|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Quasi In Situ Investigation of Microstructure Evolution in Additively Manufactured Layers
||Maria Strantza, Bjorn Clausen, John S. Carpenter, Jason C. Cooley, Donald W. Brown
|On-Site Speaker (Planned)
During the additive manufacturing (AM) process high thermal gradients and rapid cooling rates result in unique metastable microstructures. As a result, parameters such as residual stresses and in general microstructural variations need to be well-understood in order to control their impact on the mechanical response of the AM materials. In this work, we use high-energy x-ray diffraction in order to capture microstructural evolution within a single and successive multiple layers of AM material. Our objective is to characterize and understand the redistribution of the microstructure after the solidification of each layer. The results indicate that the phase fractions are controlled by the cooling rates and the subsequent layers. This is particularly important for local crack growth behavior in fatigue and promising for the development of theoretical models of the AM process.
||Planned: Supplemental Proceedings volume