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《Materials for Mechanical Engineering》 2013-03
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Fracture Toughness of Domestic X100 High Strength Linepipe Steel with Different Thicknesses

MA Qiu-rong1,2,ZHANG Teng2,LI He1,LIU Xiao-feng3(1.CNPC Tubular Goods Research Institute,Xi′an 710065,China;2.School of Materials Science and Engineering, Xi′an Jiaotong University,Xi′an 710049,China;3.Third Engineering Company of China Petroleum Pipeline Bureau,Zhongmu 451450,China)  
The fracture toughness of X100 linepipe steel with different thicknesses was studied by crack tip opening displacement(CTOD) test,and the effect of the sample thickness on crack initiation value δ0.2 was discussed.The results show that crack initiation value δ0.2 of X100 linepipe steel with thicknesses of 12,10,8 mm were 0.323,0.267,0.265 mm,respectively.The thickness of the sample used during CTOD testing should be equivalent with the wall thickness of actual steel pipe.
【CateGory Index】: TG142.4
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