Presentation Information
[1G02]On the Hoop Tensile Behavior of Cr-coated Zircaloy-4 Fuel Cladding by Advanced Expansion Due to Compression (A-EDC) Test
*Ziqi WEI1, Bo Li1, John Andrew Kane Perez Jovellana1, Zongda Yang1, Lijuan Cui3, Risheng Qiu4, Sho Kano2, Hiroaki Abe1 (1. the University of Tokyo, 2. QST, 3. Sichuan Univ., 4. Chongqing Univ.)
Keywords:
Accident Tolerant Fuels,Cr coating,Advanced Expansion due to Compression Test,Hoop strength,Crack propagation
The hoop tensile properties of Cr-coated Zircaloy-4 nuclear fuel cladding were investigated using the advanced expansion due to compression (A-EDC) technique. The coating layers were deposited on Zircaloy-4 substrate through pulsed laser deposition (PLD). Mechanical testing was performed at RT, 573K, 673K and 773K. Nano-indentation measurements and X-ray diffraction analysis were employed to characterize the coating's elastic modulus and residual stress, respectively. The coating's failure mechanism was quantitatively assessed by examining the relationship between local strain and surface crack density. The findings revealed that the thin nanocrystalline/amorphous Cr coating exhibited enhanced resistance to crack formation and propagation.