|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Integrative Materials Design III: Performance and Sustainability
||Experimental and Computational Studies of Fatigue Crack Propagation in Cast Al-Si Alloys Containing Secondary Phases
||Tiantian Zhang, Anthony Spangenberger, Diana Lados
|On-Site Speaker (Planned)
Material-centric design necessitates a mechanistic understanding of the material’s performance under in-service conditions. Fatigue crack growth plays an important role in damage tolerant design where crack tip plasticity and its effects on crack propagation require physics-based computational modeling in conjunction with experimental validation. Crack tip plasticity in a hypoeutectic Al-Si cast alloy (A356) was captured using digital image correlation (DIC), and its interactions with the microstructure were studied. The strain distribution was influenced by both location relative to the crack path and distinct microstructural features. Microstructure-scale computational models using the extended finite element method were developed in parallel by incorporating cumulative damage models and secondary phase (eutectic Si particles) failure mechanisms. Simulations indicate agreement with geometric strain localizations measured using DIC, and highlight the utility of computational materials assessment for high-integrity fatigue-critical applications.
||Planned: Supplemental Proceedings volume