About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
Presentation Title |
Fatigue Crack Growth in Structural Cast Aluminum Alloys: Microstructural Mechanisms, Modeling Strategies, and Integrated Design |
Author(s) |
Anthony G. Spangenberger, Diana Lados |
On-Site Speaker (Planned) |
Anthony G. Spangenberger |
Abstract Scope |
Advanced design for fatigue crack growth (FCG) resistance requires development and integration of phenomenological models across a range of size scales and mechanistic regimes. To address this need, numerical and computational models of small and long FCG have been developed for materials having a ductile matrix and brittle reinforcing phases, and are supported by experimental testing of cast A356 aluminum alloy. A combined physical/statistical predictive model of microstructurally small crack growth has been developed on the basis of transforming long FCG data using easily measured microstructural parameters for secondary phase-controlled behavior. Complementary to this, an extended finite element model of microstructurally-based small and long FCG was developed as part of a through-process approach to component development and material selection for enhanced structural integrity. Both models are validated by conventional FCG testing, and supported by novel characterization methods for properties at the microstructure scale. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |