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Experimental investigation on static and fatigue behavior of welded sm490a steel under low temperature

  • Ki-Weon Kang
  • Byeong-Choon Goo
  • Jae-Hoon Kim
  • Doo-Kie Kim
  • Jung-Kyu Kim
Article

Abstract

The paper aims to evaluate the fatigue behavior and its probabilistic properties in welded SM490A steels, which is utilized in high speed train, under low temperatures. For the goal, the tensile and fatigue tests are performed under displacement control mode and constant amplitude loading cycles, respectively at various temperatures (293K, 263K and 233K). The static strengths for base and welded materials are increased with the decrease in temperature but, the welded material has a considerable amount of scatter in strength. Also, the fatigue behaviors are greatly influenced by the test temperature for both materials. In particular, the welded material exhibits severe reduction of the fatigue limit compared with the base material. The probabilistic properties of fatigue life are investigated through P-S-N (probabilistic S-N) approach and the predicted results are well in conformance with the experimental results. Also, the variations of fatigue life are greatly influenced by the temperature and this tendency is more remarkable in the welded material.

Keywords

Fatigue Behavior Low Temperature Probabilistic S-N curve Static Behavior Welded SM490A Steel 

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Copyright information

© Korean Society of Steel Construction & Springer 2009

Authors and Affiliations

  • Ki-Weon Kang
    • 1
  • Byeong-Choon Goo
    • 2
  • Jae-Hoon Kim
    • 2
  • Doo-Kie Kim
    • 3
  • Jung-Kyu Kim
    • 4
  1. 1.School of Mechanical and Automobile EngineeringKunsan National UniversityKunsan, JeonbukKorea
  2. 2.Korea Railroad Research InstituteAdvanced Railroad Technologies Application Research CenterGyeonggiKorea
  3. 3.Department of Civil EngineeringKunsan National UniversityKunsan, JeonbukKorea
  4. 4.Department of Mechanical EngineeringHanyang UniversitySeongdong-gu, SeoulKorea

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