Ultrasonic Characterization of Residual Stress in Shot Peened AI 7075 Alloy Using Acoustic Signature

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We attempted to estimate the residual stress which evolved during the shot peening of Al 7075 alloy using leaky surface acoustic wave (LSAW). Shot peening was conducted to produce a variation in the compressive residual stress with the depth from the surface at a shot velocity of 30m/s. The LSAW velocity was measured using a scanning acoustic microscopy (SAM). The Vickers hardness profile obtained inwards from the surface showed significant work hardening of the near surface layer with a thickness of about 0.3mm. The variation in the LSAW velocity through the shot peened surface layer was in good agreement with the distribution of the residual stress measured by X-ray diffraction.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

1475-1478

DOI:

10.4028/www.scientific.net/KEM.321-323.1475

Citation:

C.S. Kim et al., "Ultrasonic Characterization of Residual Stress in Shot Peened AI 7075 Alloy Using Acoustic Signature", Key Engineering Materials, Vols. 321-323, pp. 1475-1478, 2006

Online since:

October 2006

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$38.00

[1] S. Sathish, T.J. Moran, R.W. Martin and R. Reibel: Mater. Sci. Eng. A399 (2005), p.84.

[2] M. Benedetti, T. Bortolamedi, V. Fontanari and F. Frendo: Int. J. Fatigue 26 (2004), p.889.

[3] D. Rats, J. Stebut and F. Augereau: Thin Solid Films 355-356 (1999), p.347.

[4] F. Augereau, V. Roque, L. Robert and G. Despaux: Mater. Sci. Eng. A266 (1999), p.285.

[5] T. Ungar and A. Borbely: Appl. Phys. Lett. 69(21) (1996), p.3173.

[6] S. Li, J.C. Zhao, Q.Y. Hu, H.K. Liu, S.X. Dou and W. Gao: Physica C 294 (1998).

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