Journal of Failure Analysis and Prevention

, Volume 9, Issue 3, pp 227–233 | Cite as

Fracture Analysis on a Cylindrical Shell Section of the Low-Pressure Absorption Tower

Case History---Peer-Reviewed
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Abstract

Cracking of a cylindrical shell section from an absorption tower occurred during the hydraulic pressure testing. In order to find out the cause of failure, the cracked cylindrical shell section was inspected and destructively analyzed. Optical microscopy was performed to evaluate the basic microstructure of the material used to fabricate the cylinder and the effect of welding on the microstructure. The fracture surface was examined in a scanning electron microscope, and the effects of the heat treatment temperature on the structure and properties of 410S/16MnR explosively clad plate were investigated. Detailed metallographic studies indicated that bainite existed in the base layer of the explosively welded material. The weld-induced residual stress in the crack origin was investigated by a three-dimensional (3D) finite element model. The numerical result was consistent with the fracture analysis supporting the conclusion that cracking was caused by the poor mechanical properties of the explosively clad plate and that the poor properties were induced by improper heat treatment after explosive welding. The welding residual stresses also contributed to the failure process.

Keywords

Fracture analysis Bainite Heat treatment Brittle fracture 

References

  1. 1.
    Tang, J.Q., Gong, J.M., Zhang, X.C., Tu, S.T.: Comparison on the cracking susceptibility of different low alloy steel weldments exposed to the environment containing wet H2S. Eng. Fail. Anal. 13(7), 1057–1064 (2006)CrossRefGoogle Scholar
  2. 2.
    Herbsleb, G., Poepperling, R.K., Schwenk, W.: Occurrence and prevention of hydrogen induced stepwise cracking and stress corrosion cracking of low alloy pipeline steels. Corrosion 36(5), 247–256 (1981)Google Scholar
  3. 3.
    Xu, X.L., Yu, Z.W.: Failure analysis of GCr15SiMn steel bearing sleeve. Eng; Fail. Anal. 13(5), 857–865 (2006)CrossRefMathSciNetGoogle Scholar
  4. 4.
    Li, M.S., Xie, X., Wang, L.F., et al.: Numerical simulation of Y-Slit type cracking test. Pressure Vessel Technol. 20(11), 18–20 (2003)Google Scholar
  5. 5.
    Xue, X.L., Sang, Z.F.: Numerical simulation of in-service welding of a pressurized pipeline. J. Pressure Vessel Technol., Trans. ASME 129(1), 66–72 (2007)CrossRefGoogle Scholar
  6. 6.
    Gong, J.M., Jiang, W.C., Tang, J.Q., et al.: 3D finite element simulation of hydrogen diffusion in 16MnR steel weldment. Chin. J. Mech. Eng. 43(9), 113–118 (2007)CrossRefGoogle Scholar
  7. 7.
    Teng, T.L., Lin, C.C.: Effect of welding conditions on residual stresses due to butt welds. Int. J. Pressure Vessels Piping 75(12), 857–864 (1998)CrossRefGoogle Scholar
  8. 8.
    Bang, I.W., Son, Y.P., Oh, K.H., Kim, Y.P., Kim, W.W.: Numerical simulation of sleeve repair welding of in-service gas pipelines. Weld. J. 81(12), 273–282 (2002)Google Scholar
  9. 9.
    Xue, X.L., Sang, Z.F., Jiang, W.Z.: The effect of a discontinuous welding technique on stress levels of a hot tap tee. Proceedings of the Sixth International Pipeline Conference, pp. 1555–1561 (2004)Google Scholar

Copyright information

© ASM International 2009

Authors and Affiliations

  • Gang Ma
    • 1
  • Xiang Ling
    • 1
  • Lijing Zhang
    • 1
  • Xiaoguang Yu
    • 1
  1. 1.School of Mechanical and Power EngineeringNanjing University of TechnologyNanjingChina

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