TY - CONF A1 - Schulz-Forberg, Bernd A1 - Nitsche, Michael T1 - Informationsmanagement - Sicherheitstechnik in der BAM T2 - VCI-Umwelttag für den Mittelstand CY - Frankfurt am Main, Deutschland DA - 2002-09-04 PY - 2002 SP - 1 EP - 21 AN - OPUS4-1496 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schulz-Forberg, Bernd A1 - Nitsche, Michael T1 - Informationsmanagement - Beiträge der BAM N2 - Informationsmanagement - Beiträge der BAM - Die BAM - eine Bundesbehörde im Geschäftsbereich des Bundesministeriums für Wirtschaft und Arbeit (BMWA) - Gründe für ein Informationsmanagement - Vom partiellen Service zum Informationsnetzwerk - I - Umfrage mit dem VCI Mittelstansbeauftragten - Umfrageergebnisse - Welche Informationen zu Sicherheitsthemen benötigen Sie? - Umfrageergebnisse - Welche Art der Informationsbereitstellung halten Sie für sich für nützlich? - Umfrageergebnisse - kritische Anmerkungen - Vom partiellen Service zum Informationsnetzwerk - II - Vom partiellen Service zum Informationsnetzwerk - III - Vom partiellen Service zum Informationsnetzwerk - IV - Vom partiellen Service zum Informationsnetzwerk - V - Vom partiellen Service zum Informationsnetzwerk - VI - Vom partiellen Service zum Informationsnetzwerk - VII - Das Fachportal wendet sich an Mitarbeiterinnen und Mitarbeiter - Das Fachportal - bietet - Das Fachportal kann Unterstützung leisten - Das Fachportal wird ausgebaut T2 - 27. Sitzung des Gefahrgut-Verkehrs-Beirats, Bundesministerium für Verkehr, Bau- und Wohnungswesen CY - Bonn, Germany DA - 2004-10-15 PY - 2004 AN - OPUS4-4785 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rhode, Michael A1 - Richter, Tim A1 - Mente, Tobias A1 - Mayr, P. A1 - Nitsche, A. T1 - Thickness and microstructure effect on hydrogen diffusion in creep‑resistant 9% Cr P92 steel and P91 weld metal N2 - Martensitic 9% Cr steels like P91 and P92 show susceptibility to delayed hydrogen assisted cracking depending on their microstructure. In that connection, effective hydrogen diffusion coefficients are used to assess the possible time-delay. Limited data on room temperature diffusion coefficients reported in literature vary widely by several orders of magnitude (mostly attributed to variation in microstructure). Especially P91 weld metal diffusion coefficients are rare so far. For that reason, electrochemical permeation experiments had been conducted using P92 base metal and P91 weld metal (in as-welded and heat-treated condition) with different thicknesses. From the results obtained, diffusion coefficients were calculated using to different methods, time-lag, and inflection point. Results show that, despite microstructural effects, the sample thickness must be considered as it influences the calculated diffusion coefficients. Finally, the comparison of calculated and measured hydrogen concentrations (determined by carrier gas hot extraction) enables the identification of realistic diffusion coefficients. KW - Creep-resistant steel KW - Diffusion KW - Hydrogen assisted cracking KW - Welding KW - Electrochemical permeation PY - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-540645 SN - 0043-2288 SP - 1 EP - 16 PB - Springer Nature Switzerland AG AN - OPUS4-54064 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rhode, Michael A1 - Richter, Tim A1 - Mayr, P. A1 - Nitsche, A. A1 - Mente, Tobias A1 - Böllinghaus, Thomas T1 - Hydrogen diffusion in creep-resistant 9% Cr P91 multi-layer weld metal N2 - Welded components of P91 9% Cr steel demand for careful welding fabrication with necessary post weld heat treatment (PWHT). Before the PWHT, a hydrogen removal heat treatment is necessary for avoidance of hydrogen assisted cracking (HAC). In this context, the microstructure and temperature-dependent hydrogen diffusion is important, and reliable diffusion coefficients of P91 weld metal are rare. For that reason, the diffusion behavior of P91 multi-layer weld metal was investigated for as-welded (AW) and PWHT condition by electrochemical permeation experiments at room temperature and carrier gas hot extraction (CGHE) from 100 to 400 °C. Hydrogen diffusion coefficients were calculated, and the corresponding hydrogen concentration was measured. It was ascertained that both heat treatment conditions show significant differences. At