Experimental Research on Fracture Toughness of High Grade Line Pipe

Abstract:

Crack tip opening displacement (CTOD) tests were carried out on different positions of X70, X80 and X100 pipe by three-point bend testing method. The results show that the crack propagation resistance and the tear modulus of base metal, heat affected zone (HAZ), and weld of X70 and X80 pipe are larger than that of X100 pipe. At the same time,The initial CTOD values and the CTOD values withmaximum load of X70 and X80 pipe are larger than that of X100 pipe.The test results suggest that the fracture toughness, crack initiation and propagation resistance of theX70 and X80 pipe are greater than that of X100 pipe, and the mechanismis analyzed finally.

• Periodical: Key Engineering Materials (Volumes 525-526)
• Pages: 425-428
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.525-526.425
• Online since: November 2012
• Authors: Qing Ren Xiong, Jian Xun Zhang, Yao Rong Feng, Hai Tao Wang, Qiu Rong Ma, Zhen Zhen Xu
• Keywords: CTOD Test, Fracture Toughness, High Grade Line Pipe

References

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DOI: 10.1115/ipc2002-27089

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