The effect of microstructure and environment on fatigue crack growth in 7049 aluminium alloy at negative stress ratios

International Journal of Fatigue

Volumn 25, Issue 9-11, 2003, Pages 1209-1216

  Da Fonte, M ^a   Romeiro, F ^f   De Freitas, M ^b   Stanzl Tschegg, S E ^c   Tschegg, E K ^d   Vasudevan A K ^e  

^a Nautical School   (Portugal)

^b INSTITUTO SUPERIOR TÉCNICO   (Portugal)

^c UNIVERSITY OF NATURAL RESOURCES AND LIFE SCIENCES   (Austria)

^d VIENNA UNIVERSITY OF TECHNOLOGY   (Austria)

^e OFFICE OF NAVAL RESEARCH   (United States)

^f NONE

Author keywords

7049 and 7075 alloys; Crack closure; Fatigue crack growth; Load ratio; Microstructure; Near threshold fatigue; Slip mode

Indexed keywords

ALUMINUM ALLOYS; CRACK PROPAGATION; MICROSTRUCTURE; STRENGTH OF MATERIALS; STRESSES; VACUUM APPLICATIONS;

STRESS RATIOS;

FATIGUE OF MATERIALS;

EID: 0242493472     PISSN: 01421123     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0142-1123(03)00150-6     Document Type: Conference Paper

References (22)

1. Hornbogen E., Starke E.A. Theory assisted design of high strength low alloy aluminium (overview). Acta Metall Mater. 4:1991;1-16.
2. Ming Gao, Pao P.S., Wei R.P. Chemical and metallurgical aspects of environmentally assisted fatigue crack growth in Al 7075-T651 alloy. Metall Trans. 19A:1988;1739.
3. Lafarie-Frenot M.C., Gasc C. The influence of age-hardening of fatigue crack propagation behaviour in aluminium alloy in vacuum. Fatigue Fract Eng Mater Struct. 6:1983;329.
4. Suresh S., Vasudévan A.K., Bretz P.E. Mechanism of slow fatigue crack growth in high strength aluminum alloys. Metall Trans A. 15A:1984;369-379.
5. Davidson D., Lankford J. The effects of aluminum alloy microstructure on fatigue crack growth. Metall Sci Eng. 74:1985;189-199.
6. Vasudévan A.K., Suresh S. Influence of corrosion deposits on near threshold fatigue crack growth behaviour in 2xxx and 7xxx series aluminum alloys. Metall Trans A. 13A:1982;2271-2280.
7. Petit J., Zeghloul A. Backlund J., Blom A., Beevers C.J. Fatigue thresholds. 1982;563 EMAS Ltd, Warley, UK.
8. Tschegg-Stanzl S.E., Plasser O., Tschegg E.K., Vasudévan A.K. Influence and micro-structure and load ratio on fatigue threshold behavior in 7075 aluminum alloy. Int J Fatigue. 21:1999;S255-S262.
9. Fonte M.A., Tschegg-Stanzl S.E., Holper B., Tschegg E.K., Vasudevan A.K. The microstructure and environment influence on fatigue crack growth in 7049 aluminum alloy at different load ratios. Int J Fatigue. 23:2001;S311-317.
10. Kirby B.R., Beevers C.J. Slow fatigue crack growth and threshold behaviour in air and vacuum of commercial aluminium alloys. Fatigue Fract Eng Mater Struct. 1:1979;203-216.
11. Lin F.S., Stark E.A. Jr. Thompson A.W., Bernstein I.M. Hydrogen in metals. TMS-AIME. 1981;485 TMS-AIME, Warrendale (PA).
12. Elber W. The significance of fatigue crack closure. Damage tolerance in aircraft structures. ASTM STP 486. 1971;230-242 ASTM, Philadelphia (PA).
13. Ranganathan N., Bouchet B., Pettit J. Masters J.E., Au J.J. Fractographic aspects of the effect of environment on the fatigue crack propagation in high-strength aluminum alloy. ASTM STP 948. 1987;424 ASTM, Philadelphia (PA).
14. Vasudévan A.K., Sadananda K., Louat N. A review of crack closure, fatigue crack threshold related phenomena. Mater Sci Eng. A188:1994;1-22.
15. Lang M., Marci G. Reflecting on the mechanical driving force for fatigue crack propagation. Panontin T.L., Sheppard S.D. Fatigue and fracture mechanics. ASTM STP 1332. vol. 29:1998;ASTM, Philadelphia (PA).
16. Sadananda K., Vasudévan A.K., Louat N. Critical evaluation of crack closure and related phenomena: I, II. Bailon J.-P., Dickson J.L. Fatigue'93. Proceedings of the Fifth International Conference on Fatigue and Fatigue Thresholds :1993;565-576 EMAS, Warley, UK.
17. Sadananda K., Vasudévan A.K. Analysis of fatigue crack closure and thresholds. Erdogan F. Fracture mechanics. ASTM STP 1220. vol. 25:1993;484-501 ASTM, Philadelphia (PA).
18. Romeiro F., Domingos C., Freitas M. Measurement of fatigue crack closure for negative stress ratios. McClung R.C., Newman J.C. Jr. ASTM STP 1343. vol. II:1999;321-336 ASTM, Philadelphia (PA).
19. Irving P.E., Beevers C.J. Metall Trans. 5A:1974;391-398.
20. Cook R.J., Irving P.E., Booth G.S., Beevers C.J. Eng Fract Mech. 7:1975;69-77.
21. Tschegg-Stanzl S.E., Mayer H.R., Tschegg E.K. The influence of air humidity on threshold fatigue crack growth of 2924-T3 aluminum alloy. Mater Sci Eng. A147:1991;45-54.
22. Holper B., Mayer H., Vasudévan A.K., Tschegg-Stanzl S.E. Near threshold fatigue crack growth in aluminium alloys at low and ultrasonic frequency: influences of specimen thickness, strain rate, slip behaviour and air humidity. Int J Fatigue. 25:2003;397-411.