room temperature the AW condition showed significant hydrogen trapping expressed by to seven times lower diffusion coefficients. A preferred diffusion direction was found in perpendicular direction expressed by high permeability. The CGHE experiments revealed lower diffusion coefficients for the AW condition up to 400 °C. In this context, a hydrogen concentration of approximately 21 ml/100 g was still trapped at 100 °C. For that reason, a certain HAC susceptibility of as-welded P91 weld metal cannot be excluded, and hydrogen removal should be done before PWHT. KW - Creep resisting materials KW - Diffusion KW - Hydrogen KW - Weld metal KW - Post weld heat treatment KW - Microstructure PY - 2020 U6 - https://doi.org/10.1007/s40194-019-00828-8 SN - 0043-2288 VL - 64 IS - 2 SP - 267 EP - 281 PB - Springer AN - OPUS4-50471 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rhode, Michael A1 - Nietzke, Jonathan A1 - Richter, Tim A1 - Mente, Tobias A1 - Mayr, P A1 - Nitsche, A T1 - Hydrogen effect on mechanical properties and cracking of creep‑resistant 9% Cr P92 steel and P91 weld metal N2 - Martensitic 9% Cr steels like P91 and P92 can show an increased susceptibility to delayed hydrogen-assisted cracking. The focus of this study was the microstructure and heat treatment efect on the mechanical properties of P92 base material and P91 multi-layer weld metal in both as-welded and post weld heat treated (PWHT) condition. Tensile tests with hydrogen free reference samples and electrochemically hydrogen charged samples were carried out; the mechanical properties were assessed and supported by detailed fractographic analysis. Finally, a hydrogen and microstructure-dependent fracture criterion is established. All investigated microstructures showed a hydrogen-infuenced degradation of the mechanical properties compared to the hydrogen-free reference samples. The as-welded martensitic P91 weld metal had the highest degree of degradation in the presence of hydrogen. The P91 PWHT weld metal and the P92 base material had comparable properties. From that point of view, a signifcantly increased risk for hydrogen-assisted cold cracking during welding fabrication of P91 weld joints must be considered before any heat treatment is conducted. T2 - IIW Annual Assembly, Meeting of Commission IX-C CY - Tokyo, Japan DA - 16.07.2022 KW - Creep-resisting materials KW - Welding KW - Hydrogen assisted cracking KW - Hydrogen embrittlement KW - Mechanical properties PY - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-564070 SN - 0043-2288 SP - 1 EP - 12 PB - Springer Nature CY - Basel (CH) AN - OPUS4-56407 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Nitsche, Michael A1 - Jacobasch, Stefan T1 - Forschen und Entwickeln - Beraten, Prüfen und Zulassen - Die BAM - Bundesanstalt für Materialforschung und -prüfung KW - Technische Sicherheit KW - Gefahrguttransport KW - Gefahrstoffe KW - Gefahrgüter KW - Aufgaben der BAM PY - 2005 SN - 0941-6080 IS - 1 SP - 14 EP - 18 PB - Verl. TÜV Rheinland CY - Köln AN - OPUS4-10533 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Nitsche, Michael T1 - Neues Internet-Fachportal KW - Internet-Fachportal KW - Öffentlich-technische Sicherheit PY - 2004 SN - 1434-9728 SN - 1436-4948 SN - 0372-2457 SN - 0376-1185 VL - 45 IS - 3 SP - 6 PB - Springer-VDI-Verl. CY - Düsseldorf AN - OPUS4-10532 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nitsche, Michael A1 - Schulz-Forberg, Bernd T1 - Technische Entwicklungen im Gefahrgutrecht - Wohin geht der Weg in der Gefahrgutbeförderung? T2 - 1. Deutsche Gefahrgut-Sicherheitstage, Nürburgring CY - Nürburg, Germany DA - 2005-09-06 PY - 2005 AN - OPUS4-10869 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nitsche, Michael T1 - Gewährleistung eines hohen Sicherheitsniveaus beim New & Global Approach T2 - 42. Sitzung des Deutschen Akkreditierungsrates, Sept. 2005 CY - Frankfurt am Main, Germany DA - 2005-09-07 PY - 2005 AN - OPUS4-10870 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nitsche, Michael T1 - Qulity assurance programmes for the manufacturing of Packagings, IBCs and Large Packagings T2 - ISO - Central Secretariat Geneva CY - Geneva, Switzerland DA - 2003-07-04 PY - 2003 AN - OPUS4-5247 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -