TY - CONF A1 - Schaumann, P. A1 - Schürmann, K. A1 - Pittner, Andreas A1 - Rethmeier, Michael T1 - Automatically Welded Tubular X-Joints - Welding Procedure and Prediction of the Technical Fatigue Crack Location N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Therefore, this paper ad-dresses the welding process of automated manufactured tubular X-joints. Additionally, fatigue tests of the automatically welded tubular joints are presented focusing on the location of the technical fatigue crack. The detected location of the technical crack is compared to numerical investigations predicting the most fatigue prone notch con-sidering the structural stress approach as well as the notch stress ap-proach. T2 - 29th International Ocean and Polar Engineering Conference CY - Honolulu, Hawaii, USA DA - 16.06.2019 KW - Notch stress approach KW - Tubular X-joints KW - Automated manufacturing KW - Fatigue tests KW - Structural stress approach PY - 2019 SN - 978-1-880653-85-2 SP - 4098 EP - 4105 AN - OPUS4-51848 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gottlieb, Cassian A1 - Günther, Tobias A1 - Wilsch, Gerd A1 - Bohling, Christian T1 - Chemometrics for the analysis of cement-based materials N2 - The analysis of the chemical composition of cement-based materials like concrete is a crucial task in civil engineering. Concrete is a multi-phase material made of cement, water, aggregates, additives and admixtures. During the damage assessment of concrete structures, the external ingress of harmful species like chlorine, alkalis or sulfates needs to be determined. In order to provide a fast and precise analysis of concrete the application of LIBS offers unique possibilities as the technique can detect all elements at air atmosphere. To determine the condition of concrete, the information about the chemical composition, the ingress of harmful species as well as the evaluation of characteristic values like the used cement type or the type of aggregates are needed. This work presents the two-dimensional evaluation of concrete samples using LIBS and multivariate data analysis of atomic and molecular emission. For the evaluation of the main components different classification methods will be applied to identify the heterogeneity of the samples. With respect to their specific phase, different species will be quantified using multivariate regression (PLS) and important figures of merit will be presented. All results will be verified using Standard procedure of wet chemistry (XRF, potentiometric titration and ICP-OES). T2 - 10th Euro-Mediterranean Symposium CY - Brno, Czech Republic DA - 08.09.2019 KW - Heterogeneous material KW - Chemometics KW - Cement KW - Concrete PY - 2019 AN - OPUS4-51838 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kömmling, Anja A1 - Simbruner, Kai A1 - Grelle, Tobias A1 - Jaunich, Matthias A1 - Zencker, Uwe A1 - Wolff, Dietmar A1 - Orellana Pérez, Teresa A1 - Völzke, Holger T1 - Research at BAM for evaluating long term safety of container systems and components N2 - Safety of long term containment and storage of radioactive waste is an essential issue, which is increasingly gaining international attention. Extending interim storage beyond initial license periods is one of the major challenges worldwide. BAM has been involved in all kinds of radioactive waste container safety evaluation for storage and transportation including their long term performance from the very beginning. Today, all work related to the safe management of radioactive waste is linked by the activity field “Nuclear Waste Management” within the Focus Area “Energy” at BAM and in conjunction with a research strategy and agenda. Most recently, the working group “Long Term Safety of Container Systems and Components” was established to launch and perform research projects related to safety issues concerning the extended interim storage of radioactive waste. For example, within our project LaMEP, we investigate ageing effects of metal and elastomer seals as well as polymeric neutron shielding materials, which are container components that fulfil major safety functions. The results of the experiments help to understand the long term behaviour of these components. Likewise, our project BRUZL started at BAM in 2018 with the aim of developing a fracture mechanics approach to understand and describe a potential brittle failure mechanism of fuel cladding during long-term interim storage. BAM also contributes to the GRS project “Development of methods and models and international exchange for safety evaluation in the frame of interim storage of radioactive waste”. Additionally, BAM is involved in several international research programmes dealing with extended interim storage, such as the European Joint Programme on Radioactive Waste Management (EURAD), the Extended Storage Collaboration Program (ESCP) and IAEA Coordinated Research Projects. The present contribution provides a comprehensive overview of BAM research activities contributing to national and international gap analyses and to filling knowledge gaps regarding the safe long term management of radioactive waste. T2 - Annual Meeting on Nuclear Technology 2019 CY - Berlin, Germany DA - 07.05.2019 KW - Radioactive Waste KW - Long-term safety PY - 2019 SN - 978-3-926956-95-8 SP - 1 EP - 5 AN - OPUS4-51486 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Günther, Tobias A1 - Völker, Tobias T1 - Mobile LIBS system for evaluation of concrete structures on site N2 - Features and application of a mobile LIBS system for evaluation of concrete structures on-site. T2 - EMSLIBS 2019 CY - Brno, Czech Republic DA - 08.09.2019 KW - On-site KW - LIBS KW - Concrete KW - Mapping KW - Evaluation PY - 2019 AN - OPUS4-51711 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Günther, Tobias A1 - Völker, Tobias T1 - LIBS for the analysis of concrete N2 - Special features and examples of using LIBS on concrete. T2 - Workshop on tandem LIBS/LA-ICP-MS CY - Berlin, Germany DA - 18.11.2019 KW - Mobile system KW - LIBS KW - Concrete KW - Damage KW - Chloride KW - Sulphate KW - Mapping PY - 2019 AN - OPUS4-51710 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Günther, Tobias A1 - Millar, Steven A1 - Völker, Tobias T1 - Mobile LIBS-System for condition assesment of concrete structures on-site N2 - Application of a mobile LIBS system for on-site investigation of chemical composition of concrete. T2 - SMAR 2019 CY - Potsdam, Germany DA - 27.08.2019 KW - Mobile system KW - LIBS KW - Concrete KW - Damage KW - Chloride KW - Sulphate KW - Mapping PY - 2019 AN - OPUS4-51706 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Günther, Tobias A1 - Völker, Tobias T1 - Fast quantitave chemical analysis of concrete using LIBS N2 - Overview of application of LIBS for the fast and automated quantitative chemical analysis of concrete. T2 - NDT-E Workshop CY - Berlin, Germany DA - 12.06.2019 KW - Sulphate KW - LIBS KW - Concrete KW - Damage KW - Chloride KW - Mapping PY - 2019 AN - OPUS4-51704 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Gottlieb, Cassian A1 - Günther, Tobias A1 - Millar, Steven A1 - Völker, Tobias T1 - Laser-Induced Breakdown Spectroscopy (LIBS) Automated 2D chemical analysis of chloride content in concrete structures N2 - The application of a LIBS system is presented. A diode-pumped low energy laser (3 mJ, 1.5 ns, 100 Hz) and a compact NIR spectrometer are used. A scanner allows the two-dimensional element mapping. For the quantitative analysis calibration of the system is carried out with reference samples in a concentration range of chlorine of 0.05 wt.% to 2.5 wt.%. To determine the 2D distribution of harmful elements (Cl, C), concrete cores were drilled, split and analyzed directly. By comparing the chloride ingress and the carbonation, the interaction of both processes can be visualized in one measurement that takes less than 10 minutes with a drill core of 50 mm x 100 mm. Results obtained were compared and verified with standard measurements. T2 - Concrete Solutions 2019 CY - Cluj Napoca, Romania DA - 30.09.2019 KW - Chloride KW - Beton KW - LIBS KW - Schädigung PY - 2019 AN - OPUS4-51703 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Günther, Tobias A1 - Völker, Tobias T1 - LIBS – Betonanalytik mit dem Laser N2 - Es wird ein alternatives Verfahren zur schnellen zweidimensionalen Analyse der chemischen Zusammensetzung von Baustoffen vorgestellt. Dieses beruht auf der Kombination des Abtrags einer geringen Materialmenge durch einen gepulsten Laser, der Plasmaerzeugung und der Analyse der Lichtemission des Plasmas mittels optischer Spektroskopie. Es können prinzipiell alle Elemente gleichzeitig nachgewiesen werden. Damit ist es möglich einerseits Informationen über den Baustoff an sich als auch über den Eintrag potentiell schädigender Elemente (z. B. Cl, C, Na, K, S) zu gewinnen. Das Verfahren kann automatisiert im Labor oder als mobile Version direkt vor Ort eingesetzt werden. Es liefert zweidimensionale Bilder der Elementverteilung in Echtzeit. Es kann ohne große Probenvorbereitung z. B. direkt an der Querschnittsfläche eines Bohrkernes gemessen werden. Die Messung dauert nur wenige Minuten. Das Prinzip der Messung, die Vor- und die Nachteile, sowie die verfügbare Gerätetechnik für den Einsatz im Labor oder direkt am Bauwerk werden vorgestellt. Abschließend werden praktische Beispiele für die Anwendung des LIBS-Verfahrens zur Erfassung des Chlorid-Eintrages, der Karbonatisierung und der Verteilung von Schwefel präsentiert. T2 - 9. Betonfachtagung CY - Berlin, Germany DA - 12.11.2019 KW - Chloride KW - Beton KW - LIBS KW - Schädigung PY - 2019 SP - 1 PB - InformationsZentrum Beton GmbH CY - Berlin AN - OPUS4-51675 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Günther, Tobias A1 - Völker, Tobias T1 - LIBS – Betonanalytik mir dem Laser N2 - Es wird ein alternatives Verfahren zur schnellen zweidimensionalen Analyse der chemischen Zusammensetzung von Baustoffen vorgestellt. Dieses beruht auf der Kombination des Abtrags einer geringen Materialmenge durch einen gepulsten Laser, der Plasmaerzeugung und der Analyse der Lichtemission des Plasmas mittels optischer Spektroskopie. Es können prinzipiell alle Elemente gleichzeitig nachgewiesen werden. Damit ist es möglich einerseits Informationen über den Baustoff an sich als auch über den Eintrag potentiell schädigender Elemente (z. B. Cl, C, Na, K, S) zu gewinnen. Das Verfahren kann automatisiert im Labor oder als mobile Version direkt vor Ort eingesetzt werden. Es liefert zweidimensionale Bilder der Elementverteilung in Echtzeit. Es kann ohne große Probenvorbereitung z. B. direkt an der Querschnittsfläche eines Bohrkernes gemessen werden. Die Messung dauert nur wenige Minuten. Das Prinzip der Messung, die Vor- und die Nachteile, sowie die verfügbare Gerätetechnik für den Einsatz im Labor oder direkt am Bauwerk werden vorgestellt. Abschließend werden praktische Beispiele für die Anwendung des LIBS-Verfahrens zur Erfassung des Chlorid-Eintrages, der Karbonatisierung und der Verteilung von Schwefel präsentiert. T2 - 9. Betonfachtagung CY - Berlin, Germany DA - 12.11.2019 KW - Chloride KW - Beton KW - LIBS KW - Schädigung PY - 2019 AN - OPUS4-51673 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weise, Frank T1 - AKR an Betonfahrbahndecken – ausgewählte Einflussgrößen und neuartige AKR-Vermeidungsstrategie N2 - In den letzten Jahren sind im deutschen Bundesautobahnnetz vermehrt Schäden an vor 2005 hergestellten Betonfahrbahndecken aufgetreten, die mit einer Alkali-Kieselsäure-Reaktion (AKR) in Verbindung gebracht werden. Vor diesem Hintergrund werden in diesem Beitrag zunächst die Voraussetzungen und ausgewählte Einflussgrößen für eine schädigende AKR aufgezeigt. Besondere Aufmerksamkeit wird dabei der Rolle des Tausalzeintrags durch den Winterdienst bei Betonfahrbahndecken geschenkt. So wird mit Löseversuchen in 1 M KOH-Lösung zweier Gesteinskörnungen bei 80 °C gezeigt, dass mit zunehmender NaCl-Zugabe die Löslichkeit von SiO2 zunimmt und die von Al2O3 eine Verminderung erfährt. Basierend auf dem so exemplarisch erbrachten Nachweis für die Verstärkung der schädigenden AKR durch das Tausalz wird die Notwendigkeit und Richtigkeit der Durchführung von AKR-Betonversuchen mit Alkalizufuhr im ARS 04/2013 zur zukünftigen Vermeidung von AKR-Schäden an Betonfahrbahndecken im Rahmen von Neubau- und Erneuerungsmaßnahmen im Bundesfernstraßennetz belegt. Zusätzlich durchgeführte WS-Grundprüfungen nach dem ARS 04/2013 mit den beiden Gesteinskörnungen der Löseversuche veranschaulichen, dass die nach der Alkali-Richtlinie des DAfStb als unbedenklich eingestuften Gesteinskörnungen bei den Betonversuchen mit Alkalizufuhr durchaus als alkaliempfindlich bewertet werden können. Dies wiederum führt zu einer Verminderung der für den Betonstraßenbau verfügba-ren Gesteinskörnungen. Vor diesem Hintergrund wird nach neuartigen AKR-Vermeidungsstrategien gesucht, die auch eine Verwendung der als grenzwertig alkaliemp-findlich eingestuften Gesteinskörnungen erlaubt. Einen möglichen Lösungsansatz stellt in diesem Kontext die Innenhydrophobierung des Fahrbahndeckenbetons dar. Es soll so durch die Behinderung des Feuchte- und Tausalzeintrags in den Beton der AKR-Schädigungsprozess signifikant vermindert werden. Für die Bewertung der Leistungsfähigkeit der Innenhydrophobierung zur Vermeidung bzw. Verminderung einer schädigenden AKR in Betonfahrbahndecken wird zurzeit im Auftrage der BASt an der BAM ein Forschungsvorha-ben bearbeitet. Im Rahmen dieses Beitrags werden erste Ergebnisse dieses Projekts vorge-stellt. So wird exemplarisch an einem Oberbeton (D > 8)/Unterbeton und einem Oberbeton 0/8 mit einer alkaliempfindlichen Gesteinskörnung der Einfluss zweier Hydrophobierungsmit-tel auf die Frisch- und Festbetoneigenschaften ganzheitlich aufgezeigt und bewertet. Bei Letz-teren stehen zunächst die mechanischen und hygrischen Parameter sowie der Frost-Tausalzwiderstand im Vordergrund. In einem weiteren Schritt wird der Einfluss beider Hydro-phobierungsmittel auf die schädigende AKR mittels AKR-Betonversuchen mit Alkalizufuhr beleuchtet. Dabei gelangen ergänzend zur Beurteilung des Tausalzeintrags die Laser-Induced Breakdown Spectroscopy (LIBS) und zur Bewertung der Ausprägung der AKR und sekundä-ren Ettringitbildung (SEB) die Dünnschliffmikroskopie zum Einsatz. T2 - 9. Betonfachtagung CY - Berlin, Germany DA - 12.11.2019 KW - AKR, Betonfahrbahndecke, Tausalzeintrag, Innenhydrophobierung PY - 2019 SN - 978-3-7640-0633-4 SP - 159 EP - 175 PB - Verlag Bau + Technik GmbH CY - Erkrath AN - OPUS4-51563 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schmid, Thomas A1 - Dariz, P. T1 - Raman Microspectroscopic Imaging of Binder Remnants in Historical Mortars Reveals Processing Conditions N2 - Binder remnants in historical mortars represent a record of the connection between the raw materials that enter the kiln, the process parameters, and the end product of the calcination. Raman microspectroscopy combines high structural sensitivity with micrometre to sub-micrometre spatial resolution and compatibility with conventional thin-sectional samples in an almost unique fashion, making it an interesting complementary extension of the existing methodological arsenal for mortar analysis. Raman spectra are vibrational fingerprints of crystalline and amorphous compounds, and contain marker bands that are specific for minerals and their polymorphic forms. Relative intensities of bands that are related to the same crystalline species change according to crystal orientations, and band shifts can be caused by the incorporation of foreign ions into crystal lattices, as well as stoichiometric changes within solid solution series. Finally, variations in crystallinity affect band widths. These effects are demonstrated based on the analysis of three historical mortar samples: micrometric distribution maps of phases and polymorphs, crystal orientations, and compositional variations of solid solution series of unreacted clinker grains in the Portland cement mortars of two 19th century castings, and the crystallinities of thermal anhydrite clusters in a high-fired medieval gypsum mortar as a measure for the applied burning temperature were successfully acquired. KW - Cement clinker remnants KW - High-fired gypsum KW - Thermal anhydrite KW - Spectroscopic imaging KW - Raman microscopy PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-515038 DO - https://doi.org/10.3390/heritage2020102 VL - 2 IS - 2 SP - 1662 EP - 1683 PB - MDPI CY - Basel AN - OPUS4-51503 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Panne, Ulrich T1 - Analytical Sciences: From Ostwald's maid to enabling science N2 - The talk will address the paradigm shift in Analytical Sciences in regard to chemistry as a discipline. To illustrate this metamorphose examples from spectroschemical analysis, ufluidics, bioanalysis, and the didgital transformation of analytical sciences are discussed. T2 - GDCh-Wissenschaftsforum 2019 CY - Aachen, Germany DA - 15.09.2019 KW - Spectrochemical analysis KW - Analytical Sciences PY - 2019 AN - OPUS4-51471 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schaumann, P. A1 - Schürmann, K. A1 - Pittner, Andreas A1 - Rethmeier, Michael T1 - Automatically Welded Tubular X-Joints for Jacket Substructures N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Therefore, this paper addresses fatigue tests of automatically welded tubular X-joints focusing on the location of the technical fatigue crack. The detected location of the technical crack is compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. Besides, the welding process of the automated manufactured tubular X-joints is presented. KW - Tubular X-joints KW - Fatigue tests KW - Technical crack detection KW - Local fatigue spproaches PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-513228 DO - https://doi.org/10.1002/cepa.1140 VL - 3 IS - 3-4 SP - 823 EP - 828 PB - Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG CY - Berlin AN - OPUS4-51322 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Javaheri, E. A1 - Pittner, Andreas A1 - Graf, B. A1 - Rethmeier, Michael T1 - Instrumented indentation technique and its application for the determination of local material properties of welded steel structures N2 - The determination of mechanical properties of welded Steel structures such as strength or ductility is a subject of high interest for the majority of Companies in the area of metal Processing. The material Parameters can be obtained by performing the tensile test on the samples made from a part of a component. In some cases, it is highly expensive to produce the tensile specimens especially from the weld metal, which contains different type of microstructure such as weld seam or heat affected zone in an extremely small area. Therefore, a method is described in this paper to determine the material Parameters of high strength Steel structures and welded joints locally and without any additional effort to perform the tensile test. In this method, instrumented indentation technique (IIT), an indenter is pushed on the flat surface of a specimen in a certain period of time and simultaneously the applied force and the corresponding indentation path are measured. The data related to the force-indentation diagram is given as input to an artificial neural network (ANN) to obtain the material Parameters. The ANN can be trained by generating the large qualitative data sets with numerical Simulation of the IIT procedure. The Simulation must be run several times with the different material model parameter sets to generate the numerous force-indentation diagrams as the inputs of ANN. Then, the trained ANN is validated by performing the IIT on the welded joints and comparing the obtained material Parameters from ANN with the tensile test. Consequently, the mechanical properties of welded joints can be determined by performing the IIT and evaluating the resulting data by the ANN. T2 - 39. Assistentenseminar CY - Eupen, Germany DA - 12.09.2018 KW - Steel PY - 2019 SN - 978-396144-070-2 SP - 146 EP - 152 PB - DVS Media GmbH AN - OPUS4-51317 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schnieder, V. A1 - Gumenyuk, Andrey A1 - Rethmeier, Michael T1 - Additive Fertigung von Nickel-Titan-Formgedächtnislegierungen aus den Elementpulvern mittels Laserpulverauftragschweißen N2 - Additive Fertigungsverfahren gewinnen aufgrund der schnellen, flexiblen und kosten-günstigen Fertigung von Bauteilen zunehmend an Bedeutung. Das Laserpulverauf-tragschweißen (LPA) wurde anfangs hauptsächlich als Beschichtungsverfahren ein-gesetzt. Diese Technologie bewerkstelligt aber auch das Reparieren von verschlisse-nen Bauteilen, sodass diese zeitsparend und ressourcenschonend erneuert werden können. Die hohe Aufbaurate, die flexible Pulverzusammensetzung sowie die hohe Endkonturnähe ermöglichen heutzutage die Entwicklung und additive Fertigung von neuen Materialien, wie zum Beispiel Nickel-Titan-Formgedächtnislegierungen. T2 - 39. Assistentenseminar CY - Eupen, Germany DA - 12.09.2018 KW - Laserpulverauftragschweißen PY - 2019 SN - 978-3-96144-070-2 SP - 27 EP - 33 PB - DVS Media GmbH AN - OPUS4-51316 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bühling, Benjamin A1 - Strangfeld, Christoph A1 - Maack, Stefan T1 - OsciCheck - Fluidische Erzeugung eines luftgekoppelten Ultraschallpulses N2 - Das ZIM-Projekt OsciCheck wird vorgestellt, die Funktionsweise eines fluidischen Oszillators erläutert und die nächsten Arbeitsschritte im Projekt dargestellt. T2 - Herbstworkshop der jungen DEGA CY - Berlin, Germany DA - 01.11.2019 KW - Fluidischer Oszillator KW - Ultraschall KW - Luftgekoppelter Ultraschall KW - Zerstörungsfreie Prüfung PY - 2019 AN - OPUS4-51294 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Knorr, Annett A1 - Fayet, G. A1 - Rotureau, P. A1 - Wehrstedt, Klaus-Dieter T1 - Predictive Methods for Determining the Thermal Decomposition Properties of Hazardous Substances N2 - Due to the fast development and availability of computers, predictive approaches are increasingly used in the evaluation process of hazardous substances complementary to experiments. Their use was recommended as alternative to experimental testing by the REACH regulation to complete the lack of knowledge on properties for existing substances that must be registered before 2018 (upon quantities). Among the proposed predictive approaches, Quantitative Structure Property Relationships (QSPR) are powerful methods to predict macroscopic properties from the only molecular structure of substances. In that context, the HAZPRED project (2015-2018, founded by the SAF€RA consortium) aims to develop theoretical models (e.g. QSPR) and small-scale tests to predict complex physico-chemical properties (e.g. thermal stability, explosivity) of hazardous substances to complete the lack of knowledge on these hazardous substances quickly or to understand their decomposition behaviour better. In particular, this contribution will present the work done in this project on the physical hazards of organic peroxides and self-reactive substances: gathering of existing experimental data, new experimental campaigns, review of existing models and proposition of new estimation methods. KW - QSPR KW - HAZPRED KW - Organic peroxides KW - Self-reactive substances PY - 2019 UR - https://www.aidic.it/ DO - https://doi.org/10.3303/CET1977057 SN - 2283-9216 VL - 77 SP - 337 EP - 342 PB - AIDIC CY - Milano AN - OPUS4-51282 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pimentel, A. S. O. A1 - Guesser, W. L. A1 - Portella, Pedro Dolabella A1 - Woydt, Mathias A1 - Burbank, J. T1 - Slip-rolling behavior of ductile and austempered ductile iron containing niobium or chromium N2 - The use of high niobium alloyed cast iron alloys is a relatively new approach in which the niobium addition intends to improve the properties of the material by the precipitation of hard niobium carbides during solidification. Steels can be replaced by ductile cast iron in some rolling applications, such as gears and cams, in order to reduce material costs. The aim of this work is to evaluate ductile iron alloyed with 1 weight percent (wt.%) niobium for the as cast specimens and with 1.8 wt.% and 2.4 wt.% niobium for the austempered specimens under lubricated slip-rolling tests using mixed/boundary conditions in an Amsler-type machine. Austempered ductile iron (ADI) alloyed with 1 wt.% chromium, or Carbidic ADI, was tested for comparison. For the as cast conditions, the niobium addition resulted in an increase of wear resistance owing to the low contact pressure of these tests. However, for the austempered specimens, the best performance was found for unalloyed ADI. The main factor acting in the initiation and propagation of cracks in ductile iron is the presence of the graphite nodules. The coarse carbides also contributed to the initiation of cracks and spalling of the material. KW - Ductile iron KW - Niobium alloying KW - Slip-rolling KW - Carbidic austempered ductile iron PY - 2019 DO - https://doi.org/10.1520/MPC20180188 SN - 2165-3992 SN - 2379-1365 VL - 8 IS - 1 SP - 402 EP - 418 PB - ASTM International CY - West Conshohocken, Pa. AN - OPUS4-51209 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Linnemann, Konrad A1 - Quercetti, Thomas A1 - Ballheimer, Viktor A1 - Rolle, Annette A1 - Wille, Frank A1 - Kalinina, Elena T1 - Experimentelle und numerische Untersuchungen zur Bewertung der Integrität abgebrannter Brennelemente unter Transportbedingungen N2 - Packages for the transport of spent nuclear fuel shall meet the International Atomic Energy Agency regulations to ensure safety under different transport conditions. The physical state of the spent fuel and the fuel rod cladding as well as the geometric configuration of fuel assemblies are important inputs for the evaluation of the package capabilities under these conditions. The mechanical behavior of spent fuel assemblies shall be analyzed with regard to the assumptions which are used in the containment and criticality safety analysis. The package as a mechanical system is characterized by a complex set of interactions, e. g. between the fuel rods within the assembly as well as between the fuel assemblies, the basket, and the cask containment. This complexity makes it difficult to assume appropriate mechanical loads for the spent fuel inside the package. Another challenge is the assumption of material properties which represent the variation of the fuel rods regarding cladding material, burn-up and the operation history sufficiently. The objective of this paper is to give an overview about the current approaches and research for the evaluation of spent fuel behavior within the package design approval procedure. In this context, analytical, numerical and experimental results are discussed. The presented work is achieved within a collaboration of BAM with national and international partners. T2 - BGZ Fachworkshop Zwischenlagerung CY - Berlin, Germany DA - 22.10.2019 KW - Transportbehälter KW - Radioaktive Stoffe KW - Brennelementverhalten KW - FE-Berechnungen PY - 2019 AN - OPUS4-51174 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -