Experimental Study on CTOD Fracture Toughness of Welded Joints of Low Temperature Steel

Zong Tao Fang; Bo Sun; Chun Run Li

doi:10.4028/www.scientific.net/AMR.328-330.1272

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 328-330Experimental Study on CTOD Fracture Toughness of...

Experimental Study on CTOD Fracture Toughness of Welded Joints of Low Temperature Steel

Abstract:

According to BS7448 fracture toughness test standard, crack tip opening displacement (CTOD) for ASTM A333 Gr.6 low temperature steel which is used in offshore platform were carried out in low temperature (0°C, -29°C). Three point bending tests were conducted on the specimens, the dimension of which is B×2B (B is the thickness) and notch direction is NP. The final value of CTOD was calculated by P-V curves of both the welds and HAZ (heat affected zone). And the experimental results were analyzed and discussed in the paper. The low temperature steel welded joints show good low temperature toughness, the selected welding procedure is applied to construction of pipelines.The CTOD value of HAZ is larger than weld metal and weld is the weakest position in the whole structure. The experiment results provide an important basis for the choice of welding method and welding process parameters, ECA assessment and construction of offshore platform.

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Periodical:

Advanced Materials Research (Volumes 328-330)

Pages:

1272-1276

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.328-330.1272

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Online since:

September 2011

Authors:

Zong Tao Fang, Bo Sun, Chun Run Li

Keywords:

Crack Tip Opening Displacement (CTOD), Fracture Toughness, Low Temperature Steel

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References

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