Crack Growth Behavior of Al Alloy under Ultrasonic Fatigue

Norio Kawagoishi; Q. Chen; M. Oki; Qing Yuan Wang

doi:10.4028/www.scientific.net/KEM.324-325.327

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 324-325Crack Growth Behavior of Al Alloy under Ultrasonic...

Crack Growth Behavior of Al Alloy under Ultrasonic Fatigue

Abstract:

In order to investigate the effect of frequency on the crack growth behavior, ultrasonic fatigue tests were carried out for an extruded age-hardened Al alloy, 7075-T6, and the results were compared with those in rotating bending fatigue. Fatigue strength in ultrasonic was higher than that in rotating bending. This was mainly caused by the retardation of crack initiation. Growth direction of a crack changed from a tensile mode to a shear one in ultrasonic fatigue, though fracture occurred by the growth of a tensile mode in rotating bending. The growth direction of a shear mode crack was inclined about 55 degrees to the tensile axis. The relation between an applied stress σa and a crack depth at transition of growth direction T was expressed by a nT=C, where C and n are constants. These results were discussed from the points of view of the time dependent environmental effect and the texture of material.

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Periodical:

Key Engineering Materials (Volumes 324-325)

Pages:

327-330

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.324-325.327

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Online since:

November 2006

Authors:

Norio Kawagoishi, Q. Chen, M. Oki, Qing Yuan Wang

Keywords:

Aluminium Alloy, Crack Propagation, Environment, Fatigue, Texture, Ultrasonic

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References

[1] Y. Murakami, N. N. Yokoyama and J. Nagata, Fatigue & Fracture of Engineering Materials & Structures, Vol. 25 (2002), p.735.

Google Scholar

[2] J.K. Tien, R.P. Gamble, Metallurgical Transactions, Vol. 2 (1971), p. (1933).

Google Scholar

[3] Y. Furuya, S. Matsuoka, T. Abe and K. Yamaguchi, Transactions of the Japan Society of Mechanical Engineers, Series A, Vol. 68 (2002), p.477.

Google Scholar

[4] K. Miura, S. Takagi, O. Furukimi and S. Tanimura, Journal of the Society of Materials Science, Japan, Vol. 47 (1998), p.1053.

Google Scholar

[5] G. Birkbeck, A. E. Inckel and G. W. J. Waldron, Journal of Materials Science, Vol. 6 (1971), p.319.

Google Scholar

[6] T. Okada, Y. Iwai and S. Sayama, Journal of the Society of Materials Science, Japan, Vol. 31 (1982), p.383.

Google Scholar

[7] N. Kawagoishi, H. Nisitani, Transactions of the Japan Society of Mechanical Engineers, Series A, Vol. 55 (1989).

Google Scholar