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Study on H2S Stress Corrosin of Welded Joint for X65 Pipeline Steel and Finite Element Numerical Analysis |
Xiaojun Jin;Lixing Huo;YUfeng Zhang;Bingren Bai;Xiaowei Li;Jun Cao |
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Abstract Based on the H2S stress corrosion test for x65 pipeline steel, three-dimensional elastic-plastic finite element model was established. By the numerical analysis of the FEM, stress field and concentration distribution character of hydrogen from the crack tip were obtained. This paper surveyed the microstructure of the joints and studied on the mechanical performance of X65 pipeline steel. It provided experiment basis for the affecting factors of stress corrosion cracking. Moreover, the critical stress intensity factor KISCC and crack propagation velocity were obtained by the wedge-open loading constant displacement specimens. The result of stress corrosion was verified by finite element numerical analysis.
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Received: 18 January 2003
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