|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Quantitative Effects of Texture and Grain Size on Short Fatigue Crack Growth in High Strength Al Alloys by a 3D Microstructural-based Model (Note: This presentation will also appear in the poster session.)
||Pei Cai, Tongguang Zhai, Yan Jin, Wei Wen
|On-Site Speaker (Planned)
A 3D microstructure-based model was developed to quantify growth behaviors of short fatigue cracks by considering both driving force and local resistance in high strength aluminum alloys. The twist angle was the key parameter controlling the resistance of a grain boundary to short crack growth across the boundary. The model was capable of providing statistical prediction of short fatigue crack growth behaviors in different textures and grain sizes. It was found that there were two characteristic peaks in the simulated life spectrum in alloys with all the textures studied, and that the shorter-life peak was always associated with situations where a small twist angle occurred at the first grain boundary that the short crack encountered, while the longer-life peak was related to a larger twist angle at the very first grain boundary. The growth life of a short crack could be quantitatively related to the grain size in the alloys.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)