THE RELATIONSHIP BETWEEN MATERIAL PROPERTY OF LINE PIPE STEEL AND THE HYDROGEN-INTRODUCED CRACKS
The hydrogen introduced cracking (HIC) of pipeline steel is a common problem caused by H2S in oil and gas. The purpose of this study is to investigate the effect of the material of pipeline steel on HIC resistance. The HIC susceptibility was expressed using the following parameters, defined in relation to crack susceptibility ratio (CSR), crack length ratio (CLR), crack thickness ratio (CTR). The microstructures of the section observed using OM and SEM. The results indicate that samples with either large banded structure or inhomogeneous structure showed high susceptibility to HIC, but the cracks propagated paths and the failure mechanisms are different. Also in this study, the susceptibility of this grade of pipeline steel to HIC is irrelative with the grain’s sizes.
XU Xue-Dong GU Bao-Lan
Institute of Microstructure and Property of Advanced Materials, Beijing University of technology, Beijing 100022, China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）