TY - GEN A1 - Rack, A. A1 - Zabler, S. A1 - Riesemeier, Heinrich A1 - Weidemann, Gerd A1 - Müller, Bernd R. A1 - Helfen, L. A1 - Stiller, M. A1 - Knabe, C. A1 - Goebbels, Jürgen A1 - Banhart, J. T1 - Nondestructive 3D insights into foamy metals and bioregenerative ceramics KW - X-ray Computed Tomography KW - Metal foams KW - Bioregenerative ceramics PY - 2008 UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/infos/bessy/highlights2007.pdf#page=34 SN - 1611-6127 SP - 34 EP - 35 PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung CY - Berlin AN - OPUS4-17538 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rack, A. A1 - Riesemeier, Heinrich A1 - Zabler, S. A1 - Weitkamp, T. A1 - Müller, Bernd R. A1 - Weidemann, Gerd A1 - Modregger, P. A1 - Banhart, J. A1 - Helfen, L. A1 - Danilewsky, A.N. A1 - Gräber, H.G. A1 - Heldele, R. A1 - Mayzel, B. A1 - Goebbels, Jürgen A1 - Baumbach, T. ED - Stuart R. Stock, T1 - The high-resolution synchrotron-based imaging stations at the BAMline (BESSY) and TopoTomo (ANKA) N2 - The BAMline at the BESSY light source in Berlin and the TopoTomo beamline at the ANKA synchrotron facility in Karlsruhe (both Germany) operate in the hard X-ray regime (above 6 keV) with similiar photon flux density. For typical imaging applications, a double multilayer monochromator or a filtered white beam is used. In order to optimise the field of view and the resolution of the available indirect pixel detectors, different optical systems have been installed, adapted, respectively, to a large field of view (macroscope) and to high spatial resolution (microscope). They can be combined with different camera systems, ranging from 16-bit dynamic range slow-scan CCDs to fast CMOS cameras. The spatial resolution can be brought substantially beyond the micrometer limit by using a Bragg magnifier. The moderate flux of both beamlines compared to other 3rd generation light sources is compensated by a dedicated scintillator concept. For selected applications, X-ray beam collimation has proven to be a reliable approach to increase the available photon flux density. Absorption contrast, phase contrast, holotomography and refraction-enhanced imaging are used depending on the application. Additionally, at the TopoTomo beamline digital white beam synchrotron topography is performed, using the digital X-ray pixel detectors installed. KW - Microtomography KW - Non-destructive evaluation KW - Coherent imaging KW - X-ray refraction KW - X-ray phase contrast KW - Synchrotron-CT KW - Synchrotron instrumentation KW - Scintillator KW - Bragg magnification KW - Holotomography KW - X-ray topography PY - 2008 DO - https://doi.org/10.1117/12.793721 SN - 0277-786X VL - 7078 SP - 70780X-1 - 70780X-9 AN - OPUS4-18296 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Müller, Bernd R. A1 - Lange, Axel A1 - Harwardt, Marco A1 - Hentschel, Manfred P. A1 - Illerhaus, Bernhard A1 - Goebbels, Jürgen A1 - Bamberg, J. A1 - Heutling, F. ED - Danny Van Hemelrijck, ED - Igor Solodov, ED - Anastasopoulos, Athanasios ED - Gerhard Busse, T1 - Synchrotron-Refraction-Computed-Tomography for NDT and characterisation of lightweight composite materials T2 - 4th International Conference of Emerging Technologies in Non-Destructive Testing (ETNDT 4) CY - Stuttgart, Germany DA - 2007-04-02 KW - Refraction KW - Computed Tomography KW - NDE KW - Ti-MMC PY - 2008 SN - 978-0-415-46476-5 SP - 217 EP - 221 PB - Taylor & Francis CY - London, UK AN - OPUS4-18680 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Müller, W.H. A1 - Worrack, H. A1 - Sterthaus, Jens A1 - Villain, J. A1 - Wilden, J. A1 - Juritza, A. T1 - How to extract continuum materials properties for (lead-free) solders from tensile tests and nanoindentation experiments N2 - Fabrication of modern microelectronic components requires miscellaneous solder materials for joining. In order to guarantee the quality of the manufacturing process and the reliability of the resulting solder joint it is necessary to know the material properties of the joining parts and of the solder materials. In particular Young’s modulus, yield stress, and the hardness are of great interest. Moreover, a complete stress-strain curve is important for a detailed material characterization and simulation of a component, e.g., by Finite Elements (FE). The miniaturization of modern electronic products with small solder joints allows only fabrication of very small-sized specimens. Because of this miniature tests are used for measuring the mechanical properties of the solders in the experimental investigations of this paper. More specifically two miniature tests are presented and discussed, a mini-uniaxial-tension-test and a nanoindenter experiment. In the tensile test the axial loading is prescribed, the corresponding extension of the specimen length is recorded, both of which determines the stress-strain- curve directly. The stress-strain curves are then mathematically analyzed by assuming a non-linear relationship between stress and strain of the Ramberg-Osgood type and fitting the corresponding parameters to the experimental data by means of an optimization routine. For a detailed analysis of very local mechanical properties nanoindentation is used, resulting primarily in load vs. indentation-depth data. According to the procedure of Pharr and Oliver this data can be used to obtain hardness and Young’s modulus but not a complete stress-strain curve, at least not directly. In order to obtain such a stress-strain-curve, the nanoindentation experiment is combined with FE and the coefficients involved in the corresponding constitutive equation for stress and strain are obtained by means of the inverse method. Finally in this paper, the stress-strain curves from nanoindentation and tensile tests are compared for two materials, namely aluminum and steel and differences are explained in terms of the locality of the measured properties. KW - Inverse method KW - FEA KW - Stress-strain curves KW - Nanoindentation KW - Tensile tests PY - 2009 DO - https://doi.org/10.1007/s00542-008-0688-y SN - 0946-7076 SN - 1432-1858 VL - 15 IS - 1 SP - 45 EP - 55 PB - Springer CY - Berlin AN - OPUS4-19264 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Müller, Christina A1 - Bertovic, Marija A1 - Gaal, Mate A1 - Heidt, Heinrich A1 - Pavlovic, Mato A1 - Rosenthal, Martina A1 - Takahashi, K. A1 - Pitkänen, J. A1 - Ronneteg, U. T1 - Progress in evaluating the reliability of NDE systems - Paradigm shift N2 - The paper will give an overview of new methodology for evaluating the reliability of NDE systems accurately, reliably and efficiently in accordance with the specific requirements of industrial application. After a review of the substantive issues from the previous workshops, the go forward guidance from these interactions is considered. At the beginning of the reliability analysis, the actual safety demands have to be defined in order to fit the investigation to the level of risk when the component would fail. Next, all the essential influencing parameters need to be documented and transferred to an appropriate design of experiments (DOE) to determine the reliability in terms of a qualitative assessment for lower risk or in terms of a quantitative probability of detection (POD) or ROC (Receiver Operating Characteristics) curves for higher safety demands. A new paradigm is offered to consider the POD or reliability of the system as a function of the configuration of input variables and use it for optimisation rather than for a final judgement. An advantage for the end user is also to sample all single PODs to an integral 'Volume POD' of a part. Among the influencing parameters, the human factor is the most important one. A systematic psychological approach shall help to find out where the bottlenecks are but most importantly to provide best possible working conditions for the human inspectors. T2 - 4th European-American workshop on reliability of NDE CY - Berlin, Germany DA - 2009-06-24 KW - Zuverlässigkeit von ZfP-Systemen KW - Multiparameter POD PY - 2009 UR - http://www.ndt.net/article/reliability2009/Inhalt/we1a2.pdf SN - 978-3-940283-17-7 IS - DGZfP-BB 116 SP - 1 EP - 13 AN - OPUS4-20616 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Takahashi, K. A1 - Pavlovic, Mato A1 - Ronneteg, U. A1 - Pitkänen, J. A1 - Müller, Christina T1 - Probability of detection from C-scan data for reliability analysis of ultrasonic non-destructive testing T2 - 4th European-American workshop on reliability of NDE CY - Berlin, Germany DA - 2009-06-24 KW - POD KW - UT KW - Reliability KW - C-scan PY - 2009 SN - 978-3-940283-17-7 IS - DGZfP-BB 116 SP - 1 EP - 7 AN - OPUS4-20617 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Pavlovic, Mato A1 - Takahashi, K. A1 - Ronneteg, U. A1 - Pitkänen, J. A1 - Müller, Christina T1 - Multi-parameter influence on the response of the flaw to the phased array ultrasonic NDT system. The volume POD. T2 - 4th European-American workshop on reliability of NDE CY - Berlin, Germany DA - 2009-06-24 KW - POD KW - Reliability KW - Multi-parameter signal response PY - 2009 SN - 978-3-940283-17-7 IS - DGZfP-BB 116 SP - 1 EP - 6 AN - OPUS4-20618 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pitkänen, J. A1 - Salonen, T. A1 - Bertovic, Marija A1 - Müller, Christina A1 - Pavlovic, Mato T1 - NDT reliability in risk minimization during manufacturing and welding of spent nuclear fuel disposal components - a realistic tool for reliable inspections T2 - 4th European-American workshop on reliability of NDE CY - Berlin, Germany DA - 2009-06-24 KW - NDT reliability KW - Spent nuclear fuel KW - EB-weld PY - 2009 UR - http://www.ndt.net/article/reliability2009/Inhalt/fr1a2.pdf IS - Fr.1.A.2 SP - 1 EP - 21 AN - OPUS4-26082 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, B. A1 - Danielak, M. A1 - Zeidler, O. A1 - Jann, Oliver A1 - Horn, Wolfgang A1 - Müller, D. A1 - Panaskova, J. A1 - Plehn, W. T1 - Labelling of building materials - A combination of emission tests with odour tests T2 - Healthy buildings 2009 - 9th International conference & exhibition CY - Syracuse, NY, USA DA - 2009-09-13 KW - Labelling systems KW - VOCs KW - Odour KW - Sensory tests KW - Emission tests PY - 2009 IS - Paper 323 SP - 1 EP - 4 CY - Syracuse, NY, USA AN - OPUS4-19927 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Deubener, J. A1 - Bornhöft, H. A1 - Reinsch, Stefan A1 - Müller, Ralf A1 - Lumeau, J. A1 - Glebova, L.N. A1 - Glebov, L.B. T1 - Viscosity, relaxation and elastic properties of photo-thermo-refractive glass KW - Ultrasonic relaxation KW - Silicates KW - Rheology KW - Structural relaxation KW - Viscosity PY - 2009 DO - https://doi.org/10.1016/j.noncrysol.2008.10.002 SN - 0022-3093 VL - 355 SP - 126 EP - 131 PB - North-Holland Publ. Co. CY - Amsterdam AN - OPUS4-18671 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -