Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1580773 | Materials Science and Engineering: A | 2009 | 6 Pages |
Abstract
High efficiency in gas turbines requires increased gas temperatures. Gas temperatures above 1100 °C can only be handled using air-cooled structures to keep the metal temperatures below 1000 °C. Single-crystalline superalloys meet the requirements for creep strength and thermo-mechanical fatigue resistance. Single-crystalline superalloys are used for gas turbine blades. Modeling of deformation is a key issue in order to develop life prediction tools. In this study modeling of creep deformation and creep rupture as well as fatigue contribute to a description of the mechanical behavior of CMSX-4 at three different temperatures. Creep deformation was described by modified Garofalo equation and a Larson-Miller approach. Cyclic elastic-plastic deformation as well as fatigue life were described by a new engineering approach. Here the elastic-plastic deformation work was considered in order to determine a temperature-dependent master curve for fatigue behavior.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
A. Scholz, Y. Wang, S. Linn, C. Berger, R. Znajda,