Sequence of distinct microyielding stages of the monocrystalline nickel-base superalloy CMSX-6 at high temperatures

  • The microyielding behaviour of the monocrystalline nickel-base superalloy CMSX-6 has been studied experimentally in tensile tests up to small strains at 900 °C, 1000 °C and 1100 °C and by transmission electron microscopy of the deformed specimens. Inspection of the microyielding stress-strain curve with highly resolved plastic strain showed four distinct stages of deformation at the lowest temperature (900 °C) but not at the two higher temperatures. By considering the superposition of the external stress with the original coherency stresses and with the deformation-induced internal stresses and by inspection of the electron micrographs, these deformation stages could be assigned to successive dislocation glide processes in the horizontal and vertical -channels and, finally, in the ′-particles.

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Metadaten
Author:S. Reichstein, S. Kraft, H. Mughrabi
DOI:https://doi.org/10.3139/146.110061
ISSN:2195-8556
Parent Title (English):International Journal of Materials Research
Publisher:de Gruyter
Document Type:Article
Language:English
Release Date:2024/12/09
Volume:100
Issue:4
Pagenumber:6
First Page:494
Last Page:499
institutes:Fakultät Werkstofftechnik
Research Themes:Materialien & Produktionstechnik
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