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Evaluation of Welding Residual Stresses in Power Plant Facilities by Using a Newly Developed Indentation Technique

[+] Author Affiliations
Jae-il Jang, Dongil Son, Yeol Choi, Yun-Hee Lee, Won-Jae Ji, Dongil Kwon

Seoul National University, Seoul, Korea

Sang-Ki Park

Korea Electric Power Research Institute, Daejon, Korea

Paper No. OMAE2002-28281, pp. 249-254; 6 pages
doi:10.1115/OMAE2002-28281
From:
  • ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
  • 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 3
  • Oslo, Norway, June 23–28, 2002
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3613-4 | eISBN: 0-7918-3599-5
  • Copyright © 2002 by ASME

abstract

It is well known that residual stress is one of the important problems in welding design/fabrications and sound maintenance of welded structures. Thus, the demand for quantitative evaluation of welding residual stress has been increased. However, conventional non-destructive techniques for welding residual stress measurement have many difficulties in in-field applications according to poor repeatability, large scatter of obtained data, complex procedures, inaccurate results, and etc. To overcome these difficulties, a newly developed indentation technique was proposed in this study, and applied to evaluate the welding residual stress in electric power plant facilities. By comparing with the stress values obtained from the destructive saw-cutting test, it could be concluded that the new indentation technique is very useful for quantitative/non-destructive evaluation of welding residual stresses in industrial fields such as power plant facilities.

Copyright © 2002 by ASME

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