|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A Highly Fracture and Fatigue Resistant Optimized As-deposited EBM Ti-6Al-4V
||Mohsen Seifi, Jesse Boyer, William Brindley, John J Lewandowski
|On-Site Speaker (Planned)
The fatigue behavior and damage tolerance of additively manufactured (AM) materials must be assessed and understood in order to utilize them in structural applications. Titanium alloys are of particular interest to the aerospace and biomedical community. While microstructure evaluations and quasi-static tensile properties of EBM Ti-6Al-4V have been reported, fracture toughness and fatigue crack growth properties are not widely available. In this work, an optimized EBM-processed Ti-6Al-4V has been examined in the as-deposited and post-processed Hot Isostatic Pressed (HIP) conditions. The fracture toughness properties were measured in vertical and horizontal directions using a J-based fracture mechanics approach. A very high fracture toughness with some cases of an extended R-curve were obtained before any post-processing. As-deposited fracture and fatigue properties exceeded conventional cast material and approached/exceeded wrought properties. X-ray Tomography studies revealed some level of porosity while optimized HIPping and quenching demonstrated defect elimination and improvement of properties.
||Planned: Supplemental Proceedings volume