TY - CHAP A1 - Rhode, Michael A1 - Münster, C. A1 - Mente, Tobias A1 - Böllinghaus, Thomas A2 - Somerday, B.P. A2 - Sofronis, P. T1 - Influence of experimental conditions and calculation method on hydrogen diffusion coefficient evaluation at elevated temperatures T2 - International Hydrogen Conference (IHC 2016): Materials Performance in Hydrogen Environments N2 - Literature provides a wide range of hydrogen diffusion coefficients for low alloyed steels used in power plants. In fact, experimental boundary conditions and calculation methods have influence on the determination of these coefficients. The diffusion and trapping behavior in creep-resistant steel 7CrMoVTiB10-10 has been studied. Based on experimental carrier gas hot extraction (CGHE) data, a numerical model has been developed to describe the hydrogen transport and respective hydrogen distribution at elevated temperatures. The numerical results suggest that common calculation methods for diffusion coefficients are limited for experimental data analysis. The sample preparation time before CGHE experiment influences the determined diffusion coefficients with the consequence that non-homogeneous hydrogen concentration profiles have to be considered in the simulations. PB - ASME CY - New York, USA KW - Temperature effect KW - Hydrogen diffusion KW - Creep-resistant steel KW - Hydrogen assisted cracking KW - Carrier gas hot extraction PY - 2017 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/42502 AN - OPUS4-42502 SN - 978-0-7918-6138-7 SP - 495 EP - 503 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany