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Comparison of Fretting Wear Characteristics of Zircaloy-4 Tube in Light Water and in Air

지르칼로이-4 튜브 프레팅 마멸 특성의 환경 의존성과 마멸기구

  • 조광희 (경북대학교 기계공학과 대학원) ;
  • 김석삼 (경북대학교 기계공학부)
  • Published : 1999.03.01

Abstract

The fretting wear behaviour of Zircaloy-4 tube used as the fuel rod cladding in PWR nuclear power plants has been investigated at the different test environment, in light water and in air as a function of slip amplitude, normal load, test duration and frequency. Zircaloy-4 tubes were used for both of oscillating and stationary specimens. A fretting wear tester was designed to be suitable for this fretting test. The wear volume and specific wear rate of Zircaloy-4 tube in water was greater than those in air under various slip amplitude. Delaminates and surface cracks were observed at low slip amplitude and high load of fretting test in water, but the traces of adhesion and plowing were observed at and above 200 Um. The water accelerates the wear of Zircaloy-4 tube at lower slip amplitude in fretting.

Keywords

References

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