Abstract
The microstructure evolution during room temperature uniaxial tensile straining of ultrasonic additive manufactured (UAM) zirconium was evaluated using the Advanced Photon Source (APS) facility. Miniature dog-bone tensile specimens of two orientations were cut from a UAM-fabricated zirconium bar for in situ synchrotron tensile tests. Wide-angle X-ray scattering (WAXS) scanning was used to unveil the changes in microstructure of the entire gauge regions throughout the straining. A series of WAXS data analysis methods were utilized to quantify both elastic and plastic deformation mechanisms within the strained specimens. Stress concentrations were identified during early stages of plastic deformation, which become candidate necking positions and eventually lead to failure. Fracture surface analysis implied that these stress concentration locations may be correlated to the fabrication defects, providing insightful guidance for future improvements of the UAM zirconium fabrication process.
Original language | English |
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Article number | 153843 |
Journal | Journal of Nuclear Materials |
Volume | 568 |
DOIs | |
State | Published - Sep 2022 |
Funding
This work was sponsored by the U.S. Department of Energy, Office of Nonproliferation Research and Development in the U.S. National Nuclear Security Administration Office of defense Nuclear Nonproliferation under Contract DE-AC02–06CH11357. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility, operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02–06CH11357. The samples investigated in this study were provided by Oak Ridge National Laboratory.
Keywords
- Microstructure
- Synchrotron
- Ultrasonic additive manufacturing
- Wide-angle X-ray scattering