Observations of crack path changes caused by periodic underloads in AA7050-T7451

International Journal of Fatigue

Volumn 30, Issue 7, 2008, Pages 1267-1278

  White, Paul ^a   Barter, S A ^a   Molent, L ^a  

^a DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION   (Australia)

Author keywords

Crack closure; Crack paths; Fatigue crack growth; Fractography; Underloads

Indexed keywords

FRACTOGRAPHY; LOAD TESTING; SCANNING ELECTRON MICROSCOPY; STRESS ANALYSIS; SURFACE PHENOMENA;

ACTIVE SLIP SYSTEMS; CONSTANT AMPLITUDES; CRACK PATHS; PERIODIC UNDERLOADS; VARIABLE AMPLITUDES;

FATIGUE CRACK PROPAGATION;

EID: 41549102853     PISSN: 01421123     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ijfatigue.2007.08.021     Document Type: Article

References (28)

1. Wanhill RJH. Damage tolerance engineering property evaluation of aerospace aluminium alloys with emphasis on fatigue crack growth. Technical Report NLR TP 94177U, National Aerospace Laboratory NLR; 1995.
2. van der Linden HH. Modifications of flight-by-flight load sequences to provide for good fracture surface readability. In: Fatigue crack topography. AGARD conference proceedings, vol. 376; 1984.
3. Dainty RV. The use of 'marker-loads' as an aid in quantitative fractography in full-scale aircraft fatigue testing - a case study. Technical Report LTR-ST-1374. National Research Council, Canada; May 1982.
4. Abelkis PR. A study of fatigue crack propagation under spectrum loading through the use of microfractography. In: Fatigue of structures, November 17-20, 1975, New Orleans (LA); 1975.
5. Sunder R., Porter J., and Ashbaugh N.E. The effect of stress ratio on fatigue crack growth rate in the absence of closure. Int J Fatigue 19 Suppl. 1 (1997) S211-S221
6. Vogel W., Wilhelm M., and Gerold V. Persistent slip bands in fatigued peak aged Al-Zn-Mg single crystals - II. Persistent slip bands in front of stage I fatigue cracks. Acta Metall 30 (1982) 31-35
7. Sha J.B., Shun J., Deng Z.J., and Zhou H.J. Micro-crack tip fracture of commercial grade aluminium under mixed mode loading. Theor Appl Fract Mech 31 (1999) 119-130
8. Price R.J., and Kelly A. Deformation of age-hardened aluminium alloy crystals - II. Fracture. Acta Metall 12 (1964) 979-992
9. Ulmer D.G., and Altstetter C.J. Hydrogen-induced strain localization and failure of austenitic stainless steels at high hydrogen concentrations. Acta Metall Mater (1991) 1237-1248
10. Laird C., and Smith G.C. Crack propagation in high stress fatigue. Phil Mag 7 (1962) 847-857
11. Nix KJ. The metallography of fatigue in high strength aluminium alloys. PhD thesis. London: Imperial College; December 1980.
12. Neumann P. The geometry of slip processes at a propagating fatigue crack - II. Acta Metall 22 (1974) 1167-1178
13. Pelloux R.M.N. Crack extension by alternating shear. Eng Fract Mech 1 (1970) 697-704
14. Garrett G.G., and Knott J.F. Crystallographic fatigue crack growth in aluminium alloys. Acta Metall 23 (1975) 841-848
15. Kamp N., Gao N., Starink M.J., and Sinclair I. Influence of grain structure and slip planarity on fatigue crack growth in low alloying artificially aged 2xxx aluminium alloys. Int J Fatigue 29 (2007) 869-878
16. Wheeler O.E. Spectrum loading and crack growth. J Basic Eng 94 (1972) 181-186
17. Willenborg J, Engle RM, Wood HA. A crack growth retardation model using an effective stress concept. Technical Report AFFDL-TR-71-1. Wright-Patterson AFB (OH): US Air Force Flight Dynamics Laboratory; January 1971.
18. Newman Jr JC. A crack closure model for predicting fatigue-crack growth under aircraft spectrum loading. In: Methods and models for predicting fatigue crack growth under random loading. ASTM STP 748. New York: American Society for Testing and Materials; 1981. p. 53-84.
19. de Koning AU. A simple crack closure model for prediction of fatigue crack growth rates under variable-amplitude loading. In: Fracture mechanics: thirteenth conference. New York: American Society for Testing and Materials; 1981. p. 63-85.
20. Elber W. Fatigue crack closure under cyclic tension. Eng Fract Mech 2 (1970) 37-45
21. Vasudevan A.K., Sadananda K., and Louat N. A review of crack closure, fatigue crack threshold and related phenomena. Mater Sci Eng AI 88 (1994) 1-22
22. Palmberg B. Crack growth data for two aluminium alloys 7050-T73651 and 2024-T3. Technical Report FFA TN 1984-51. Flygtekniska Försöksanstalten - The Aeronautical Research Institute of Sweden; 1984.
23. Wright-Patterson Air Force Base, AFRL/VASM, AFGROW Reference Manual (version 4.0); 2003.
24. Suresh S., and Ritchie R.O. Propagation of short fatigue cracks. Int Metals Rev 29 6 (1984) 445-476
25. Barter S.A., Sharp K.P., Holden G., and Clark G. Initiation and early growth of fatigue cracks in an aerospace aluminium alloy. Fatigue Fract Eng Mater Struct 25 2 (2002) 111-125
26. Beachem C.D. Microscopic fatigue fracture surface features in 2024-T3 aluminum and the influence of crack propagation angle upon their formation. ASM Trans Quart 60 3 (1967) 324-343
27. Harren S.V., Déve H.E., and Asaro R.J. Shear band formation in plane strain compression. Acta Metall 36 9 (1988) 2435-2480
28. Gerold V., and Karnthaler H.P. On the origin of planar slip in f.c.c. alloys. Acta Metall 37 8 (1989) 2177-2183