Evaluation of post-weld heat treatments applied to FeCrAl alloy weldments
- Univ. of Wisconsin, Madison, WI (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of Wisconsin, Madison, WI (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The nuclear incident at the Fukushima Daiichi nuclear power plant has created a strong push for accident-tolerant fuel cladding to replace current zirconium-based cladding. A current near-term focus on iron-chromium-aluminum (FeCrAl) alloys. Laser-welded FeCrAl samples (C35MN, C37M, and C35M10TC) were subjected to three different post-weld heat treatment regimes: 650°C for 5h, 850°C for 1h, and 850°C for 5h. The samples were then analyzed using optical light microscopy, micro-hardness indentation, and scanning electron microscopy coupled with energy-dispersive spectroscopy and electron backscatter diffraction. The base microstructure of C37M and C35M10TC experienced significant grain coarsening outside the fusion zone due to the applied post-weld heat treatments, whereas Nb-rich precipitation in C35MN limited grain growth compared with the other alloys studied.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; AC05-00OR22725; AC05- 00OR22725
- OSTI ID:
- 1499038
- Alternate ID(s):
- OSTI ID: 1504016; OSTI ID: 1635973
- Report Number(s):
- SAND-2019-2260J; 673027
- Journal Information:
- Journal of Nuclear Materials, Vol. 515, Issue C; ISSN 0022-3115
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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