文献类型：期刊文献

英文题名：A novel strategy for estimating the diffusion behavior of hydrogen in metallic materials with the combined effect of stress corrosion and hydrogenation: Case study of 2.25Cr-1Mo-0.25V high-strength steel

作者：Yin, Changdong[1];Wu, Yiwen[2];Xu, Zhou[1];Ye, Dongdong[3];Yao, Jun[1];Chen, Jianjun[4];Liu, Qiang[1];Ge, Xin[1];Ding, Meiling[1]

机构：[1]Wuhu Inst Technol, Sch Elect & Automat, Wuhu 241006, Peoples R China;[2]Inst Intelligent Mfg, Wuhu Inst Technol, Wuhu 241006, Peoples R China;[3]Anhui Polytech Univ, Sch Artificial Intelligence, Wuhu 241000, Peoples R China;[4]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Safety Sci Pressurized Syst, Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：219

外文期刊名：VACUUM

收录：;EI(收录号：20234615044627);WOS:【SCI-EXPANDED(收录号:WOS:001112235500001)】；

基金：This work was supported by the National Natural Science Foundation of China (52205547) , Science and Technology Plan Project of Wuhu City (No. 2022jc48, No. 2022yf67) , Natural Science Research Project of Wuhu Institute of Technology (wzyzr202330, wzyzr202331) , Key projects of Natural Science Research of Universities in Anhui Province (2023AH052384, 2023AH052399, KJ2020A0925) , Key Research and Development Projects in Anhui Province (No. 2022a05020004) , Scientific Research Start-up Fund for Introduced Talents of Wuhu Institute of Technology (wzyrc202201) .

语种：英文

外文关键词：2.25Cr-1Mo-0.25V steel; Electrochemical hydrogen charging; Hydrogen embrittlement; Stress corrosion; Hydrogen diffusivity

摘要：Hydrogen equipment for long-term service in complex hydrogen environment is threatened by the phenomenon of hydrogen-induced damage, and the combined effect of stress corrosion and hydrogen attack can intensify the formation and development of hydrogen damage. In this study, a new strategy to indirectly estimate the hydrogen diffusivity of metallic materials under tensile stress was proposed by combining the electrochemical hydrogen permeation test (EHPT), the hydrogen diffusion descriptive equation based on Fick's law, and hydrogen pre-charged tensile test. The results revealed that the hydrogen permeation curve obtained after considering the effect of the residual hydrogen extraction stage was highly approximate to the theoretical trend. The hydrogen embrittlement (HE) susceptibility of the pre-tensioned tensile and hydrogen-charged specimens increased with increasing stress. At tensile stress (0-400 MPa) the effective hydrogen diffusivity of 2.25Cr-1Mo0.25 V steel was: Deff = 1.1686+ 0.4842 x exp(sigma /277.869). The micrograph from the fracture surfaces also reflected the aggravated brittle fracture characteristics of the steel.