TY - CONF A1 - Erhard, Anton T1 - Fehlercharakterisierung in Bauteilen mit Hilfe der zerstörungsfreien Prüfung T2 - FORMAT Hochschulpraktikum Schadenanalyse "Systemtechnik zur Aufklärung von Versagensabläufen" CY - Munich, Germany DA - 2007-03-13 PY - 2007 AN - OPUS4-14585 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton T1 - Modelling of reflectivity patterns from artificial defects T2 - ASNT Research Symposium CY - Orlando, FL, USA DA - 2007-03-29 PY - 2007 AN - OPUS4-14689 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton T1 - Fehlercharakterisierung in Bauteilen mit Hilfe der zerstörungsfreien Prüfung T2 - FORMAT Hochschulpraktikum Schadenanalyse CY - München, Deutschland DA - 2007-03-12 PY - 2007 SP - 1 EP - 32(?) PB - Bayerischer Forschungsverbund Materialwissenschaften CY - München AN - OPUS4-14621 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton T1 - Putting Physics to work for Nuclear Safety PY - 2007 SN - 1634-7676 IS - 10 SP - 20 EP - 21 PB - Euro Rscg C&O. CY - Paris AN - OPUS4-14752 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton T1 - Grundsätze der zerstörungsfreien Prüfung T2 - KTA-Seminar CY - Cologne, Germany DA - 2007-06-12 PY - 2007 AN - OPUS4-14855 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bovtun, Viktor Petrovic A1 - Döring, Joachim A1 - Bartusch, Jürgen A1 - Beck, Uwe A1 - Erhard, Anton A1 - Yakymenko, Y. T1 - Ferroelectret non-contact ultrasonic transducers N2 - Dielectric and electromechanical properties of the cellular polypropylene ferroelectret films (EMFIT), combining strong piezoelectric response with a low density and softness, evidence their high potential for the air-coupled ultrasonic applications. The disadvantage of the low coupling factor is compensated by the extremely low acoustic impedance, which provides excellent matching to air and promises efficient sound transmission through the air–transducer interface. The influence of the electrodes on the electromechanical properties was investigated. Electron beam evaporation technology was adapted to the EMFIT films, and films with both-sided Au and Al electrodes were prepared without reducing or suppressing of the electromechanical properties. Finally, prototype transducers based on the EMFIT films were developed. In spite of the simple construction and absence of matching layers, high sensitivity of the EMFIT transducers was proved in the air-coupled ultrasonic experiment. Amplitude and delay time scanned images of the polyethylene step wedge with holes, obtained in both pulse-echo and transmission modes, demonstrate that non-contact ultrasonic imaging and testing with EMFIT transducers is possible. KW - Piezoelectric film KW - Air borne transducer KW - Non-destructive testing PY - 2007 SN - 0947-8396 VL - 88 IS - 4 SP - 737 EP - 743 PB - Springer CY - Berlin AN - OPUS4-15074 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bovtun, V. A1 - Döring, Joachim A1 - Bartusch, Jürgen A1 - Beck, Uwe A1 - Erhard, Anton A1 - Yakymenko, Y. T1 - Air-coupled ultrasonic transducers based on cellular polypropylene ferroelectret films N2 - Analysis of the dielectric and electromechanical properties of the cellular polypropylene ferroelectret films (EMFIT) evidences their high potential for the application in the air-coupled ultrasonic transducers. Simple prototype transducers, based on the EMFIT films, were developed and their high sensitivity was proved in the air-coupled ultrasonic experiment. Amplitude and delay time scanned images of the polyethylene step wedge with holes, obtained in both pulse-echo and transmission modes, demonstrate that non-contact ultrasonic imaging with EMFIT transducers is possible. KW - Air-coupled ultrasonics KW - Non-contact transducers KW - Ferroelectrets KW - Electromechanical properties PY - 2007 SN - 0015-0193 SN - 1563-5112 VL - 353 IS - 1 SP - 186 EP - 192 PB - Taylor & Francis CY - New York, NY AN - OPUS4-14977 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Csapo, G. A1 - Just, Tilman ED - Bièth, M. ED - Whittle, J. T1 - Qualification of NDT techniques for in-service inspections in nuclear power plants in accordance with ENIQ - Examples and lessons learned T2 - 5th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurised Components CY - San Diego, CA, USA DA - 2006-05-10 PY - 2007 SN - 978-92-79-06107-3 SN - 1018-5593 N1 - Serientitel: JRC Scientific and Technical Reports – Series title: JRC Scientific and Technical Reports IS - Paper 1005 SP - 153 EP - 162 PB - Office for Official Publications of the European Communities CY - Luxembourg AN - OPUS4-15995 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton T1 - Long term interim storage facility for nuclear reactor compartments of submarines - German support for utilization of nuclear submarines in Russia T2 - 15th International Symposium on Packaging and Transportation of Radioactive Materials (PATRAM) CY - Miami, FL, USA DA - 2007-10-21 PY - 2007 AN - OPUS4-16066 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Munikoti, Vijayendra K. A1 - Brekow, Gerhard A1 - Tessaro, Ute ED - Bièth, M. ED - Whittle, J. T1 - Improved Dissimilar Weld Inspection for Transverse Discontinuities T2 - 5th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurised Components CY - San Diego, CA, USA DA - 2006-05-10 KW - Ultraschallprüfung von Mischnähten KW - Gruppenstrahlertechnik KW - Mischnähte KW - Ultraschallprüfung PY - 2007 SN - 978-92-79-06107-3 SN - 1018-5593 N1 - Serientitel: JRC Scientific and Technical Reports – Series title: JRC Scientific and Technical Reports IS - Paper 1005 SP - 1 EP - 8 PB - Office for Official Publications of the European Communities CY - Luxembourg AN - OPUS4-16048 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton T1 - Aufgaben und Abgrenzung der zerstörungsfreien Prüfung T2 - DGZfP Jahrestagung CY - Fürth, Germany DA - 2007-05-14 PY - 2007 AN - OPUS4-16072 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -