|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||High-throughput Fatigue Experiments for Early Damage Evolution and Lifetime Prediction
||Thomas Straub, Michael Buck, Ali Riza Durmaz, Chris Eberl
|On-Site Speaker (Planned)
A material’s fatigue lifetime is determined by the crack formation process: damage accumulation in individual grains, micro crack initiation, short crack formation. In the past years (TMS2016 poster session 3rd price, TMS2017 presentation) the implementation of a novel high-throughput methodology for fatigue damage evolution investigation has been presented. This has been achieved by sample size reduction and implementation of a sensitive measurement setup, where the sample resonant frequency decrease correlates to damage initiation. This methodology gives in-situ insights of the damage evolution distribution in individual grains and neighbors, depending on the number of cycles, the local stress amplitude, and the grain orientation. This contribution will present fatigue results and damage initiation of bcc samples; as well as how the methodology can estimate parameters (such as slip band width or spacing and cyclic irreversibilities) for life time prediction, for example Microstructure-Based Fatigue-Crack-Initiation Model (Chan 2003).
||Planned: Supplemental Proceedings volume