Research of the DWTT Fracture of X70 Pipeline Steel

Abstract:

The DWTT fracture toughness of X70 pipeline steel with different content and grain size of polygonal ferrite was investigated. The results show that when the content of polygon ferrite is above 28%, the shear-area percentage of DWTT fracture begins to decrease instead of increase, while polygonal ferrite toughening effect weakens. It is the difference of the polygonal ferrite content that results in the difference of shear-area percentage of DWTT fracture.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 643-646
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.643
• Online since: June 2012
• Authors: Ying Sun
• Keywords: DWTT, Fracture Toughness, Polygonal Ferrite, X70 Pipeline Steel

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