TY - RPRT A1 - Klingelhöffer, Hellmuth A1 - Ledworuski, Siegmar A1 - Brookes, Stephan-Peter A1 - May, Thomas T1 - Computer controlled tensile testing according to EN 10002-1 Results of a comparison test programm to validate a proposal for an amendment of the standard N2 - Tensile testing according to EN 10002-1 is one of the basic mechanical tests to characterise the mechanical properties of metallic materials. This testing procedure has been regularly under development for many decades in order to modify and amend it and to bring it up to an up to date standard. Today tensile testing for quality control in metals manufacturing industry is routinely performed automatically with computer controlled testing machines. Due to economical needs of industry proposals were made by a European Standard Committee to amend the standard EN 10002-1. A European research project with the acronym TENSTAND was started to validate the proposed modifications of the tensile testing standard. The work package 4 of the project was to validate the machine control characteristics. A comparison test program was started with ten partners, 4 test piece geometries and 3 test parameters for 6 materials, partly with upper and lower yield strength and partly with 0.2 % proof strength to compare experimental results according to the proposal to modify the standard EN 10002-1. Initially testing in the strain control mode was introduced as well as switching of the control mode to crosshead control 1 and switching of the testing speed at appropriate points during the test. The comparison test was evaluated statistically and scientifically. The following conclusions were derived from the comparison test and summarised as recommendations to the standard committees. The scatter of the material properties were not significantly reduced by introducing the amended testing procedure. Few of the reasons for the continuously observed scattercan be identified as follows: The material properties are observed to be widely dependent on the testing speed. As a consequence the range for the allowed testing speed must be reduced. The closed loop control was not optimised sufficiently in some tests, the use of complicated testing machine software led to misinterpretation of software commands, individual testing equipment and implementation of the tensile testing procedure led also to scatter of the material properties which lay in a range of few percent. This is blurred by the inhomogeneity of the material. T3 - BAM Forschungsberichtreihe - 268 PY - 2005 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-1835 SN - 978-3-86509-318-3 SN - 0938-5533 VL - 268 SP - 1 EP - 44 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-183 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Darowski, N. A1 - Zizak, I. A1 - Schumacher, G. A1 - Klingelhöffer, Hellmuth A1 - Chen, W. A1 - Neumann, W. T1 - Temperature dependence of x-ray intensity profile FWHM of the gamma' phase in the creep-deformed single crystal superalloy SC16 N2 - High-resolution diffraction using synchrotron x-ray radiation was applied to study γ´ precipitates with an L12 superlattice crystal structure in the single crystal superalloy SC16 after creep deformation at 1223 K with a creep strain of ±0.5% for tensile and compressive loads, respectively. The measurements of full width at half maximum (FWHM) of 001 and 100 γ´ superlattice reflections were performed at various temperatures from ambient temperature to 1173 K in vacuum. The experimental results revealed that the FWHM of both reflections decrease with increasing temperature. It is well-known that changes in particle size and lattice distortion in materials could lead to a variation of FWHM. The observed behaviour is discussed in the light of both the above-mentioned aspects. The decrease in the peak width is mainly attributed to the temperature dependence of the internal strain state. KW - Creep deformation KW - Synchrotron x-ray radiation PY - 2005 DO - https://doi.org/10.1088/0022-3727/38/10A/038 SN - 0022-3727 SN - 1361-6463 VL - 38 IS - 10A SP - A200 EP - A203 PB - IOP Publ. CY - Bristol AN - OPUS4-11967 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Klingelhöffer, Hellmuth A1 - Matzak, Kathrin A1 - Kühn, Hans-Joachim A1 - Skrotzki, Birgit T1 - Einfluss des Auswerteverfahrens auf die Bestimmung von zyklischen Werkstoffdaten im Hochtemperatur-LCF-Bereich T2 - 28. VDEh Vortragsveranstaltung der Arbeitsgemeinschaft für warmfeste Stähle und der Arbeitsgemeinschaft für Hochtemperaturwerkstoffe "Langzeitverhalten warmfester Stähle und Hochtemperaturwerkstoffe" CY - Düsseldorf, Deutschland DA - 2005-11-25 KW - Normung KW - Low Cycle Fatigue PY - 2005 SP - 137 EP - 146 PB - Stahlinstitut VDEh CY - Düsseldorf AN - OPUS4-11560 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Brookes, Stephen-Peter A1 - Kühn, Hans-Joachim A1 - Skrotzki, Birgit A1 - Klingelhöffer, Hellmuth A1 - Sievert, Rainer A1 - Pfetzing, J. A1 - Peter, D. A1 - Eggeler, G. T1 - Multi-Axial Thermo-Mechanical Fatigue Of A Near-Gamma TiAl-Alloy N2 - A material family to replace the current superalloys in aeronautical gas turbine engines is considered to be that of gamma Titanium Aluminide (γ-TiAl) alloys. Structural components in aeronautical gas turbine engines typically experience large variations in temperatures and multiaxial states of stress under non-isothermal conditions. The uniaxial, torsional and bi-axial thermomechanical fatigue (TMF) behaviour of this γ-TiAl alloy have been examined at 400 – 800°C with strain amplitudes from 0.15% to 0.7%. The tests were conducted at both in-phase (IP) and out-ofphase (OP). The effects of TMF on the microstructure were also investigated. For the same equivalent mechanical strain amplitude uniaxial IP tests showed significantly longer lifetimes than pure torsional TMF tests. The non-proportional multiaxial OP test showed the lowest lifetimes at the same equivalent mechanical strain amplitude compared to the other types of tests. KW - Gamma-Titanium Aluminide KW - Thermo-mechanical Fatigue KW - Axial-torsional Loading PY - 2005 DO - https://doi.org/10.4028/3-908454-01-8.283 SN - 1022-6680 SN - 1662-8985 VL - 59 SP - 283 EP - 287 PB - Trans Tech Publ. CY - Zurich AN - OPUS4-18720 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Ledworuski, Siegmar A1 - Klingelhöffer, Hellmuth A1 - Brookes, Stephen-Peter A1 - May, Thomas ED - Pohl, M. T1 - Untersuchungen zum automatisierten Zugversuch für die Weiterentwicklung der Norm EN 10002-1 im Rahmen des Europäischen Forschungsprojektes TENSTAND T2 - Werkstoffprüfung - Konstruktion, Qualitätssicherung und Schadensanalyse CY - Neu-Ulm, Deutschland DA - 2004-11-24 KW - Zugversuch KW - TENSTAND KW - Dehngeschwindigkeit KW - Geschwindigkeitseinfluß KW - EN 10002-1 PY - 2004 SN - 3-88355-337-9 SP - 73 EP - 78 PB - Werkstoff-Informationsges. CY - Frankfurt AN - OPUS4-5608 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Klingelhöffer, Hellmuth A1 - Matzak, Kathrin A1 - Kühn, Hans-Joachim A1 - Ledworuski, Siegmar T1 - Cyclic stress strain behaviour T2 - HTMT-Seminar with concern to "Generation and application of materials property data" CY - Warrington, England DA - 2004-12-06 PY - 2004 AN - OPUS4-4830 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Chen, W. A1 - Darowski, N. A1 - Zizak, I. A1 - Schumacher, G. A1 - Klingelhöffer, Hellmuth A1 - Wanderka, N. A1 - Neumann, W. ED - Chandra, T. ED - Torralba, Jose M. ED - Sakai, T. T1 - Measurement of Gamma/Gamma' Lattice Mismatch in Creep Deformed SIngle Crystal Superalloy SC16 Using Synchrotron X-Radiation T2 - International Conference on Processing & Manufacturing of Advanced Materials CY - Leganés, Spain DA - 2003-07-07 KW - Superalloy KW - Lattice mismatch KW - High temperature KW - Creep deformed PY - 2003 SN - 0-87849-919-9 SN - 0255-5476 N1 - Serientitel: Materials science forum – Series title: Materials science forum IS - 426-432/5 SP - 4555 EP - 4560 PB - Trans Tech Publ. CY - Uetikon-Zürich AN - OPUS4-2790 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Burlet, H. A1 - McColvin, G. A1 - Henderson, M. B. A1 - Garcia, J. C. A1 - Peteves, S. A1 - Klingelhöffer, Hellmuth A1 - Maldini, M. A1 - Klotz, U. E. A1 - Luthi, T. A1 - Wilcock, I. M. ED - Strang, A. T1 - Microstructural and Mechanical Performance Assessment of Diffusion Bonded Bimetallic Model Discs T2 - 6th International Charles Parsons Turbine Conference CY - Dublin, Ireland DA - 2003-09-16 PY - 2003 SN - 1-904350-20-8 SN - 1366-5510 N1 - Serientitel: Book / The Institute of Materials, Minerals and Mining – Series title: Book / The Institute of Materials, Minerals and Mining IS - 800 SP - 735 EP - 748 PB - Maney CY - London AN - OPUS4-2823 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Darowski, N. A1 - Zizak, I. A1 - Schumacher, G. A1 - Wanderka, N. A1 - Klingelhöffer, Hellmuth A1 - Chen, W. A1 - Neumann, W. T1 - Lattice mismatch in creep-deformed single crystal superalloy SC16 PY - 2003 UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2002.pdf#page=283 SN - 0179-4159 SP - 283 EP - 285 PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung CY - Berlin AN - OPUS4-2491 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Klingelhöffer, Hellmuth A1 - Gründer, Klaus-Peter T1 - Sichere und zuverlässige Anwendung von Werkstoffen - Optische Verfahren zur Untersuchung von Nickel-Basis-Legierungen T2 - Materials Week 2002, Materialica CY - Munich, Germany DA - 2002-09-30 PY - 2002 AN - OPUS4-6129 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Schumacher, Gerhard A1 - Klingelhöffer, Hellmuth A1 - Rehfeldt, T. T1 - Changes in lattice structure and microhardness during thermal treatment of a NiCoCrAIY alloy N2 - The stability of microstructure and the microhardness of a NiCoCrAlY alloy was studied after thermal treatment at high temperatures and subsequent quenching into ice water. The alloy revealed mainly two ordered phases, a gamma' phase with L12 lattice structure and a beta phase with B2 structure. The gamma' phase is shown to become unstable in the temperature range between 1073 K and 1373 K where it undergoes an order-disorder phase transformation. The low transformation temperature compared to pure Ni3Al is ascribed to deviations from the Ni3Al stoichiometry and to the additional alloying elements Co and Cr. The gamma'-gamma order-disorder transformation is shown to be attended by a decrease in microhardness of about 30 %. T2 - Symposium M: Thermal Barrier Coatings; MRS (Materials Research Society) fall meeting CY - Boston, MA, USA DA - 2000-01-01 PY - 2000 SN - 0272-9172 N1 - Serientitel: Materials Research Society symposium proceedings – Series title: Materials Research Society symposium proceedings IS - 645 PB - Materials Research Society CY - Warrendale, Pa. AN - OPUS4-1052 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Bettge, Dirk A1 - Fedelich, Bernard A1 - Klingelhöffer, Hellmuth T1 - Modelling the orientation and direction dependence of the critical resolved shear stress of nickel-base superalloy single crystals PY - 2000 SN - 1359-6454 SN - 1873-2453 VL - 48 SP - 689 EP - 700 PB - Elsevier Science CY - Kidlington AN - OPUS4-2366 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Ziebs, Josef A1 - Meersmann, Jürgen A1 - Kühn, Hans-Joachim A1 - Klingelhöffer, Hellmuth ED - Sehitoglu, H. ED - Maier, H. T1 - Multiaxial Thermo-mechanical Deformation Behavior of IN 738 LC and SC 16 T2 - 3rd Symposium "Thermo-mechanical fatigue behavior of materials" CY - Norfolk, VA, USA DA - 1998-11-04 PY - 2000 SN - 0-8031-2853-3 SN - 0066-0558 N1 - Serientitel: ASTM STP – Series title: ASTM STP VL - 1371 SP - 257 EP - 278 PB - ASTM, American Society for Testing and Materials CY - West Conshohocken, Pa. AN - OPUS4-3128 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Ziebs, Josef A1 - Klingelhöffer, Hellmuth A1 - Meersmann, Jürgen A1 - Frenz, Holger T1 - Gesetzmäßigkeiten für die werkstoffmechanische Beschreibung der einkristallinen Nickelbasislegierung SC 16 unter ein- und mehrachsiger Beanspruchung. N2 - Ein umfassender Überblick zum aktuellen Kenntnisstand von Nickelbasis-Legierungen am Beispiel von IN 738 LC und SC 16 unter ein- und mehrachsiger Hochtemperaturbeanspruchung. T3 - BAM Forschungsberichtreihe - 222 PY - 1997 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-2281 SN - 978-3-89701-037-2 SN - 0938-5533 VL - 222 SP - 1 EP - 48 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-228 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Frenz, Holger A1 - Kinder, Joachim A1 - Klingelhöffer, Hellmuth A1 - Portella, Pedro Dolabella ED - Petit, J. T1 - Fracture of single crystal superalloys under cyclic loading at high temperatures T2 - 11th Biennial European Conference on Fracture (ECF) CY - Poitiers-Futuroscope, France DA - 1996-09-03 KW - Einkristall KW - Superlegierung KW - Hochtemperaturverhalten KW - Turbine PY - 1996 SN - 0-947817-92-1 VL - 2 SP - 1207 EP - 1213 PB - EMAS CY - Warley, West Midlands AN - OPUS4-699 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Frenz, Holger A1 - Kinder, Joachim A1 - Klingelhöffer, Hellmuth A1 - Portella, Pedro Dolabella T1 - Microstructural evolution and fracture mechanisms of single crystal superalloys under cyclic loading at high temperatures T2 - 17. Tagung des DVM-Arbeitskreises Rastermikroskopie in der Materialprüfung CY - Halle (Saale), Deutschland DA - 1996-03-27 KW - Einkristall KW - Superlegierung KW - Hochtemperatur PY - 1996 N1 - Serientitel: Tagung des DVM-Arbeitskreises Rastermikroskopie in der Materialprüfung – Series title: Tagung des DVM-Arbeitskreises Rastermikroskopie in der Materialprüfung IS - 17 SP - 275 EP - 280 PB - DVM, Geschäftsstelle CY - Berlin AN - OPUS4-665 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -