|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||I-8: Investigating Internal Lattice Strains in DMLS IN718 Material in the as Built and Post-processed Conditions
||Priya Ravi, Diwakar Naragani, John Rotella, Peter Kenesei, Jonathan Almer, Michael Sangid
|On-Site Speaker (Planned)
Additive manufacturing(AM) is a revolutionary technique capable of producing complex geometries in less time. Due to its numerous benefits, it has gained popularity over the past decade. With the associated rapid solidification process, the AM processing technique imposes high levels of local residual stresses in the material. This study investigates residual stresses in the form of lattice strains via high energy x-ray diffraction techniques. Specifically, differences between the as-built(with stress relief heat treatment) and fully post-processed heat treatment(including homogenization, solution annealing, aging) conditions are analyzed. Microstructural variations have been characterized using high energy x-ray techniques, such as powder diffraction and high energy x-ray diffraction microscopy for the two specimens during in-situ loading, respectively. A comparison between the outcomes of the two mechanical tests is made, and the evolution of lattice strains, von Mises stresses, and full width at half maximum of the diffraction peaks with increasing macroscopic strain is shown.
||Planned: Supplemental Proceedings volume