A mechanical proprties and fatigue life of aluminum alloy sheets for autobodies

자동차 차체용 알루미늄 합금 판재의 기계적특성과 부식피로수명

  • 박인덕 (부경대학교 대학원) ;
  • 윤옥남 (㈜유니슨산업) ;
  • 남기우 (부경대학교 재료공학과)
  • Published : 1997.05.01


The objetive of this study is to compare the mechanical proprties of 6000 series Al-Mg-Si aluminum alloy (AC120) with 5000 series Al-Mg aluminum alloy (TG25), and to investigate the influence of corrosion solution for fatigue life. Comparing of TG25 and AC120 alloy sheets, TG25 alloy sheets showing higher plastic ratio and total elongation have better formability than AC120 alloy sheets. The hardness of nugget area was a little higher than that of base metal area. Also, grain coarsening was observed in HAZ(Heat Affected Zone). In a corrosion fatigue experiment, the fatigue life decreased as concentration increased, when a dipping time was constant. The life decreased as dippling time increased, when a concentration was constant.


Plastic strain ratio;Work hardening exponent;Mechanical properties;Fatigue;Spot Weld Joint;Fatigue Life;Corrosion solution;Dewpoint corrosion


  1. Sumitomo Light Metal Technical Reports v.32 no.1 Properties of Aluminum Alloy Sheets for Autobodies Yoshida. H;Hirano. S
  2. Bull. of the korean Inst. of Met & Mater v.17 no.1 자동차 차체용 알루미늄 합금박판에 대한 관련 기술의 현황과 전망 강석봉;임차용
  3. Bull. of the korean Inst. of Met.& Mater v.7 no.1 자동차 차체용 알루미늄 합금 박판에 대한 관련 기술의 현황과 전망 강석봉;임차용
  4. 자동차 경량화 특집, 프레스기술 v.29 no.4 자동차경량화와 프레스가공(II)
  5. 한국해양공학회지 스폿용접된 자동차 차체용 알루미늄 박판의 피로균열진전의 파괴역학적 평가 박인덕;남기우;강석봉
  6. Presentation to Wahington DC, Section of the SAE v.17 Aluminum Structured Vehicles- The Technology, the Weight Saving, the Performance and Value of such Vehicles for Auto Companies and Their Customers Wheeler, M. J.
  7. Proc. of Int. Conf. on Recent Advances in Science and Engineering of Light Metals Ujihara, S
  8. 材料環境學入門 腐食防蝕協會(編)
  9. American Society for Metals v.1 Aluminum H. Y.Hunsicker(ed); K. R. Van Horn(ed)
  10. Press Formabilities of Aluminum Sheets for Autobody Aplication 김영석;김기수;권남철
  11. 住支經金屬會報 v.21 宇野生;馬場義雄
  12. 자동차 경량화 특집 프레스기술 v.29 no.2 알루미늄합금의 성형가공(I)
  13. Sheet Met. Int v.38 Whiteley, R. L.;Wise. D. E.;Blickwede. D. J.