文献类型：期刊文献

英文题名：Prediction of hydrogen-assisted fracture under coexistence of hydrogen-enhanced plasticity and decohesion

作者：Huang, Song[1,2];Hui, Hu[1];Peng, Jian[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Changzhou Univ, Jiangsu Prov Engn Res Ctr High Level Energy & Powe, Changzhou, Jiangsu, Peoples R China

年份：2023

卷号：48

期号：94

起止页码：36987

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20232614305429);WOS:【SCI-EXPANDED(收录号:WOS:001107107500001)】；

基金：This work was supported by the Jiangsu Province Engineering Research Center of High-Level Energy and Power Equipment (No.JSNYDL-202201) . The financial support of SINOPEC was also acknowledged.

语种：英文

外文关键词：Hydrogen embrittlement; HELP plus HEDE; HELP-mediated HEDE; Ductile to brittle transition; Numerical method

摘要：This work presents a novel strategy to model the coexistence of HELP & HEDE mechanisms. The proposed method accounts for ductile and brittle damage with a competitive fracture criterion to describe the competition effect between HELP & HEDE mechanisms. The cooperation aspect is addressed by a dislocation-enhanced hydrogen accumulation model, which agrees with the HELP-mediated HEDE mechanism. The tensile, fracture toughness, and threshold stress intensity factor tests are simulated in different hydrogen environ-ments. The results demonstrate that the proposed method reproduces the hydrogen -dependent ductile to brittle transition phenomenon. Under different hydrogen condi-tions, the dominating damage mechanism and degradation trends agree with experi-mental observations. Furthermore, for the investigated 4130 steel, the predicted value of fracture toughness and threshold stress intensity factor match the experiment results. The difference in damage kinetics inherent in the two test methods is captured, which supports the rationality of the proposed strategy for HELP and HEDE interaction.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.