| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Microstructure and Fatigue Damage Evolution in Additive-manufactured Metals Using Enhanced Measurement Techniques and Modeling Approaches |
| Author(s) |
Mustafa Mamduh Mustafa Awd, Frank Walther, Ali Fatemi |
| On-Site Speaker (Planned) |
Mustafa Mamduh Mustafa Awd |
| Abstract Scope |
Process-induced microstructures can have a high impact on the fatigue strength of engineering materials. Advanced materials testing builds the base for the design and manufacturing of reliable, high-performance products for various technical applications. Modern analytical and intermittent testing strategies with applied enhanced measurement techniques, i.e., physical instrumentation of testing specimens during loading, allows the characterization of process-structure-property relationships in various fatigue damage stages. In-situ mechanical testing in analytical devices like micro-computed tomography (µ-CT) enables the immediate correlation of material’s reactions with the applied loading conditions. The focus of this study lies in the characterization of fatigue damage evolution and progression before failure depending on environmental as well as material specific microstructural characteristics. Measurement-based fatigue damage tracking during testing of SLM aluminum alloys revealed the interaction between porosity and microstructure under loading in the very high-cycle fatigue (VHCF) regime. The grain boundary strengthening of the microstructure increased VHCF strength by 33%. |
| Proceedings Inclusion? |
Planned: |