Journal of Welding and Joining

  • 제16권4호
  • /
  • Pages.83-91
  • /
  • 1998
  • /
  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지

용접 계면균열의 크리프 균열성장 거동에 관한 연구

A Study on Creep Crack Growth Behavior of Weld Interface Crack

  • 윤기봉 (중앙대학교 기계공학부) ;
  • 김광웅 (중앙대학교 대학원 기계물성연구실) ;
  • 정용근 (한국중공업 기술연구원)
  • 발행 : 1998.08.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Cracking problems which high temperature plant components suffer during long-term service, occur very often at welded locations. The crack occurs due to accumulated creep damage near fusion line or at heat affected zone (HAZ). However, most of the studies on creep crack growth behavior have been performed with matrix metal not wit welded metal due to the difficulty of interpreting the test results. In this study, creep crack growth rates were measured with C(T) specimens whose cracks were formed along the fusion line or HAZ. The measured crack growth rates were characterized by {TEX}$C_{t}${/TEX}-parameter derived for elastic-primary-secondary creeping material. Since contribution of primary creep was significant for the tested 1Cr-0.5Mo steel, its effect was carefully studied. Effects of crack tip plasticity and material aging were also discussed.

키워드

참고문헌

  1. 대한기계학회지 v.33 no.8 국내 화력발전소의 보일러 및 압력 용기의 현안과제 및 향후대책 김건영
  2. Materials Science Eng. v.A131 Creep Fracture Behavior of 2.25Cr-1Mo Welds from a 31-year-old Fossil Power Plant P. K. Liaw;G. V. Rao;M. G. Burke
  3. ASTM STP 905 Creep Crack Growth under Non-Steady State Condition A. Saxena
  4. ASTM STP 995 Evaluation of the $C_t$ Parameter for Characterizing Creep Crack Growth Rate in the Transient Regime J. L. Bassani;D. E. Hawk;A. Sexena
  5. International Journal of Fracture v.46 Inclusion of Primary Creep in the Estimation of the $C_t$ Parameter C. P. Leung;D. L. McDowell
  6. 저합금강 용접부의 크리프 균열성장거동 모델링 윤기봉;김광웅
  7. ASTM STP 1131 Influence of Crack-Tip Plasticity on Creep-Fatigue Crack Growth, Fracture Mechanics K. B. Yoon;A. Saxena;D. L. McDowell
  8. ASTM Standard, E 1457-92 Standard Test Method for Measurement of Creep Crack Growth Rates in Metals
  9. Materials Research and Standard v.5 no.9 Calibration of the Electric Potential Method for Studying Slow Crack Growth H. H. Johnson
  10. Journal of Testing and Evaluation v.9 no.3 Application of the Electrical Potential Method to Crack Length Measurements Using Johnson's Formula K. H. Schwalbe;D. Hellmann
  11. Eng. Fracture Mechanics v.13 no.4 Electrical Potential Technique For Monitoring Subcritical Crack Growth at Elevated Temperature A. Saxena
  12. 산업안전학회논문집 v.12 no.2 1Cr-0.5Mo 강 용접부 균열의 고온파괴거동 연구 신규인;윤기봉;최현창;박재학;이해무
  13. ASTM STP 791 Unified Solution for J Ranging continously from Pure Bending to Pure Tension H. A. Ernst
  14. International Journal of Fracture v.23 Creep Crack Growth Behavior in 316 Stainless Steel at 594˚C A. Saxena;H. Ernst;J. D. Landes
  15. Technical Report EPRI NP-1931 An Engineering Approach to Elastic-Plastic Analysis V. Kumar;M. D. German;C. F. Shih