Improving fatigue performance of Cr-coated zirconium alloy cladding by ultrasonic shot-peening proces

Yong-jing Wang; Si-gong Li; Yang Liu; Zhi-jia Zhang; Rui-xuan Feng; Qu-ge Wang; Qian-cheng Zhang

Journal of Materials Research and Technology (Nov 2023)

Improving fatigue performance of Cr-coated zirconium alloy cladding by ultrasonic shot-peening proces

Yong-jing Wang,
Si-gong Li,
Yang Liu,
Zhi-jia Zhang,
Rui-xuan Feng,
Qu-ge Wang,
Qian-cheng Zhang

Affiliations

Yong-jing Wang: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, PR China
Si-gong Li: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, PR China; China Nuclear Power Technology Research Institute, Shenzhen, 518026, PR China
Yang Liu: China Nuclear Power Technology Research Institute, Shenzhen, 518026, PR China
Zhi-jia Zhang: State Key Laboratory for Mechanical Structure Strength and Vibration, Xi'an Jiaotong University, Xi'an, 710049, PR China; Corresponding author.
Rui-xuan Feng: State Key Laboratory for Mechanical Structure Strength and Vibration, Xi'an Jiaotong University, Xi'an, 710049, PR China
Qu-ge Wang: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, PR China
Qian-cheng Zhang: State Key Laboratory for Mechanical Structure Strength and Vibration, Xi'an Jiaotong University, Xi'an, 710049, PR China

Journal volume & issue: Vol. 27
pp. 6047 – 6057

Abstract

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In this paper, Cr-coated zirconium fuel claddings were treated with ultrasonic shot-peening process (USPP). The mechanism of improving fatigue performance of Cr-coated zirconium fuel cladding was investigated by low cycle fatigue experiment. It was shown that USPP effectively improved fatigue life of Cr-coated zirconium fuel cladding under different temperatures. The enhancement mechanism is that USPP treatment changes the surface topography, increases in residual compressive stress and decreases surface roughness of the Cr coating. The fracture cross-section of tested specimens show that the Cr coating has little plastic deformation, showing brittle fracture characteristics. In addition, compared to the large amount of cracking inside the original Cr coating, the integrity of the USPP-Cr coating is better. The USPP-Cr coating has fewer cracks penetrating into the substrate, indicating that the Cr coating with USPP treatment has excellent fatigue crack resistance.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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