Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Evaluation of Hydrides Effects on Corrosion and Tensile Properties of Stress-relieved Zirconium Claddings

응력이완 열처리된 지르코늄 피복관의 부식 및 인장특성에 미치는 수소화물 영향 평가

  • Bang, Je-Geon (Zirconium Cladding Development Team, Korea Atomic Energy Research Institute) ;
  • Baek, Jong Hyuk (Zirconium Cladding Development Team, Korea Atomic Energy Research Institute) ;
  • Lee, Myung Ho (Zirconium Cladding Development Team, Korea Atomic Energy Research Institute) ;
  • Jeong, Yong Hwan (Zirconium Cladding Development Team, Korea Atomic Energy Research Institute)
  • 방제건 (지르코늄피복관개발팀, 한국원자력연구소) ;
  • 백종혁 (지르코늄피복관개발팀, 한국원자력연구소) ;
  • 이명호 (지르코늄피복관개발팀, 한국원자력연구소) ;
  • 정용환 (지르코늄피복관개발팀, 한국원자력연구소)
  • Received : 2004.10.25
  • Accepted : 2004.11.15
  • Published : 2004.11.30
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Abstract

The hydrides in cladding affect the corrosion and tensile properties. In this study corrosion and tensile properties were evaluated with varying the hydrogen concentration. The charged hydrogen contents were ranged from 200 to 1000 ppm. The corrosion rate in water and LiOH solution increases with the hydrogen concentration. The hydride did not affect the corrosion mechanism in the pre-transition region, but in the post-transition region the corrosion rate was accelerated. Cladding E contained higher Niobium content was slowly accelerated compared with other claddings. The yield and ultimate strengths were independent on the hydrogen content. However, the total elongation decreased gradually with increasing the hydrogen content. SEM observation of fracture surface showed that an average of depth of voids decreased with increasing the hydrogen content and small secondary crack are observed.

Keywords

Acknowledgement

Supported by : 과학기술부

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