|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||Fatigue Crack Growth Rate of Electron Beam Melted (EBM) Titanium Alloy (Ti-6Al-4V): Effect of Crystallographic Texture and Internal Porosity
||Nik Hrabe, Jake Benzing, Nick Derimow, Tim Quinn, Jolene Splett, Lucas Koepke
|On-Site Speaker (Planned)
The effects of crystallographic texture and internal pores on ASTM E647 fatigue crack growth rate (R = 0.1) of EBM Ti-6Al-4V were investigated by studying material in the as-built and HIPed conditions as well as in two orthogonal crack growth directions with respect to the build direction. HIPing sufficiently reduced porosity (x-ray CT), and unexpected texture variation (EBSD) was observed for this material (i.e. NOT <100>β-fiber in the build direction). Significant effect on threshold behavior and the onset of unstable crack growth was observed due to internal porosity and texture variation.