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Quantification of Splitting in X80 Pipeline Steel

[+] Author Affiliations
Alexey Gervasyev, Roumen Petrov

Ghent University, Ghent, Belgium

Igor Pyshmintsev

R&D Center TMK, Ltd., Moscow, Russia

Chunyong Huo

Tubular Goods Research Institute of CNPC, Xian, China

Frank Barbaro

Barbaro & Associates, Wollongong, Australia

Paper No. IPC2018-78389, pp. V003T05A019; 13 pages
doi:10.1115/IPC2018-78389
From:
  • 2018 12th International Pipeline Conference
  • Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining
  • Calgary, Alberta, Canada, September 24–28, 2018
  • Conference Sponsors: Pipeline Division
  • ISBN: 978-0-7918-5188-3
  • Copyright © 2018 by ASME

abstract

The results of in-depth analysis of microstructure and crystallographic texture of several industrial batches of line pipes with known full-scale burst test results are presented. Several microstructural features promoting splitting are highlighted and quantified using electron back-scattered diffraction (EBSD) data. The actual splitting intensity is evaluated by means of Charpy tests in the direction of pipe wall thickness (Z-direction) and correlates with the microstructural parameters determined by EBSD analysis. This knowledge can be used in the design of thermo-mechanical controlled processing (TMCP) dedicated to production of splitting-free steel.

Copyright © 2018 by ASME
Topics: Steel , Pipelines

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