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- W2368825616 abstract "Charpy impact tests of the series of X52 pipe welding seam specimens fabricated by high frequency electric welding(HFW)were carried out at low temperature of-20℃.It was found that the impact toughness values of some specimens were obviously lower than the normal level.The cause of the impact toughness failure of these abnormal specimens was analyzed by the scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDS) and electron backscattered diffraction(EBSD).Experimental results show that in the impact toughness failure specimen,the fracture model is cleavage and intergranular;there is a congregation zone of oxide inclusions in the origin of cracks;there are some congregated perlite zones in the matrix,which results in some brittle bands of congregated perlite in the welding seam generated by squeezing during the HFW.On the other hand,for the normal specimen,the fracture model is dimple and the distribution of perlite in matrix is homogenous.It is concluded that failure of the impact toughness of X52 pipe steel is related to heterogeneous distribution of perlite in matrix during the welding process." @default.
- W2368825616 created "2016-06-24" @default.
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- W2368825616 date "2010-01-01" @default.
- W2368825616 modified "2023-09-26" @default.
- W2368825616 title "Cause Analysis of X52 HFW Pipe Seam's Impact Toughness Failure" @default.
- W2368825616 hasPublicationYear "2010" @default.
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