|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Late News Posters
||PP-24: Optimization of Welding Techniques on Accident Tolerant Alloys for Nuclear Reactor Applications
||Emmanuel Perez, Nathan Jerred, Jian Gan
|On-Site Speaker (Planned)
New cladding materials for nuclear light water reactor (LWR) fuels with improved failure resistance in accident scenarios are under development. One potential class of alloys, FeCrAl alloys, can offer improved properties over current LWR Zircaloy claddings. Because FeCrAl alloys have higher thermal neutron absorption than zircaloy, thinner walled FeCrAl claddings (250-350μm) must be utilized to present a feasible alternative. Techniques to weld these thin-walled claddings to end-plugs are considered. Traditional welding techniques result in a significant loss of the optimal microstructures in both the weld and heat affected zones. Laser beam welding and pressure resistance welding show promising results and are the focus of this work. Parametric studies have been performed with X-ray computed tomography, to optimize the weld microstructure and mechanical properties. Characterization of the weld microstructures has been carried out by optical and backscatter electron diffraction. The mechanical properties have been analyzed through micro-indentation and tensile testing.