TY - CONF A1 - Dabah, Eitan A1 - Kannengießer, Thomas A1 - Eliezer, D. A1 - Böllinghaus, Thomas T1 - Influence of hydrogen on the residual stresses in super martensitic stainless steel T2 - MECA SENS VI T2 - MECA SENS VI CY - Hamburg, Germany DA - 2011-09-07 PY - 2011 AN - OPUS4-24741 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Dabah, Eitan A1 - Kannengießer, Thomas A1 - Eliezer, D. A1 - Böllinghaus, Thomas T1 - Influence of hydrogen on the residual stresses in super martensitic stainless steel T2 - Sitzung des DVS Fachausschusses13 "Rapidtechnologien" T2 - Sitzung des DVS Fachausschusses13 "Rapidtechnologien" CY - Munich, Germany DA - 2011-10-18 PY - 2011 AN - OPUS4-24665 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dabah, Eitan A1 - Kannengießer, Thomas A1 - Eliezer, D. A1 - Böllinghaus, Thomas T1 - In situ analysis of hydrogen behaviour in stainless steels by high energy synchrotron radiation JF - Materials science and engineering A N2 - Hydrogen generally causes lattice distortions and phase transformations when introduced into a metal matrix. The present contribution provides a report of first in situ investigations of hydrogen effects on the lattice of the austenite and the martensite phase in a supermartensitic stainless steel using hard synchrotron radiation for respective energy dispersion diffraction measurements. Lattice distortions, such as the planar spacing expansion, have been monitored during the complete hydrogen effusion process over 24 h and are directly correlated to the dissolved hydrogen in the metal matrix. Among other results, it turned out that hydrogen at the introduced concentration level causes a reversible lattice expansion and after hydrogen effusion the lattice nearly regained its original dimensions. Hydrogen much more significantly affects the austenite phase with respect to lattice expansion than the martensite phase, but no phase transformations occur during the hydrogen desorption process. KW - Hydrogen diffusion KW - Solubility KW - Lattice distortions KW - Energy dispersive X-ray diffraction PY - 2011 DO - https://doi.org/10.1016/j.msea.2010.10.090 SN - 0921-5093 SN - 1873-4936 VL - 528 IS - 3 SP - 1608 EP - 1614 PB - Elsevier B.V. CY - Amsterdam AN - OPUS4-22849 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Böllinghaus, Thomas A1 - Mente, Tobias A1 - Dabah, Eitan ED - Kulkarni, D.V. ED - Samant, M. ED - Krishnan, S. ED - De, A. ED - Krishnan, J. ED - Patel, H. ED - Bhaduri, A.K. T1 - Trends in investigating hydrogen cracking and diffusion in steel welds T2 - IIW International conference on global trends in joining, cutting and surfacing technology (Proceedings) N2 - The present contribution highlights recent trends in investigating hydrogen diffusion and cracking in steel welds. For such studies, supermartensitic stainless steels (SMSS) have exemplarily been selected. These materials have been used for offshore and marine constructions for about two decades now. They present a versatility of improved properties such as high strength to thickness ratio, good weldability and good corrosion resistance. However, as shown by respective failure cases, SMSS welds might become prone to hydrogen assisted cracking and the degradation phenomena are more easily to investigate due to the nearly homogeneous martensitic microstructure than in other materials. Generally, it has to be distinguished between cracking that occurs during or shortly after fabrication welding, or during subsequent operation of SMSS components. In order to achieve crack avoidance during fabrication and service, conclusive test sequences have to be applied, ranging from field tests at real components and full scale tests investigating the materials behavior under real service conditions to basic and small scale tests, such as tensile and corrosion tests, oriented more towards a materials ranking. Considerable testing of SMSS welds has been carried out and the present paper particularly summarizes spotlights on 1:1 scale component testing of welded tubulars, slow strain rate testing and basic tests oriented to elucidate the hydrogen behavior and degradation in SMSS weld microstructures. Also, permeation tests, hydrogen dependent degradation of mechanical properties and thermal desorption spectroscopy are adressed. As a specific item, first results of lately conducted investigations for tracking hydrogen movement in such weld microstructures by using high energy synchrotron radiation are elucidated. T2 - IIW International conference on global trends in joining, cutting and surfacing technology CY - Chennai, India DA - 21.07.2011 PY - 2011 SN - 978-81-8487-152-4 SP - 49 EP - 55 PB - Narosa Publ. House AN - OPUS4-26114 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dabah, Eitan A1 - Kannengießer, Thomas A1 - Eliezer, D. A1 - Böllinghaus, Thomas T1 - In situ synchrotron X-ray radiation analysis of hydrogen behavior in stainless steel subjected to continuous heating JF - Journal of materials science N2 - Hydrogen generally causes lattice distortions and phase transformations when introduced into a metallic crystal lattice. For the investigations reported in this contribution, hydrogen thermal desorption analysis has been carried out to observe the influence of hydrogen desorption on the lattice of super martensitic stainless steel during continuous heating. The lattice expansion parameter and the phase transformations have been monitored during the thermal desorption process, and the influence of hydrogen on such characteristics has been evaluated. It was found that hydrogen has a significant influence on both the lattice parameter and on the thermal expansion. However, hydrogen has no influence on phase transformation during thermal desorption. The hydrogen's desorption behavior in this process was also observed and it turned out that hydrogen desorbs in two stages, i.e., firstly diffusible hydrogen and trapped hydrogen afterward. KW - Synchrotron radiation KW - In situ KW - Hydrogen PY - 2012 DO - https://doi.org/10.1007/s10853-012-6489-9 SN - 0022-2461 SN - 1573-4803 VL - 47 IS - 15 SP - 5879 EP - 5885 PB - Springer Science + Business Media B.V. CY - Norwell, Mass. AN - OPUS4-26179 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Dabah, Eitan A1 - Kannengießer, Thomas A1 - Böllinghaus, Thomas A1 - Eliezer, Dan T1 - The influence of hydrogen on thermal desorption properties in structure materials T2 - International Hydrogen Conference 2012 T2 - International Hydrogen Conference 2012 CY - Jackson, WY, USA DA - 2012-09-09 PY - 2012 AN - OPUS4-27542 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Dabah, Eitan A1 - Brauser, Stephan A1 - Kannengießer, Thomas A1 - Beyer, K. T1 - Hydrogen trapping and dissolution behavior dependent on microstructure of duplex steels T2 - International Hydrogen Conference 2012 T2 - International Hydrogen Conference 2012 CY - Jackson, WY, USA DA - 2012-09-09 PY - 2012 AN - OPUS4-27543 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Dabah, Eitan A1 - Kannengießer, Thomas A1 - Eliezer, Dan A1 - Böllinghaus, Thomas A1 - Ben-Gurion, S. T1 - In-Situ Examination of Hydrogen behavior in stainless steel by using energy dispersive diffraction synchrotron T2 - International Hydrogen Conference 2012 T2 - International Hydrogen Conference 2012 CY - Jackson, WY, USA DA - 2012-09-09 PY - 2012 AN - OPUS4-27545 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Dabah, Eitan A1 - Kromm, Arne A1 - Brauser, Stephan A1 - Kannengießer, Thomas T1 - High-energy synchrotron Diffraction study of a Transformation Induced Plasticity Steel During Tensile Deformation T2 - FA 13 Eigenspannungen Besprechungen T2 - FA 13 Eigenspannungen Besprechungen CY - Remscheid, Germany DA - 2012-06-05 PY - 2012 AN - OPUS4-26062 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kannengießer, Thomas A1 - Dabah, Eitan ED - Marquis, F. T1 - Energy dispersive synchrotron diffraction for in-situ analyses of hydrogen behavior in steels T2 - PRICM-8 - 8th Pacific rim international congress on advanced materials and processing N2 - The extent of hydrogen embrittlement phenomenon is dependent on the interaction of hydrogen with the material i.e. diffusion behavior, lattice distortions, phase transformations and residual stresses developments. For the better understanding of the hydrogen interaction with the metal, possibilities of performing in-situ observations of the mentioned factors has to be accomplished. The EDDI (Energy Dispersive Diffraction) beamline at the BESSY II facility in Berlin provides this possibility and was used in order to investigate the aspects of this phenomenon in in-situ scale. The energy dispersive method entails a synchrotron X-ray white beam with a wide energy range (20–120 keV) which allows a fixed position of the sample and the detector, and combined with the high photons flux it allows a very short measurement time for obtaining a full scale X-Ray Diffraction patterns. In this contribution, the successful usage of high energy X-rays, applied for the first time for hydrogen behavior observations, provided the ability for evaluating in-situ the hydrogen diffusion behavior and the hydrogen interaction with stresses fields in the material. Steel samples were charged with hydrogen and examined by Synchrotron radiation. Two different methods were used in this research; the first is diffusible hydrogen concentration evaluation extracted from the lattice distortions, i.e. changes of the lattice parameter. The second is calculation of the residual stresses present in the sample and the interaction of hydrogen with them, using the known sin2ψ method. T2 - PRICM-8 - 8th Pacific rim international congress on advanced materials and processing CY - Waikoloa, Hawaii, USA DA - 04.08.2013 KW - Hydrogen embrittlement KW - Energy dispersive diffraction KW - Hydrogen diffusion KW - Residual stresses PY - 2013 SP - 3481 EP - 3487 AN - OPUS4-28975 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -