0

Full Content is available to subscribers

Subscribe/Learn More  >

Evaluation of the Rolling Direction Effect in the Acoustoelastic Properties for API 5L X70 Steel Used in Pipelines

[+] Author Affiliations
Auteliano A. Santos, Sidney F. Caetano, Marcilio Haddad Andrino, Roseana E. Trevisan

UNICAMP, Campinas, SP, Brasil

Don E. Bray

Don E. Bray, Inc., College Station, TX

Paper No. PVP2004-2819, pp. 85-90; 6 pages
doi:10.1115/PVP2004-2819
From:
  • ASME/JSME 2004 Pressure Vessels and Piping Conference
  • Recent Advances in Nondestructive Evaluation Techniques for Material Science and Industries
  • San Diego, California, USA, July 25–29, 2004
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4679-2
  • Copyright © 2004 by ASME

abstract

Ultrasonic evaluation of stresses has experienced great development in the last decade, mostly because of the new electronic instruments and high-speed data acquisition systems now available. Past applications have been applied mostly using shear waves and the birefringence technique. Longitudinal critically refracted (skimming) waves have proved to be more sensitive to stress variation, and have been applied recently to oil steel pipelines. Oil pipe failures have caused a lot of environmental damage in Brazil. The environmental and economical costs are very high. This work describes part of a research effort to further apply longitudinal critically refracted waves to inspect the welded region in pipes in Brazil through a study of the acoustoelastic constants. Twenty-eight samples were cut from a flat plate of the oil industry class steel (API 5L X70) which would be typically formed into pipe. The samples were prepared for tensile testing. Half of those were cut from what would be the longitudinal direction of the pipe, and the other half from the perpendicular direction. The samples are bars of 760×70×10.8-mm3 . Some bars were stress relieved before the test. The results show that there are significant differences between the acoustoelastic constants for the rolling direction and the perpendicular direction. It is clearly important to have the correct value for the acoustoelastic coefficient when applying the technique to stress measurement. There is a minor, but important influence of the stress relief process.

Copyright © 2004 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In