Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Corrosion Fatigue Characteristics in the Weld of Multi-Pass Welded A106 Gr B Steel Pipe

  • Published : 2004.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

In order to investigate the corrosion fatigue characteristics in the weld of multi-pass welded A 106 Gr B steel pipe, corrosion fatigue tests were performed under the various stress ratios and 3.5 wt% NaCl solution at room temperature. The corrosion fatigue characteristic curves were represented using crack closure concept. The obtained results are as follows : when the load frequency is 1.0 Hz, the crack opening point is transited in the region of $K_{max}$=20∼32 MPaㆍ $m^{1}$2/. In the low stress intensity factor range, the crack opening point is higher than that in air. However, in the high stress intensity factor range, it is lower than that in air. In the cases of 0.1 Hz and 0.01 Hz, the crack opening point gradually decreases to $K_{min}$ with $K_{max}$ increase.rease.

Keywords

References

  1. ASM, 1996, ASM HANDBOOK, pp. 644-653
  2. ASTM, 198, 'Environment Effect on Fatigue Crack Propagation,' ASTM Metals Hand Book, Vol. 8, pp. 403-411
  3. Achilles, R. D. and Bulloch, J. H., 1987, 'The Effect of Frequency and Environment on the Fatigue Crack Growth Behavior of SA508 RPV Steel,' IJPVP, Vol. 30, pp. 171-192 https://doi.org/10.1016/0308-0161(87)90041-X
  4. Bae, D. H. et al., 2002, 'Numerical Analysis of Welding Residual Stress Using Heat Source Models for the Multi-Pass Weldment,' KSME International Journal, Vol. 16, No. 9, pp. 1054-1064
  5. Chung, S. H. et al., 1989, 'Environment Strength Evaluation of Welded Steel Joint in Seawater (Part I:Corrosion Fatigue Crack Growth Behavior for High Cycle),' KSME International Journal, Vol. 3, No. 1, pp. 1-5 https://doi.org/10.1007/BF02945676
  6. Jones, D. A., 1992, 'Principles and Prevention of Corrosion,' Prentice Hall, pp. 364-367
  7. Lim, J. K. and Kim, Y. J., 1997, 'A Study on Properties of Corrosion Fracture Surfaces of GFRP in Synthetic Sea Water,' KSME International Journal, Vol. 11, No. 3, pp. 249-254 https://doi.org/10.1007/BF02946317
  8. Murakami, R. et al.., 1987, 'The Effect of Residual Stress and Corrosion Deposits on Corrosion Fatigue Crack Propagation Rate of Butt Welded Joints in Natural Sea water,' JSME, Vol. 36, pp. 986-991
  9. Shi, Y. W. et al., 1990, 'Effect of Welding Residual Stresses on Fatigue Crack Growth Behavior In Butt Welds of a Pipeline Steel,' Engineering Fracture Mechanics, Vol. 36, No. 6, pp. 893-902 https://doi.org/10.1016/0013-7944(90)90266-J
  10. Todd, J. A. et al., 1997, 'Crack Closure Effects of Fatigue Crack Growth Thresholds and Remaining Life in an HSLA Steel,' JPVT, pp. 37-44