@inproceedings{6f15cfa83c764554827994e245538b7a,
title = "Acoustic effects on cyclic-tension fatigue of Al-4Cu-lMg alloy by ultrasonic shear wave methods",
abstract = "Cyclic-tension fatigue of aluminum alloy, Al-4Cu-1Mg, has been determined by usage of SV wave reflection and SH wave transmission methods. Internal friction measured by SV method begins to increase rapidly from normalized fatigue ratio of about 0.5, showing dominating interaction of movable dislocations with the waves, as viscoelastic effect. Propagation time and logarithmic damping ratio in SH method decrease with increase of the fatigue degree due to shift of residual stress, as acoustoelastic effect. The logarithmic damping ratio shows better correlation with the residual-stress shift than the propagation time because acoustic velocity is considered to be affected significantly by pile up dislocation.",
keywords = "Acoustoelasticity, Fatigue, Nondestructive evaluation, Shear wave, Viscoelasticity",
author = "H. Yamagishi and M. Fukuhara and A. Chiba",
year = "2009",
month = oct,
day = "5",
language = "English",
isbn = "9780873397384",
series = "TMS Annual Meeting",
pages = "33--40",
booktitle = "TMS 2009 - 138th Annual Meeting and Exhibition - Supplemental Proceedings",
note = "TMS 2009 - 138th Annual Meeting and Exhibition ; Conference date: 15-02-2009 Through 19-02-2009",
}