UNIVERSAL ULTRASONIC GONIOMETER FOR RAYLEIGH- AND SURFACE SKIMMING LONGITUDINAL WAVE DISPERSION MEASUREMENTS

被引：4

作者：

Barth, M. ^{[1
]}

Kuettner, M. ^{[1
]}

Koehler, B. ^{[1
]}

Bamberg, J. ^{[2
]}

Baron, H. -U. ^{[2
]}

机构：

[1] Fraunhofer IZFP D, Dep Micro & Nano Evaluat, Dresden, Germany

[2] MTU Aero Engines GmbH, Munich, Germany

来源：

REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 31A AND 31B | 2012年 / 1430卷

关键词：

Ultrasound; Goniometer; SAW; Rayleigh Wave; Dispersion; Shot Peening;

D O I：

10.1063/1.4716439

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

There are several approaches for determining the Rayleigh wave dispersion of surface treated materials. Most of them are based either on ultrasonic probes in contact technique or on laser excitation or detection of ultrasound. Disadvantages of these methods for in-service use are coupling problems (contact methods) and very high device costs (laser based methods). The paper presents an immersion technique trying to avoid the disadvantages of the previous approaches for practical use. The High precision Ultrasound Goniometer (HUGO) allows to vary both: the sound beam angles and the distance between the excitation and detection sound beams. Thus, the Rayleigh wave velocity and its dispersion can be determined by two independent methods: by the drop in the reflexion coefficient at the Rayleigh angle and by change in travel time for a given change in travel distance. The dispersion can also be determined for surface skimming longitudinal waves. The application for stress determination in surface treated aero-engine materials is discussed.

引用

页码：1873 / 1880

页数：8