| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7169710 | Engineering Fracture Mechanics | 2015 | 18 Pages |
Abstract
Fatigue life tests on smooth and pre-pitted specimens and near threshold fatigue crack growth rate measurements are performed on 17-4PH steam turbine blade steel. The influence of environment and stress ratio is investigated. A decrease in the fatigue life and a slowdown of the crack growth rate in the near threshold regime is found in salt solution compared to air. The latter can be explained by oxide-induced crack closure. The critical stresses for fatigue failure in the presence of corrosion pits can be calculated using a methodology that was already successfully applied to 12% Cr steam turbine blade steel.
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Bernd M. Schönbauer, Stefanie E. Stanzl-Tschegg, Andrea Perlega, Ronald N. Salzman, Neville F. Rieger, Alan Turnbull, Shengqi Zhou, Mikolaj Lukaszewicz, David Gandy,