Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Fracture Toughness Comparison of Weld Metal and Heat-Affected Zone of Brittle Crack Arrest Steel Welding Joint

후물재 용접부의 용착금속과 열영향부의 파괴 인성 비교 연구

  • Choi, Kyung-Shin (Department of Mechanical Design Engineering, Changwon National University) ;
  • Kong, Seok-Hwan (Department of Mechanical Design Engineering, Changwon National University) ;
  • Seol, Sang-Seok (Department of Mechanical Design Engineering, Changwon National University) ;
  • Chung, Won-Jee (Department of Mechanical Design Engineering, Changwon National University)
  • 최경신 (국립창원대학교 기계공학부) ;
  • 공석환 (국립창원대학교 기계공학부) ;
  • 설상석 (국립창원대학교 기계공학부) ;
  • 정원지 (국립창원대학교 기계공학부)
  • Received : 2021.04.05
  • Accepted : 2021.05.14
  • Published : 2021.07.31
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Abstract

Even welds that have passed non-destructive testing in the case of brittle crack arrest steel materials will actually have very fine weld defects. Based on studies showing that these defects adversely affect the structure if subjected to a certain period of load, the following conclusions were obtained by conducting CTOD tests on welding joints of high-strength BCA materials, structures comprising the upper decks of a large container vessel. First of all, the fatigue pre-cracking in the weld metal and heat affected areas was tested and the behavior was identified. Both parts of the welding joint are allowable range for the class regulations. In addition, CTOD results showed that the CTOD value in the heat affected area was more than 0.5 times higher than in the weld metal area.

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References

  1. Shin, Y. T., Kang, S. W., Kim, M. H., "Evaluation of Fracture Toughness and Microstructure on FCA Weldment According to Heat Input," Journal of Welding and Joining, Vo1. 26, No. 3, pp. 51-60, 2008. https://doi.org/10.5781/KWJS.2008.26.3.051
  2. Glover, A. G. McGrath, J. T. Tinkler, M. J. and Weatherly, G. C., "The Influence of Cooling Rate and Composition on Weld Metal Microstructures in a C/Mn and a HSLA steel," Welding Journal, Vol. 56, No. 9, pp. 267-273, 1977.
  3. Smith, N. J. Mcgrath, J. T. Gianetto, J.A. and Orr, R .F., "Microstructure/Mechanical Property Relationship of Submerged Arc Welds in HSLA 80 Steel," Welding Journal, Vol. 68, No. 3, pp. 112-120, 1989.
  4. McGrath, J. T. and Gianetto, J. A., "Some Factors Affecting the Notch Toughness Properties of High Strength HY80 Weldments," The Canadian Journal of Metallurgy and Materials Science, Vol. 25, No. 4, pp. 349-356, 1986.
  5. Evans, G. M., "The Effect of Nickel on Microstructure and Properties of C-Mn all Weld Metal Deposits," Welding Research Abroad, Vol. 1, No. 1, pp. 2-13, 1991.
  6. Zhang, Z. and Farrar, R. A., "Influence of Mn and Ni on the Microstructure and Toughness of C-Mn-Ni Weld Metals," Welding Journal, Vol. 76, No. 5, pp. 183-196, 1997.
  7. Dallam, C. B. Liu, S. and Olson, D. L., "Flux Composition Dependence of Microstructure and Toughness of Submerged Arc HSLA Weldment," Welding Journal, Vol. 64, No. 5, pp. 140-151, 1985.
  8. BS7448: Part 2 : 1997, "Fracture Mechanics Toughness Tests, Part 2. Method for the Determination of KIC, Critical CTOD and Critical J Values of Welding in Metallic Materials," (British Standard)