TY - JOUR A1 - Brückner, Udo A1 - Link, T. A1 - Epishin, A. T1 - Moiré fringes for misfit measurements at incoherent y/y'-interfaces of nickel-base superalloys PY - 1998 U6 - https://doi.org/10.1016/S1359-6462(98)00337-6 SN - 0956-716X VL - 39 IS - 10 SP - 1463 EP - 1469 PB - Pergamon Press CY - Elmsford, NY AN - OPUS4-942 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Epishin, Alexander A1 - Link, T. A1 - Brückner, Udo T1 - Microstructural stability of CMSX-4 and CMSX-10 under high temperature creep conditions T2 - 8th Liège Conference "Materials for Advanced Power Engineering 2006" CY - Liege, Belgien DA - 2006-01-01 KW - Superalloys KW - CMSX-4 KW - Creep KW - Microstructure KW - CMSX-10 PY - 2006 SN - 3-89336-436-6 N1 - Serientitel: Schriften des Forschungszentrums Jülich - Reihe Energietechnik / Energy Technology – Series title: Schriften des Forschungszentrums Jülich - Reihe Energietechnik / Energy Technology IS - 53 SP - 507 EP - 520 PB - Forschungszentrum Jülich CY - Jülich AN - OPUS4-13702 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Epishin, Alexander A1 - Brückner, Udo A1 - Link, T. A1 - Portella, Pedro Dolabella ED - Dias, A. T1 - Investigation of stresses in superalloys by analysis of y/y'-Microstructure T2 - 6th European Conference on Residual Stresses CY - Coimbra, Portugal DA - 2002-07-10 KW - Superalloys KW - Stress KW - Misfit KW - Rafting PY - 2002 SN - 0-87849-900-8 SN - 0255-5476 N1 - Serientitel: Materials science forum – Series title: Materials science forum IS - 404/407 SP - 287 EP - 292 PB - Trans Tech Publ. CY - Uetikon-Zuerich AN - OPUS4-7147 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Epishin, Alexander A1 - Link, T. ED - Green, K. T1 - Mechanisms of high temperature creep of nickel-base superalloys under low applied stress T2 - Superalloys 2004 / 10th International Symposium on Superalloys 2004 CY - Seven Springs, PA, USA DA - 2004-09-19 KW - Superalloys KW - Creep KW - Porosity KW - Dislocations KW - Diffusion PY - 2004 SN - 0-87339-576-X SP - 137 EP - 143 PB - TMS CY - Warrendale AN - OPUS4-7149 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Alymov, M. I. A1 - Epishin, Alexander A1 - Nolze, Gert A1 - Link, T. A1 - Bedov, S. A1 - Ankudinov, A. B. T1 - Electron microscopy investigation of the structure of a compact extruded from nanopowder of nickel KW - EBSD KW - SAED KW - TEM KW - SEM KW - Extrusion KW - Nano-technology PY - 2007 SN - 1816-5230 VL - 2 IS - 3-4 SP - 124 EP - 129 PB - Akademperiodyka CY - Kyïv AN - OPUS4-14845 LA - rus AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Link, T. A1 - Epishin, Alexander A1 - Thibault, X. A1 - Haibel, A. T1 - High resolution synchrotron topography of Nickelbase superalloys T2 - 69. DPG Physikertagung CY - Berlin, Germany DA - 2006-03-07 PY - 2006 AN - OPUS4-12176 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Link, T. A1 - Epishin, Alexander A1 - Thibault, X. A1 - Haibel, A. T1 - High resolution synchrotron topography of Nickelbase superalloys T2 - European Congress on Advanced Materials and Processes, EUROMAT 2005 CY - Prague, Czech Republic DA - 2005-09-05 PY - 2005 AN - OPUS4-12177 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Epishin, A.I. A1 - Link, T. A1 - Fedelich, Bernard A1 - Svetlov, I.L. A1 - Golubovskiy, E.R. T1 - Hot isostatic pressing of single-crystal nickel-base superalloys: mechanism of pore closure and effect on mechanical properties N2 - Pore annihilation was investigated in the single-crystal nickel-base superalloy CMSX-4. HIP tests at 1288 °C/103 MPa were interrupted at different times, then the specimens were investigated by TEM, metallography and density measurements. The kinetics of pore annihilation was determined. The pore closure mechanism was identified as plastic deformation on the octahedral slip systems. A model describing the kinetics of pore closure has been developed on the base of crystal plasticity and large strain theory. Mechanical tests with the superalloy CMSX-4 and the Ru-containing superalloy VGM4 showed, that HIP significantly increases the fatigue life at low temperatures but has no effect on creep strength. T2 - Eurosuperalloys 2014 - 2nd European symposium on superalloys and their applications CY - Giens, France DA - 12.05.2014 PY - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-316410 N1 - Serientitel: MATEC Web of conferences – Series title: MATEC Web of conferences VL - 14 SP - 08003-1 EP - 08003-6 PB - EDP Sciences AN - OPUS4-31641 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Epishin, A. A1 - Link, T. A1 - Svetlov, I. L. A1 - Nolze, Gert A1 - Saliwan Neumann, Romeo A1 - Lucas, H. T1 - Mechanism of porosity growth during homogenisation in single crystal nickel-based superalloys N2 - Several mechanisms for porosity growth in single crystal nickel-based superalloys during homogenisation heat treatment have been proposed in the literature. They were carefully checked using different experimental methods, namely quantitative light microscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction and density measurements. It is shown that the main mechanism is the Kirkendall–Frenkel effect, i.e. generation of voids due to uncompensated efflux of Al atoms from dissolving γ/γ′-eutectic areas. The Al diffusion is supported by the afflux of vacancies from surrounding γ-matrix which results in porosity growth. This conclusion is confirmed by the estimation of the vacancy afflux towards the dissolving eutectic. KW - Ni-base superalloy KW - Eutectic KW - Vacancies KW - Porosity PY - 2013 VL - 104 IS - 8 SP - 776 EP - 782 PB - Carl Hanser Verlag AN - OPUS4-37983 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Epishin, A. I. A1 - Link, T. A1 - Nolze, Gert A1 - Svetlov, I. L. A1 - Bokshtein, B. S. A1 - Rodin, A. O. A1 - Saliwan Neumann, Romeo A1 - Oder, Gabriele T1 - Diffusion processes in multicomponent nickel-base superalloy-nickel system N2 - Optical and scanning electron microscopy, as well as electron microprobe analysis and electron backscatter diffraction, have been used to study diffusion processes that occur in a diffusion pair that consistsof a single-crystal CMSX-10 nickel-base superalloy and polycrystalline nickel, at temperatures of 1050–1250°C. It has been found that, in this system, the distributions of γ-stabilizing elements (Cr, Co, W, and Re) are described by the Boltzmann solution for diffusion between two semiinfinite plates of a binary alloy. The processing of these distributions has shown that the diffusion coefficients of Cr, Co, W, and Re in the multicomponent system are close to those in binary alloys of these elements with Ni. The diffusion redistribution of the elements leads to the dissolution of the γ′ phase in the nickel-base superalloy, growth of nickel grains toward the superalloy constituent of the diffusion pair, and the formation of porosity on both sides of the migrating interface, which is determined from a crystal misorientation of the alloy single crystal and nickel grains. KW - Ni-base superalloy KW - Interface KW - Diffusion KW - Phase transformation KW - Porosity PY - 2014 SN - 0031-918X VL - 115 IS - 1 SP - 21 EP - 29 AN - OPUS4-37980 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -