caa a22 4500 463233751 CHVBK 20180405153250.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0166-9 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0166-9 L12-phase cutting during high temperature and low stress creep of a Re-containing Ni-base single crystal superalloy [Elektronische Daten] [A. Kostka, G. Mälzer, G. Eggeler, A. Dlouhy, S. Reese, T. Mack] In the present study, we investigate dislocation processes in a Ni-base single crystal superalloy (LEK94) after high temperature and low stress creep. Specimens were creep deformed at 240MPa and 980°C to a strain of 20%. We use diffraction contrast transmission electron microscopy (TEM) to show that two γ-channel dislocations with different Burgers vectors combine and form a super dislocation that shears the γ′-particle. This type of cutting event has now been observed for three single crystal superalloys with different alloy chemistry (CMSX-4, CMSX-6 and LEK94 in the present work) and we therefore conclude that it represents a generic elementary dislocation process which governs high temperature (around 1000°C) and low stress (around 240MPa) creep. The present paper provides microstructural evidence for this type of cutting processes and discusses the results in the light of previous work published in the literature. Springer Science+Business Media, LLC, 2007 Kostka A. Institut für Werkstoffe, Ruhr-Universität Bochum, 44780, Bochum, Germany aut Mälzer G. Institut für Werkstoffe, Ruhr-Universität Bochum, 44780, Bochum, Germany aut Eggeler G. Institut für Werkstoffe, Ruhr-Universität Bochum, 44780, Bochum, Germany aut Dlouhy A. Institute of Physics of Materials, Academy of Sciences of the Czech Republic, 616 62, Brno, Czech Republic aut Reese S. Institut für Mechanik, Ruhr-Universität Bochum, 44780, Bochum, Germany aut Mack T. MTU Aero Engines GmbH, Dachauer Str. 665, 80995, München, Germany aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/11(2007-06-01), 3951-3957 0022-2461 42:11<3951 2007 42 10853 https://doi.org/10.1007/s10853-006-0166-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0166-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kostka A. Institut für Werkstoffe, Ruhr-Universität Bochum, 44780, Bochum, Germany aut NATIONALLICENCE 700 1- Mälzer G. Institut für Werkstoffe, Ruhr-Universität Bochum, 44780, Bochum, Germany aut NATIONALLICENCE 700 1- Eggeler G. Institut für Werkstoffe, Ruhr-Universität Bochum, 44780, Bochum, Germany aut NATIONALLICENCE 700 1- Dlouhy A. Institute of Physics of Materials, Academy of Sciences of the Czech Republic, 616 62, Brno, Czech Republic aut NATIONALLICENCE 700 1- Reese S. Institut für Mechanik, Ruhr-Universität Bochum, 44780, Bochum, Germany aut NATIONALLICENCE 700 1- Mack T. MTU Aero Engines GmbH, Dachauer Str. 665, 80995, München, Germany aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/11(2007-06-01), 3951-3957 0022-2461 42:11<3951 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer