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Time and temperature dependent cyclic plasticity and fatigue crack growth of the nickel-base Alloy617B

Experiments and models
: Maier, G.; Riedel, H.; Seifert, T.; Klöwer, J.; Mohrmann, R.


Heilmaier, M.:
Euro Superalloys 2010. Selected, peer reviewed papers from the First European Symposium on Superalloys and their Applications : 25 - 28 May, 2010, Wildbach Kreuth (Germany)
Dürnten: Trans Tech Publications, 2011 (Advanced materials research 278)
ISBN: 978-3-03-785113-5
European Symposium on Superalloys and their Applications (Euro Superalloys) <1, 2010, Wildbad Kreuth>
Fraunhofer IWM ()

Isothermal low cycle fatigue and thermomechanical fatigue tests are performed on Alloy617B in the solution-annealed and stabilized condition at temperatures between room temperature and 900 °C. In addition, the replica technique is applied to study the growth of microcracks. The Chaboche model is found to describe the cyclic viscoplastic behavior of both heats, except the pronounced cyclic hardening in the low-temperature branches of the TMF tests. A lifetime model based on the cyclic crack-tip opening displacement and the cyclic J integral is used to describe the measured lifetimes and crack growth rates. However, the description is not fully consistent, since the data for room temperature and for temperatures above 400 deg;C fall into two separate scatter bands.