|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Effect of Titanium Contents on Hydrogen Induced Cracking Susceptibility and Hydrogen Permeation Characteristic of X80 Pipeline Steel
||Longfei Li, Bo Song, Zhen Liu, Xiaokang Cui
|On-Site Speaker (Planned)
The effect of different titanium contents in X80 pipeline steel on HIC resistance and hydrogen permeation properties was investigated in laboratory. The results demonstrated that with the increase of Ti contents in tested steels, the susceptibility of HIC descends first rapidly at 0.010% and then ascend slowly. In addition, it can be observed by SEM that when the Ti contents are relatively lower the inclusions near the hydrogen induced cracks most are carbides containing Cr and Mo. And, when the Ti content is up to 0.028% there are a small number of inclusions containing Ti. Furthermore, with the increase of Ti contents the apparent diffusivity (Dapp) of hydrogen atoms decreases and the solubility (capp) of hydrogen increases. In terms of the results of HIC, the lower Dapp and higher capp are, the more the steel is susceptible to HIC.
||Planned: Supplemental Proceedings volume