J. Mater. Sci. Technol. ›› 2025, Vol. 220: 276-289.DOI: 10.1016/j.jmst.2024.09.022

• Research Article • Previous Articles     Next Articles

Evolution of fretting wear behavior of zirconium alloy cladding tube under gross slip regime in simulated primary water of pressurized water reactor

Yusheng Zhanga, Hongliang Minga,*, Shuji Wanga,b, Bin Wua, Jianqiu Wanga,c,*, En-Hou Hanc   

  1. aCAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
    bSchool of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;
    cInstitute of Corrosion Science and Technology, Guangzhou 510530, China
  • Received:2024-07-05 Revised:2024-09-06 Accepted:2024-09-09 Published:2025-06-10 Online:2025-06-17
  • Contact: *E-mail addresses: hlming12s@imr.ac.cn (H. Ming), wangjianqiu@imr.ac.cn (J. Wang) .

Abstract: The evolution of fretting wear behavior of zirconium alloy cladding tubes mated with dimples under the gross slip regime (GSR) was investigated. The findings revealed that the primary wear mechanisms under GSR were delamination, surface fatigue wear and abrasive wear, and the fretting damage rate mainly depends on delamination. The cross-sectional microstructure of the worn area could be divided into the third-body layer, tribologically transformed structure layer, and general deformation layer, with their formation mechanisms analyzed. Furthermore, the mechanism of wear-induced grain refinement was identified as dynamic recrystallization (DRX), including both continuous DRX and discontinuous DRX. Additionally, the processes of fretting wear and DRX were discussed.

Key words: Grid-to-rod fretting, Gross slip regime, Zirconium alloy tube, Microstructural evolution, Dynamic recrystallization