness. Modern requirements on standardization in that field have been evaluated during the INCAFAT project “A novel approach for rating fatigue-initiating inclusions in highly demanding steel” which was funded by the European Commission. Main results of this research show that an adapted standard should be open to different type of specimen due to the diversity in application. This includes a wide range from bars, rings and plates as well as different inspection sensitivities. An adapted standard should be open to the definition of the volume to be investigated and open to be selected by the user. Furthermore, for enhanced resolution the frequency range should be extended to higher frequencies. The use of focal beam probes shall be mandatory and probes should be selected according to the geometry of the specimen. Therefore, calibration procedures have to be improved significantly to allow proper sizing of indications. Indication height shall be directly transferred into an equivalent disc shaped reflector taking distance amplitude curves as well as signal amplitude distribution and signal travel time into account. A new standard draft proposal taking all these requirements into account has been filed in the frame of the INCAFAT project and is now on discussion. T2 - ECNDT - European Conference on Non-Destructive Testing 2018 CY - Gothenburg, Sweden DA - 11.06.2018 KW - Cleaniliness purity grade ultrasound non-destructive volumetric measurement standard PY - 2018 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/47210 AN - OPUS4-47210 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany