|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A Comparison of the Microstructures, Tensile Properties, and Fatigue Crack Growth Mechanisms in Ti-6Al-4V Alloys Fabricated by Three Powder-Based Additive Manufacturing Technologies
||Robert Warren, Yuwei Zhai, Haize Galarraga, Diana Lados, Ryan Dehoff, Michael Kirka, Eric Brown, Gregory Vigilante
|On-Site Speaker (Planned)
There are many additive manufacturing processes that have been used for the fabrication and repair of Ti-6Al-4V components, and it is important to keep in mind that similar alloys produced using various manufacturing methods will exhibit different mechanical properties due to the unique thermal history of each process. This study systematically examined and compared the processing-microstructure-property relationships in Ti-6Al-4V alloys produced using three powder-based additive manufacturing technologies: Laser Engineered Net Shaping (LENS), Laser Powder Bed Fusion (LPB), and Electron Beam Powder Bed Fusion (EBM). The microstructures and tensile properties will be first presented and discussed. Further, the long and small fatigue crack growth behavior for various specimen orientations (with respect to the deposition direction), stress ratios, and heat treatments will be addressed, and crack growth mechanisms at the microstructural scale will be identified. The results will then be reviewed from the perspective of using these materials in high-integrity structural applications.
||Planned: Supplemental Proceedings volume