Results 271 to 280 of about 52,181 (311)

Ultrasonic Evaluation of Composite Fatigue Damage

1994
Damage in composite materials has been detected using ultrasonic nondestructive techniques.1–5 These studies were all performed on thin composite samples subjected to either a quasi-static tensile force or a constant amplitude tensile fatigue load. Changes in basic ultrasonic parameters, attenuation or velocity, were used as an indicator of damage ...
Andrew J. Gavens, Robert E. Green
openaire   +1 more source

Ultrasonic Characterization of Fatigue Crack Closure

1993
The characterization of fatigue crack closure is an important objective because of its influence on fatigue crack propagation, particularly under conditions of variable amplitude loading. This paper describes a nontraditional technique for characterizing closure, in which ultrasonic scattering measurements are used to obtain estimates of the number ...
RB Thompson, O Buck, DK Rehbein
openaire   +1 more source

Nonlinear ultrasonic characterization of fatigue microstructures

International Journal of Fatigue, 2001
Dislocation dipole substructures formed during metal fatigue are shown to produce a substantial distortion of ultrasonic waves propagating through the fatigued material. A model of ultrasonic wave-dislocation dipole interactions is developed that quantifies the wave distortion by means of a material nonlinearity parameter (beta).
John H. Cantrell, William T. Yost
openaire   +1 more source

Laser ultrasonic absorption measurement in fatigue-damaged materials

Ultrasonics, 2002
Changes in the materials microstructure caused by fatigue processes affect the ultrasonic absorption. Thus, quantitative measurement of the ultrasonic absorption should provide an indirect measure of fatigue damage. In this paper we present a study of the ultrasonic absorption in fatigue-damaged metals using the reverberation technique in combination ...
S, Luxenburger, W, Arnold
openaire   +2 more sources

Gigacycle Fatigue Behavior by Ultrasonic Nanocrystalline Surface Modification

Journal of Nanoscience and Nanotechnology, 2012
Nanocrystalline surface layer up to 84 microm in thick is produced on a specimen made of Al6061-T6 alloy by means of surface treatment called ultrasonic nanocrystalline surface modification (UNSM) technique. The refined grain size is produced in the top-layer and it is increased with increasing depth from the top surface.
D G, Ahn, A, Amanov, I S, Cho, K S, Shin, Y S, Pyoun, C S, Lee, I G, Park   +6 more
openaire   +2 more sources

Ultrasonic Fatigue Testing of Ti-6Al-4V

Journal of ASTM International, 2005
Abstract The objective of this research was to investigate the high cycle fatigue behavior of a titanium alloy using an ultrasonic fatigue system. Fatigue testing up to one billion cycles under fully reversed loading conditions was performed to determine the ultra-high cycle fatigue behavior of Ti-6Al-4V.
RJ Morrissey, PJ Golden
openaire   +1 more source

Evaluation of Fatigue Strength by Ultrasonic Fatigue Testing

The Proceedings of Conference of Tokai Branch, 2003
Shigehito NISHIMURA, Akitoshi MATSUO, Noboru EGAMI, Hirohisa KIMACHI   +3 more
openaire   +1 more source

Ultrasonic fatigue

International Metals Reviews, 1980
openaire   +1 more source

Ultrasonic fatigue tests for refractories

Refractories, 1977
I. P. Bas'yas, Yu. K. Malyshkin
openaire   +1 more source

Effect of ultrasonic peening treatment on the fatigue behaviors of a magnesium alloy up to very high cycle regime

Journal of Magnesium and Alloys, 2022
Yao Chen, Chao He, Chong Wang
exaly