Modeling of mechanical properties of alloy CMSX-4
| Autor: | Stefan Linn, Radim Znajda, Yanxue Wang, Alfred Scholz, Christina Berger |
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| Rok vydání: | 2009 |
| Předmět: |
Work (thermodynamics)
Materials science Turbine blade Mechanical Engineering Metallurgy Alloy Deformation (meteorology) Strain rate engineering.material Condensed Matter Physics Fatigue limit law.invention Superalloy Creep Mechanics of Materials law engineering General Materials Science Composite material |
| Zdroj: | Materials Science and Engineering: A. :278-283 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2008.04.103 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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