TY - JOUR
T1 - Effects of microstructure on material properties of modified 9Cr-1Mo steel subject to creep-fatigue
AU - Muramatsu, Mayu
AU - Suzuki, Takayuki
AU - Nakasone, Yuji
N1 - Publisher Copyright:
© 2015, The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2015/1
Y1 - 2015/1
N2 - The creep-fatigue properties of modified 9Cr-1Mo steel were studied to elucidate the effects of the microstructure on specimens deformed by fatigue and creep-fatigue via stress holding for 30 min at 550°C. First, creep-fatigue behaviors up to 7.8% nominal strains were obtained with respect to the deformation conditions. Next, the micro Vickers hardness values were determined to measure the creep-fatigue properties of the deformed materials. Electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were used to determine the grain diameters and grain average misorientations (GAMs) and distributions of dislocations and precipitates, respectively. These observations explained the creep-fatigue properties of the deformed specimens. The differences in the properties of materials subjected to fatigue and creep-fatigue are discussed both macroscopically and microscopically.
AB - The creep-fatigue properties of modified 9Cr-1Mo steel were studied to elucidate the effects of the microstructure on specimens deformed by fatigue and creep-fatigue via stress holding for 30 min at 550°C. First, creep-fatigue behaviors up to 7.8% nominal strains were obtained with respect to the deformation conditions. Next, the micro Vickers hardness values were determined to measure the creep-fatigue properties of the deformed materials. Electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were used to determine the grain diameters and grain average misorientations (GAMs) and distributions of dislocations and precipitates, respectively. These observations explained the creep-fatigue properties of the deformed specimens. The differences in the properties of materials subjected to fatigue and creep-fatigue are discussed both macroscopically and microscopically.
KW - Creep-fatigue property
KW - Electron backscatter diffraction
KW - High temperature
KW - Modified 9Cr-1Mo steel
KW - Transmission electron microscopy
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U2 - 10.1007/s12206-014-1219-7
DO - 10.1007/s12206-014-1219-7
M3 - Article
AN - SCOPUS:84921059362
SN - 1738-494X
VL - 29
SP - 121
EP - 129
JO - Journal of Mechanical Science and Technology
JF - Journal of Mechanical Science and Technology
IS - 1
ER -