文献类型：期刊文献

英文题名：Predictive environmental hydrogen embrittlement on fracture toughness of commercial ferritic steels with hydrogen-modified fracture strain model

作者：Huang, Song[1];Hui, Hu[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：47

期号：19

起止页码：10777

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20220911737021);WOS:【SCI-EXPANDED(收录号:WOS:000791319400001)】；

基金：& nbsp;This work was supported by the National Natural Science Foundation of China-Natural Science Foundation for youth scientist (Grand No. 51905173) .

语种：英文

外文关键词：Hydrogen embrittlement; Fracture strain; Fracture toughness; Numerical prediction; CrMo steel

摘要：In this work, a practical numerical model with few parameters was proposed for the prediction of environmental hydrogen embrittlement. The proposed method adopts hydrogen enhanced plasticity-based mechanism in a fracture strain model to describe hydrogen embrittlement. Fracture toughness degradation of three commercial steels SA372J70, AISI4130 and X80 in high pressure hydrogen environment were investigated. Firstly, governing equations for hydrogen distribution and material damage evolution was established. Hydrogen enhanced localized flow softening effect was coupled within fracture strain dependency on stress triaxiality. Then, the numerical implementation and identification process of model parameters was described. Model parameters of the investigated steels were determined based on experiment results from literatures. Finally, with the calibrated model, fracture toughness reduction of the steels was predicted in a wide range of hydrogen pressure. The prediction results were compared with experimental results. Reasonable accuracy was reached. The proposed method is an attempt to reach balance between physical accurate prediction and engineering practicality. It is promising to provide a simplified numerical tool for the design and fit for service evaluation of hydrogen storage vessels.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.