|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Integrative Materials Design III: Performance and Sustainability
||Microstructure Evolution, Fatigue Crack Growth Mechanisms, and Effects of Heat Treatment in Ti-6Al-4V and Al-10Si-0.4Mg Alloys Fabricated by Laser and Electron Beam Powder Bed Fusion
||Robert Warren, Haize Galarraga, Diana Lados, Ryan Dehoff, Michael Kirka, Ed Hummelt
|On-Site Speaker (Planned)
Laser and Electron Beam Powder Bed Fusion (PBF) are additive manufacturing processes that produce material with unique microstructures and mechanical properties. There is currently a lack of published work regarding the fatigue crack growth (FCG) behavior of PBF manufactured materials; knowledge which is necessary in order for these manufacturing processes to be used for structural applications. In this study, Ti-6Al-4V alloys manufactured using both Laser and Electron Beam PBF processes, as well as an Al-10Si-0.4Mg alloy produced by Laser PBF, have been systematically investigated and compared. The microstructures, tensile, and long and small fatigue crack growth (FCG) properties, for various specimen orientations and heat treatments, have been evaluated and compared. The effects of various heat treatments, initial crack size, and stress ratio on the FCG mechanisms at the microstructural scale of the materials has been determined, and will be discussed from structural design perspective.
||Planned: Supplemental Proceedings volume