Abstract
Cr-Mo-V rotor steel has been cycled to failure with and without tensile holds over a wide range of high strain amplitudes and at both room temperature and 823 K. The damage mechanisms have been examined by scanning electron microscopy observations of the gauge surfaces, of sections and of the fracture surfaces. The fatigue life in continuous cycling is not affected by temperature at the relatively high strain rate used but cycling with hold acts to reduce the life to crack initiation and also accelerates crack propagation. Much evidence of creep damage, including grain boundary cavitation, wedge-type cracking and cavitation at MnS inclusions, has been found, being promoted by high strain amplitudes and tensile holds. However, the life is dominated by fatigue mechanisms which seem to ignore the creep-type damage for the straining conditions used here.
| Original language | English |
|---|---|
| Pages (from-to) | 113 - 129 |
| Number of pages | 17 |
| Journal | Materials Science and Engineering |
| Volume | 73 |
| DOIs | |
| Publication status | Published - 1985 |
| MoE publication type | Not Eligible |
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The deformation and fatigue characteristics of 1Cr-1Mo-0.25V steel cycled at room temperature and an elevated temperature. / Wang, Zhong-Ghuang; Laird, Campbell; Rahka, Klaus.
In: Materials Science and Engineering, Vol. 73, 1985, p. 113 - 129.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - The deformation and fatigue characteristics of 1Cr-1Mo-0.25V steel cycled at room temperature and an elevated temperature
AU - Wang, Zhong-Ghuang
AU - Laird, Campbell
AU - Rahka, Klaus
PY - 1985
Y1 - 1985
N2 - Cr-Mo-V rotor steel has been cycled to failure with and without tensile holds over a wide range of high strain amplitudes and at both room temperature and 823 K. The damage mechanisms have been examined by scanning electron microscopy observations of the gauge surfaces, of sections and of the fracture surfaces. The fatigue life in continuous cycling is not affected by temperature at the relatively high strain rate used but cycling with hold acts to reduce the life to crack initiation and also accelerates crack propagation. Much evidence of creep damage, including grain boundary cavitation, wedge-type cracking and cavitation at MnS inclusions, has been found, being promoted by high strain amplitudes and tensile holds. However, the life is dominated by fatigue mechanisms which seem to ignore the creep-type damage for the straining conditions used here.
AB - Cr-Mo-V rotor steel has been cycled to failure with and without tensile holds over a wide range of high strain amplitudes and at both room temperature and 823 K. The damage mechanisms have been examined by scanning electron microscopy observations of the gauge surfaces, of sections and of the fracture surfaces. The fatigue life in continuous cycling is not affected by temperature at the relatively high strain rate used but cycling with hold acts to reduce the life to crack initiation and also accelerates crack propagation. Much evidence of creep damage, including grain boundary cavitation, wedge-type cracking and cavitation at MnS inclusions, has been found, being promoted by high strain amplitudes and tensile holds. However, the life is dominated by fatigue mechanisms which seem to ignore the creep-type damage for the straining conditions used here.
U2 - 10.1016/0025-5416(85)90301-5
DO - 10.1016/0025-5416(85)90301-5
M3 - Article
VL - 73
SP - 113
EP - 129
JO - Materials Science and Engineering
JF - Materials Science and Engineering
SN - 0025-5416
ER -