Journal of Welding and Joining

  • 제33권4호
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  • Pages.50-56
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  • 2015
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  • 2466-2232(pISSN)
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  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
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고장력강판 적용 샤시부품의 용접부 내구수명 향상기술 개발

Development of Durability Enhancement Technology for Arc Weldings in Advanced High Strength Steel (AHSS) Chassis Parts

  • 이광복 (현대자동차 연구개발본부 재료개발센터 자동차강판개발TFT) ;
  • 오승택 (현대자동차 연구개발본부 재료개발센터 자동차강판개발TFT)
  • Lee, Kwang Bok (Sheet Metal Development TFT, Research & Development Division, Hyundai Motor Company) ;
  • Oh, Seung Taik (Sheet Metal Development TFT, Research & Development Division, Hyundai Motor Company)
  • 투고 : 2015.08.12
  • 심사 : 2015.08.24
  • 발행 : 2015.08.31
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초록

In general, discontinuity of metallurgical and structural points of weld zone could decline the fatigue strength. For the lightweight trend, the AHSS application in automotive chassis is in-progress. However, there are few research reports on AHSS welds fatigue strength in especially automotive chassis parts. Therefore, in this study, we evaluated the effects of the factors affecting the AHSS welding fatigue strength. As the result, the stress concentration of weld bead is the most important factor for welding fatigue strength. For the enhancement of welding fatigue strength, we focused on reducing the stress concentration of the welding beads. So, we applied and proved the plasma welding process and GTAW (Gas Tungsten Arc Welding) dressing method. It was verified by uniaxial fatigue specimen, fatigue performance increased from 40 to 60% by applying TIG dressing method compared to the conventional GMAW (Gas Metal Arc Welding). These results could be recommended the enhancement of fatigue performance of AHSS.

키워드

참고문헌

  1. Bannantine et al., Fundamentals of metal fatigue analysis, 1990, Prentice Hall
  2. Byeong-Choon Goo, Jai-Hoon Kim, Fatigue Tests of Welded Joints and Comparison Study of Foreign Codes, Journal of KWJS, 25(14-23) (in Korean)
  3. John J.F. Bonnen et al., Durability of Advanced High Strength Steel Gas Metal Arc Welds, SAE International 2009-01-0257
  4. Jae-Won Kim, Yeong-Do Park, Selection of Optimal Welding Conditions for GMAW of High Strength Steel and Characterization of Weldability Change, KWJS 2011-Automn 138 (in Korean)
  5. Chin Hyung Lee et al., Effect of weld geometry on the fatigue life of non-load-carrying fillet welded cruciform joints, 2009, Engineering failure analysis 16, 849-855. https://doi.org/10.1016/j.engfailanal.2008.07.004
  6. Pedersen et al., Comparison of post weld treatment of high strength steel welded joints in medium cycle fatigue, 2001, International Institute of welding XIII-2272-09
  7. Haagensen et al., IIW recommendations on post weld improvement of steel and aluminum structures, 2001, International Institute of Welding XIII
  8. Fatigue behavior of arc welded assemblies-Paths of improvement, 2011, Arcelor Mittal Report
  9. Jai-Hoon Kim, Byeong-Choon Goo, A Study on the Fatigue Life Estimation Using Butt Weld Bead Profiles, 2004, Journal of The Korean Society For Railway 7(2), 125-129 (in Korean)
  10. Stress concentration factors 3rd Ed. 2007, Peterson

피인용 문헌

  1. Effect of Weld Bead Shape on the Fatigue Behavior of GMAW Lap Fillet Joint in GA 590 MPa Steel Sheets vol.7, pp.10, 2017, https://doi.org/10.3390/met7100399
  2. Improvement of fatigue strength of lap fillet joints by using tandem MAG welding in a 590-MPa-grade galvannealed steel sheet vol.93, pp.9-12, 2017, https://doi.org/10.1007/s00170-017-0828-6
  3. Effects of welding current and torch position parameters on bead geometry in cold metal transfer welding vol.32, pp.9, 2018, https://doi.org/10.1007/s12206-018-0831-3
  4. Effect of Porosity on the Fatigue Behavior of Gas Metal Arc Welding Lap Fillet Joint in GA 590 MPa Steel Sheets vol.8, pp.4, 2018, https://doi.org/10.3390/met8040241