Methods for breaking strength determination of highductile pipeline steels

V. S. Vahrusheva, E. A. Grimalovskaya

Abstract


Purpose. New  methods  of  high-strength  construction  materials  receiving  lead  to  formation  of  new  types of  the  metal structure and change the fracture mode at the test. In connection with it, problems of ductile fracture propagation control are arisen. The aim of the paper is to analyze basic approaches of the ductile properties’ level determination and breaking strength determination of high-strength  pipeline steels. Methodology.  In this paper, existing methods for breaking strength determination of high-ductile pipeline steels are analyzed. Results. It is shown that methods for breaking strength determination of high-strength and high-ductile pipeline steels are often insufficiently exact, and they are in need of correction and further investigations.  Originality. The analysis discovers disadvantages and imperfections of existing methods of ductile fracture propagation evaluation. Practical value. In this paper  necessity  to  create  the  universal  methodology that  allows fairly  and  exactly determinate  breaking  strength of  high-ductile pipeline steels is proved.


Keywords


methods for breaking strength determination; high-ductile steels; destruction energy.

References


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GOST Style Citations


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2. Colbett K.T., et al.: High Strength Steel Pipeline Economics. Proc. Thirteenth ISOPE Conference, Hawaii USA, May 2003

3. Felber S., Loibnegger F. The pipeline-steels X100 and X120. XI-929-09.

4. Demofonti G., Mannucci G., Roovers P. Existing methods for the evaluation of material fracture resistance for high-grade steel pepilines. Joint Technical Meeting, Canberra, 16-19 thApril, 2007. – Режим доступа: www.researchgate.net.

5. ISO 3183:2007. Petroleum and natural gas industries – Steel pipe for pipeline transportation system. – Режим доступа: www. iso.org

6. Cosham A., Jones D.G., Eiber R., Hopkins Ph. Don’t drop the drop-weight tear test. International Conference on Pipeline Technology, Ostende, Belgium, October 12-4 2009. – Режим доступа: www.pipemag.com.

7. Maxey W.A., Kiefner J.F., Eiber R.J., “Ductile Fracture Arrest in Gas Pipelines”, NG-18 Report No. 100 AGA, 1976.

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15. Reuven R. et al. CTOA results for X65 and X100 pipeline steels: influence of displacement rate / Proceedings of IPC 2008. Calgary Alberta.

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