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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access September 27, 2012

Ultrasonic detection of spall damage induced by low-velocity repeated impact

  • Naoya Nishimura EMAIL logo , Katsuhiko Murase , Toshihiro Ito , Takeru Watanabe and Roman Nowak
From the journal Open Engineering

Abstract

This paper address the examination of spall damage in medium carbon steel subjected to a repeated impact testing. The experiments were performed well below the threshold spall-stress of 2.6 GPa and the damage introduced in the subsurface volume was investigated using the low frequency scanning acoustic microscopy. Based on B- and C-scan images (the images taken along and perpendicular to the impact surface) we made a qualitative and semi-quantitative evaluation of the damage type (voids in a ductile material or cracks in a brittle one) and its distribution. We found the spall damage development dependent on the amplitude and the duration of the stress pulses. In particular, we proved that the high, long stress pulses induce damage that resembles tensile failure of material, in which voids or cracks nucleate along the spall plane to form macro-cracks. This explains why spall-damage is not seen when the first impact is below the characteristic threshold spall-stress. However, when the tests consist of more than four impacts the spall damage is produced already under stress below the threshold-value.

[1] Davison L., Graham R.A., Phys. Rep., 55, 4 (1979) http://dx.doi.org/10.1016/0370-1573(79)90026-710.1016/0370-1573(79)90026-7Search in Google Scholar

[2] Meyers M.A., Aimone C.T., Progr. Mater. Sci., 28 (1983) 10.1016/0079-6425(83)90003-8Search in Google Scholar

[3] Curran D.R., Seaman L., Shockey D.A., Phys. Rep., 147, 5–6 (1987) http://dx.doi.org/10.1016/0370-1573(87)90049-410.1016/0370-1573(87)90049-4Search in Google Scholar

[4] Nishimura N., Murase K., Ito T., Nowak R., Int. J. Impact Eng., 38, 4 (2011) http://dx.doi.org/10.1016/j.ijimpeng.2010.10.03210.1016/j.ijimpeng.2010.10.032Search in Google Scholar

[5] Chrobak D., Tymiak N., Beaber A., Ugurlu O., et al., Nature Nanotechn. 6, (2011) 10.1038/nnano.2011.118Search in Google Scholar PubMed

[6] Suresh S., Fatigue of Materials, (Cambridge University Press. 1998) 10.1017/CBO9780511806575Search in Google Scholar

[7] Oved Y., Luttwak G.E., J. Comp. Mat., 12 (1978) 10.1177/002199837801200107Search in Google Scholar

[8] Hayashi T., Tanaka Y., Impact Engineering, (Nikkan Kogyo Shimbun Ltd. 1988) Search in Google Scholar

[9] Zukas J.A., High Velocity Impact Dynamics, (A Wiley-Interscience Publication: John Wiley & Sons, INC. 1990) Search in Google Scholar

[10] Kawashima K., Trans. of JSME-A, 67, 655 (2001) Search in Google Scholar

[11] Gilmore R.S., Tam K.C., Young J.D., Howard D.R., Phil. Trans. R Soc., London. A320 (1986) Search in Google Scholar

[12] Tittmann B., Miyasaka C., Kasano H., in Proceedings of ECNDT 2006, Th.4.7.4. Search in Google Scholar

[13] Takada M., Haccho M., Hayashi M., Uchino F., Optical and Electro-Optical Engineering Contact., 27, 4 (1989) Search in Google Scholar

[14] Kino G.S., Acoustic Waves: Devices, Imaging, and Analog Signal Processing, (Prentice-Hall. 1987) Search in Google Scholar

[15] Kawashima K., Fujii I., Review of Progress in QNDE., 14 (1995) Search in Google Scholar

[16] Kawashima K., Okada J., Nawa K., Nishimura N., Review of progress in QNDE., 20 (2001) Search in Google Scholar

Published Online: 2012-9-27
Published in Print: 2012-12-1

© 2012 Versita Warsaw

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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