Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Application of Engineering Critical Assessment Method in the Development Stage of Welding Consumables

용접 재료 개발 단계에서 ECA 기법을 통한 재료의 인성 적합성 평가

  • 신용택 (동아대학교 조선해양플랜트공학과) ;
  • 조영주 (조선선재(주) 기술연구소) ;
  • 서대곤 (조선선재(주) 기술연구소)
  • Received : 2016.11.21
  • Accepted : 2016.12.15
  • Published : 2016.12.30
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Abstract

Needs for structural integrity procedure such as BS 7910, the nuclear industry document R6 Rev.4 and the European FITNET procedure are being increased in industry. Especially, BS 7910 allows metallic structures to be assessed on the basis of fracture mechanics analysis rather than strict adherence to design and fabricated codes. This study is to propose the flaw assessment to judge the toughness level of welding consumables at the development stage. The FCA welding consumables with YP 690MPa and CTOD over 0.25 mm have been developed and its allowable weld flaw size considering actually applied environment has been evaluated. Since the estimated allowable defect size is sufficiently detectable in nondestructive testing, the toughness of the developed material is judged to be appropriate and no problem in securing the structural integrity.

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References

  1. BS 7910:2005, Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures, British Standards Institution
  2. R6 Revision 4, Assessment of the Integrity of Structures containing Defects, British Energy Generation Limited
  3. API 579, Recommended Practice for Fitness-For-Service, American Petroleum Institute
  4. FITNET Fitness-for-Service (FFS)-Procedure (Vol. 1), Eds. M. Kocak, S. Webster, J.J. Janosch, R.A. Ainsworth, R. Koers, 2008, ISBN: 978-3-940923-00-4.
  5. FITNET Fitnessfor- Service (FFS) - Annex (Vol. 2), Eds. M. Koçak, I. Hadley, S. Szavai, Y. Tkach, N. Taylor, (2008), ISBN: 978-3-940923-01-1
  6. J. Sharples, P. Gill, L. Wei, S. Bate, Revised Guidance on Residual Stresses in BS7910, Proceedings of the ASME 2011 Pressure Vessels & Piping Division Conference PVP2011 July 17-21, (2011), Baltimore, Maryland, USA, Paper No. PVP2011-57071
  7. S. K. Bate, D. Green and D. J. Buttle, A Review of Residual Stress Distributions in Welded Joints for the Defect Assessment of Offshore Structures, OTH 482, HMSO (1997)
  8. S. H. Jeong, D. H. Park, H.S. Kim, S. B. Shin, T. J. Park, A Study on Reduction of Pre-crack Deviation in CTOD Specimen using Reverse Bending Method, J. of Welding and Joining, 33 (2) (2015), 62-68 (in Korean) https://doi.org/10.5781/JWJ.2015.33.2.62
  9. H. S. Kim, S. B Shin, M. H. Kim, A Study on Con-servatism of Fatigue Crack Growth Parameters in BS7910, Proceeding of KWJS, (2015), 66-66 (in Korean)
  10. B. J. Kang, Y. I. Kim, C. H. Ryu, H. G. Ki, S. G. Park, Y. T. Oh, Flaw Assessment on an Offshore Structure using Engineering Criticality Analysis, Journal of the Society of Naval Architects of Korea, 52 (6) (2015), 435-443 (in Korean) https://doi.org/10.3744/SNAK.2015.52.6.435
  11. NORSOK standard N-004 Rev.2 2004, Design of Steel Structure, Standards Norway
  12. http://www.poscopac.com/eng/sub02/10_02_03.php
  13. DNVGL-RU-SHIP-Pt.2, Ch.2, St2., Metallic materials, (2016)
  14. ASTM E 8/E 8M-11, Standard Test Methods for Tension Testing of Metallic Materials, ASTM international
  15. BS 7448-Part2, Method for Determination of KIC, critical CTOD and Critical J Values of Welds in Metallic Materials, (1997)