The Influence of the Small Circular Hole Defect on the Fatigue Crack Propagation Behavior in Aluminum Alloys

알루미늄 합금재의 피로크랙 전파거동에 미치는 미소원공결함

  • 김건호 (군산대학교 동력기계시스템공학) ;
  • 이호연 (군산대학교 일반대학원)
  • Published : 2008.09.30


We carried out fatigue testing with materials of aluminum alloyC7075-T6, 2024-T4) by rotary bending fatigue tester. We investigated fatigue limit, fatigue crack initiation, fatigue crack propagation behavior and possibility of fatigue life prediction to the different small circular hole defect. The summarized result are as follows; Fatigue limit of the smooth specimens were related tensile strength and yield strength. In case of more large applied stress and small circular hole crack defect, the fatigue crack was grown rapidly. The fatigue crack propagation behavior proceed at according to inclusion. Fatigue crack propagation ratio appeared instability and retardation phenomenon in the first half of fatigue life but appeared stability and replied in the latter half. On other hand, this experimental data of the materials are appeared fatigue life predictability.


  1. H.O. Fuchs and R.I. Stephens, 'Metal fatigue in engineering', John Wiley and Sons, inc. pp.1-3, 1980
  2. William D and Callister, Jr, 'Materials Structure and Engineering an Introduction(6th Ed)', John Wiley and Sons, Inc., pp. 347-349, 2003
  3. R. Koterazawa, M. Mori, T. Matsui and D. Shimo, 'Fractographic Study of Fatigue Crack Propagation', Transactions of the ASME, pp. 202-212, 1973
  4. 김정규, 박병훈, 류석현, '7075-T73 알루미늄 합금의 피로균열진전거동 및 지연현상에 미치는 영향, 대한기계학회논문집 제13권 제4호, pp. 670-679, 1989
  5. 송삼홍, 배준수, '두 개의 미소원공결함에서의 피로크랙발생과 전파에 관한 연구', 대한기계학회논문집(A) 제21권 제5호, pp. 842-849, 1997
  6. C. Makabe and D. F. Socie, 'Branching and Propagation Behavior of Fatigue Crack in Pre-cracked Specimen', J. Soc. Mat. Sic. Japan, Vol. 50, No.12, pp. 1329-1334, 2001
  7. C. Makabe and D. F. Socie, T. Sueyoshi and T. Uehara, 'Mechanism of Shear Mode Fatigue Crack Growth in Pure Aluminum', Journal of the Japan Society of Mechanical Engineering(A), Vol. 70, No. 689, pp. 84-92, 2004
  8. 西谷弘信, 森光武則, '小穴付き試験片の回転曲げ試験による龜裂伝播特性評価',日本機械 学会論文集, 第42巻, 第354号. pp.328-334, 1976
  9. 김건호, '저탄소강재(SM45C)의 피로크랙 전파거동에 미치는 결정립 크기의 영향', 박용기관학회지 제26권 제 1호, pp. 76-82, 2002
  10. William D and Callister, Jr, 'Materials Structure and Engineering an Introduction(6th Ed)', John Wiley and Sons, Inc., pp. 370-376, 2003

Cited by

  1. Characteristic of Fatigue Crack Behavior on the Mixed-Mode in Aluminum Alloy 5083-O vol.35, pp.7, 2011,