|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture III
||The Relationship of Processing Parameters to Surface Roughness and Fatigue Life in Additive Manufacturing
||Joy Gockel, Luke Sheridan, Bo Whip, Eric Tatman, Brittanie Koerper
|On-Site Speaker (Planned)
Reliable performance of material fabricated using additive manufacturing (AM) requires an understanding of the processing-structure-property-performance (PSPP) relationship. Fatigue behavior in AM metals is largely driven by defects in the material such as porosity and surface roughness. This work investigates the PSPP relationship for varied contour processing parameters (power and speed) resulting in different surface roughness features for alloy 718 fabricated using the laser powder bed fusion AM process. Extensive nondestructive and destructive characterization methods for multiple geometries are used to determine the relationships between contour parameters and surface roughness characteristics. Characterization techniques and metrics required for an accurate representation of the AM surface will be discussed. Axial fatigue testing is performed to connect the entire PSPP relationship. Understanding of the PSPP relationship for the effect of surface roughness on fatigue life can be used to guide future process parameter optimization and to inform the qualification strategy for AM components.
||Planned: Supplemental Proceedings volume