|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||In-situ Synchrotron X-ray Diffraction Measurements of Mechanical Properties, Phase Transformation, and Strain Pole Figures of Additively Produced 17-4 Stainless Steel by Laser Powder Bed Fusion.
||Thien Q. Phan, Darren C. Pagan
|On-Site Speaker (Planned)
||Thien Q. Phan
Additively manufactured (AM) 17-4 stainless steel exhibits significant differences in microstructure and mechanical properties in comparison to typical commercial 17-4. In this study, synchrotron X-ray measurements performed at the F2 station of the Cornell High Energy Synchrotron Source (CHESS) were used to investigate the mechanical response of stress-relieved AM 17-4. AM samples were produced via laser powder bed fusion at the manufacturer’s recommended power/speed settings followed by a stress-relief heat treatment. During the uniaxial tension tests, far field X-ray diffraction images were used to evaluate microstructural texture, phase-specific load partitioning, and orientation dependence of lattice strain across the separate phases. Simultaneously, X-ray computed micro-tomography was used to track the evolution of porosity at various macroscopic strain levels. Using these data, the development of damage in the deforming AM 17-4 is analyzed in comparison to the evolution of microstructure and redistribution of load in the specimen during plastic deformation.
||Planned: Supplemental Proceedings volume