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- Title
Effect of Impact Velocity and Angle on Impact Wear Behavior of Zr-4 Alloy Cladding Tube.
- Authors
Yu, Shi-Jia; Hu, Yong; Liu, Xin; Li, Dong-Xing; He, Li-Ping; Wang, Jun; Cai, Zhen-Bing
- Abstract
In the pressurized water reactor nuclear power plant, 316L SS chips were captured by the support grid and continued to affect the Zr-4 cladding tube, causing the fuel rods to wear and perforate. In this work, a 60° acute angle cone of 316L SS was used to simulate the cyclic impact of debris on a Zr-4 alloy tube with different initial impact velocities and impact angles. Results showed that increasing the initial impact velocity will generate a wear debris accumulation layer with a wear-reducing effect, but also promote the extension and expansion of fatigue cracks, resulting in the delamination of Zr-4 alloy tubes. The inclination of the impact angle increases the energy loss. The energy loss rate of the 45° impact is as high as 69.68%, of which 78% is generated by the impact-sliding stage. The normal force is mainly responsible for the wear removal and plastic deformation of Zr-4 alloy tubes. Tangential forces cause severe cutting in Zr-4 alloys and pushes the resulting wear debris away from the contact surfaces.
- Subjects
PRESSURIZED water reactors; ALLOYS; FATIGUE cracks; TANGENTIAL force; NUCLEAR power plants; ZIRCALOY-2; SLIDING wear
- Publication
Materials (1996-1944), 2022, Vol 15, Issue 18, p6371
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma15186371