About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
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Presentation Title |
Plastic Strain Visualization and Analysis of Laser Processed Nickel Single Crystals and Polycrystalline 316L |
Author(s) |
Andrew J. Birnbaum, Athanasios Iliopoulos, Anna Rawlings, John Steuben, John Michopoulos |
On-Site Speaker (Planned) |
Andrew J. Birnbaum |
Abstract Scope |
The capability to characterize the mechanical response of material that has undergone laser processing is particularly relevant within the context of laser-based additive manufacturing. While there have been many efforts directed toward elastic residual field measurements, the extent of plastic deformation presents significant experimental challenges. Some efforts have focused on measuring process-induced distortion, though this only gives a global sense of geometric deviation (displacements) from the desired final form. Using a novel, data-driven approach, the present effort seeks to offer direct insight into the extent of plastic strain in ultra-high purity nickel single crystals and 316L polycrystalline materials subjected to melt-mediated laser processing. Electron backscatter diffraction-enabled orientation measurements combined with direct strain imaging techniques enabled the identification of specific slip system activation as well as surface strain measurement. These data are used as the basis of anisotropic finite element simulations of the resulting three-dimensional stress and strain states. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |