Abstract
The fatigue crack propagation behavior in the overaged Al-Zn-Mg-Cu alloy was characterized by optical microscopy, scanning electron microscopy, transmission electron microscopy and electron backscatter diffraction. The results revealed that a fatigue crack tended to transgranularly propagate in the near-threshold regime, whereas intergranular crack propagation was dominant at the high ΔK regime. The transition of crack propagation from a transgranular to an intergranular path that occurred in the Paris regime was strongly influenced by the misorientation of adjacent grains and precipitate free zones. In addition, a crystallographic model of crack propagation was proposed to interpret the transition. The fatigue short crack propagation on a single slip plane was responsible for the formation of a transgranular propagation path in the near-threshold regime. The fatigue long crack propagation, which was conducted by a duplex slip mechanism in the Paris regime, led to the formation of fatigue striations. The formation of a zigzag crack in the near-threshold regime was ascribed to the high misorientation of adjacent grains.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
J. A. Charles, F. A. A. Crane, and J. A. G. Furness, Selection and Use of Engineering Materials, 3rd ed., pp. 227–255, Butterworth Heinemann, Oxford (1997).
E. A. Starke Jr and J. T. Staley, Prog. Aerosp. Sci. 32, 131 (1996).
S. Suresh, A. K. Vasudevan, M. Tosten, and P. R. Howell, Acta Mater. 35, 25 (1987).
R. S. Vecchio, R. W. Hertzberg, and R. Jaccard, Fatigue Fract. Eng. Mater. Struct. 7, 181 (1984).
T. Zhai, A. J. Wilkinson, and J. W. Martin, Acta Mater. 48, 4917 (2000).
T. Zhai, X. P. Jiang, J. X. Li, M. D. Garratt, and G. H. Bray, Int. J. Fatigue. 27, 1202 (2005).
Z. Q. Zheng, B. Cai, T. Zhai, and S. C. Li, Mater. Sci. Eng. A 528, 2017 (2011).
S. X. Li, R. Q. Chu, J. Y. Hou, and Z. G. Wang, Philos. Mag. A 77, 1081 (1998).
H. Zhang, H. Toda, P. C. Qu, Y. Sakaguchi, M. Kobayashi, K. Uesugi, and Y. Suzuki, Acta Mater. 57, 3287 (2009).
H. G. Jian, F. Jiang, L. L. Wei, X. Y. Zheng, and K. Wen, Mater. Sci. Eng. A. 527, 5879 (2010).
K. S. Chan, Int. J. Fracture. 32, 1428 (2010).
G. Hénaff, F. Menan, and G. Odemer, Eng. Fract. Mech. 77, 1975 (2010).
P. J. E. Forsyth, In: Proceedings of Crack Propagation Symposium, pp.76–94, The College of Aeronautics, Cranfield (1962).
B. Künkler, O. Düber, P. Köster, U. Krupp, C.-P. Fritzen, and H.-J. Christ, Eng. Fract. Mech. 75, 715 (2008).
S. Suresh, Fatigue of Materials, 2nd ed., pp.341–342, Cambridge University Press, Cambridge (1998).
C. Q. Bowles and D. Broek, Int. J. Fracture. Mech. 8, 75 (1972).
B. Tomkins, Fatigue Fract. Eng. Mater. Struct. 19, 1295 (1996).
C. Laird, ASTM STP. 415, 131 (1966).
M. N. Desmukh, R. K. Pandey, and A. K. Mukhopadnyay, Mater. Sci. Eng. A 435–436, 318 (2006).
B. Sarkar, M. Marek and E. A. Starke Jr, Metall. Trans. A 12, 1939 (1981).
A. D. B. Gingell and J. E. King, Acta Mater. 45, 3855 (1997).
Y. Xue, H. El Kadiri, M. F. Horstemeyer, J. B. Jordon, and H. Weiland, Acta Mater. 55, 1975 (2007).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chen, X., Liu, Z., Xia, P. et al. Transition of crack propagation from a transgranular to an intergranular path in an overaged Al-Zn-Mg-Cu alloy during cyclic loading. Met. Mater. Int. 19, 197–203 (2013). https://doi.org/10.1007/s12540-013-2009-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12540-013-2009-y