Fatigue-crack-propagation thresholds in a nickel-base superalloy at high frequencies and temperatures
Document Type
Article
Publication Date
1-1-2002
Department
Department of Mechanical Engineering-Engineering Mechanics; Department of Materials Science and Engineering
Abstract
Fatigue-crack-propagation (FCP) thresholds in a nickel-base superalloy at high frequencies and temperatures were investigated. Two different heat treatments were investigated, one yielding a relatively coarse grain size of 55 μm and another yielding a fine grain size of 6 μm. Tests were conducted at 100 Hz and 1000 Hz and at load ratios between 0.3 to 0.7. Scanning electron microscopy (SEM) was used to determine quantitative measures of fracture-surface roughness. Results showed that the roughness of the fracture surface increased as the load ratio was increased for both microstructures.
Publication Title
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Recommended Citation
Shyam, A.,
Padula, S.,
Marras, S.,
&
Milligan, W. W.
(2002).
Fatigue-crack-propagation thresholds in a nickel-base superalloy at high frequencies and temperatures.
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,
33(7), 1949-1962.
http://doi.org/10.1007/s11661-002-0028-2
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/5056