Experimental Study on CTOD Fracture Toughness of Welded Joints of Low Temperature Steel
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℃,-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.
Low temperature steel Crack Tip Opening Displacement (CTOD) Fracture Toughness
Zong tao Fang Bo Sun Chun run Li
CNPC Key Laboratory of Offshore Engineering CNPC Research Institute of Engineering Technology No.40 Jintang Road, Tanggu District, Tianjin(300451), China
国际会议
2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)
广州
英文
1272-1276
2011-11-18（万方平台首次上网日期，不代表论文的发表时间）