About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
|
Presentation Title |
Assessment of Fatigue Evolution and Damage Tolerance in Additive Manufactured Metals |
Author(s) |
Mustafa Awd, Daniel Kotzem, Felix Stern, Mirko Teschke, Jochen Tenkamp, Frank Walther |
On-Site Speaker (Planned) |
Frank Walther |
Abstract Scope |
The microstructure, defects and roughness in additive manufacturing (AM) processes determine the fatigue performance in engineering applications. Modern testing strategies and measurement techniques enable accurate monitoring of the influence of process-induced characteristics on the fatigue behavior. Intermittent fatigue testing revealed the interaction between microstructure, local porosity and fatigue crack initiation until very high cycle fatigue (VHCF) region. For 316L, AlSi, TiAl and Ni alloys, the effect of defects, building direction and stress ratio on fatigue evolution was investigated. The fatigue strength could be correlated with the hardness and the effective defect or pore size relative to load direction using Murakami-Noguchi concept. By elastic-plastic modification by J-integral of Heitmann, the effect of microstructure on cyclic stress-strain behavior and fatigue damage tolerance could be proofed. The studies reveal the potential to enhance the fatigue lifetime and damage tolerance based on comprehensive structure-property relationships to be integrated in uniform fatigue damage tolerance approaches. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Additive Manufacturing |