|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Microstructure Evolution, Tensile Properties, and Fatigue Crack Growth Mechanisms in Ti-6Al-4V Alloys Fabricated by Electron Beam Melting
||Haize Galarraga, Diana Lados, Ryan R Dehoff, Michael M Kirka
|On-Site Speaker (Planned)
Additive Manufacturing (AM) is capable of building 3D near-net-shaped functional parts directly from computer models using unit materials, powder or wire. Electron Beam Melting (EBM) is an AM process that selectively fuses powder particles on a powder bed using electron beam as a power source. EBM leads to unique microstructures and mechanical properties related to its specific processing thermal history. In this study, Ti-6Al-4V alloys fabricated by EBM have been systematically investigated. Resulting microstructures and room temperature tensile and fatigue crack growth (FCG) properties were evaluated and compared in different orientations with respect to the deposition direction. The effects of heat treatment, initial crack size, and stress ratio on the FCG mechanisms at the microstructural scale of the materials have been determined and will be discussed from structural design perspective. Original computational modeling work for predicting temperature evolution during processing and microstructure development will also be presented and discussed.
||Planned: A print-only volume