Experimental Study on the Fracture Toughness of Welded Joints of API X90 High-grade Pipeline Steels Using Single-Edge-Notched Tension Specimens

The fracture toughness and R-curves of welded joints of API X90 pipeline steels were experimentally studied. Single-edge- notched tension (SENT) specimens and a normalization method were adopted. Joints welded by using three technologies (A, B, and C) were investigated. The results show that the SEN...

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Bibliographic Details
Published in:Arabian journal for science and engineering (2011) 2019-02, Vol.44 (2), p.1033-1041
Main Authors: Kong, Lingzhen, Zhou, Xiayi, Chen, Liqiong, Huang, Kun, Chen, Jie
Format: Article
Language:English
Subjects:
Base metal
Engineering
Fracture toughness
Heat affected zone
Heat treating
Humanities and Social Sciences
multidisciplinary
Research Article - Mechanical Engineering
Science
Welded joints
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Summary:The fracture toughness and R-curves of welded joints of API X90 pipeline steels were experimentally studied. Single-edge- notched tension (SENT) specimens and a normalization method were adopted. Joints welded by using three technologies (A, B, and C) were investigated. The results show that the SENT specimen could be used to test the fracture toughness and R-curves of the welded joint; the welded joint of welding method B presented the poorest fracture toughness; and the R-curves and fracture toughness of the heat-affected zone were seriously affected by the weld zone and base metal. A new idea to test the fracture toughness and R-curves of the heat-affected zone was also proposed.
ISSN:2193-567X
1319-8025
2191-4281
DOI:10.1007/s13369-018-3396-7