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Author:

Song, Guorong (Song, Guorong.) | Xu, Yuyang (Xu, Yuyang.) | Liu, Hongshi (Liu, Hongshi.) | Lu, Yan (Lu, Yan.) | Wu, Bin (Wu, Bin.) | He, Cunfu (He, Cunfu.) (Scholars:何存富)

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EI Scopus PKU CSCD

Abstract:

The ultrasonic non-destructive evaluation of elastic constants based on acoustic microscopy utilizes a point- or line-focus transducer to perform the immersion defocusing measurement towards the specimen, so that the acoustic properties can be obtained and used to inverse the mechanical properties. In practical engineering applications, problems like the dimensions of workpiece are too large or the workpiece can not be immersed in water are frequently encountered, resulting in the inapplicability of defocusing measurements. In order to solve this kind of problems, a new type colloidal coupling medium was developed. This colloidal coupling medium possesses many advantages such as easy to prepare, low cost, easy to clean off, environment friendly. The formulations are optimized through many different proportion experiments, in order that the acoustic characteristics (density, sound velocity, acoustic impedance) can match the water. Then, this coupling medium was used in the ultrasonic non-destructive evaluation of elastic constants of aluminum, steel and titanium specimens. The experimental results were consistent with the ones using water as coupling fluid, and show great agreements with the theoretical values and the results by conventional tensile test. A practical measurement on elastic constants of large scale aluminum plate was also carried out, and the results coincides with the theoretical ones. Thus, this study shows that the evaluation results by this new type colloidal acoustic coupling medium can meet the demands of defocusing measurements using focusing ultrasonic transducers. It offers an effective technical method to the engineering application of ultrasonic non-destructive evaluation of elastic constants based on acoustic microscopy. © 2016, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.

Keyword:

Nondestructive examination Ultrasonic testing Transducers Acoustic microscopes Acoustic variables measurement Sols Tensile testing Ultrasonic transducers Elastic constants Inverse problems Acoustic impedance

Author Community:

  • [ 1 ] [Song, Guorong]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Xu, Yuyang]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Liu, Hongshi]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Lu, Yan]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [Wu, Bin]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 6 ] [He, Cunfu]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China

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Source :

Journal of Basic Science and Engineering

ISSN: 1005-0930

Year: 2016

Issue: 5

Volume: 24

Page: 1046-1055

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 12

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