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Study on Correlation of Orientation and Impact Properties in HTP Line-Pipe Steel

[+] Author Affiliations
Lixia Zhu, Yalong Wang, Jinfeng Li, Hongda Chen, Xiaodong He, Xinli Han

Tubular Goods Research Center of CNPC, Xi’an, China

Paper No. IPC2008-64006, pp. 11-14; 4 pages
doi:10.1115/IPC2008-64006
From:
  • 2008 7th International Pipeline Conference
  • 2008 7th International Pipeline Conference, Volume 3
  • Calgary, Alberta, Canada, September 29–October 3, 2008
  • Conference Sponsors: International Petroleum Technology Institute and the Pipeline Division
  • ISBN: 978-0-7918-4859-3 | eISBN: 798-0-7918-3835-8
  • Copyright © 2008 by ASME

abstract

The correlation of impact properties, orientation and temperature in HTP70 line-pipe steel were studied by use of OM, TEM and macroscope fractography based on series temperature Charpy notch impact test of sample with different orientation. The results showed that: HTP70 steel line-pipe has seriously anisotropic properties, the mechanical behaviors vary with the orientation of parallel, 45° and vertical to rolling direction. The samples which parallel to rolling direction have higher impact energy and demixing crack incline. The demixing crack was caused by banding defect, it was affect by dislocation configuration and has certain direction character, and was related to temperature.

Copyright © 2008 by ASME
Topics: Steel , Pipes

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