基于HELP和hede损伤模型对铁素体钢氢疲劳行为的单独和联合影响的理论研究

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-02-08 DOI:10.1016/j.ijhydene.2025.01.459

Alexandra Stark , Petra Sonnweber-Ribic , Christian Elsässer

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引用次数: 0

摘要

本文采用氢扩散-晶体塑性耦合有限元（CPFE）模型，对氢对铁素体钢疲劳行为的影响进行了全面研究。研究了基于氢增强局部塑性（HELP）和氢增强脱粘（HEDE）机制的不同损伤模型的单独和联合效应。利用疲劳指标参数（FIP）的概念，考虑材料的多晶微观结构，建立材料氢脆（HE）机制与疲劳损伤之间的联系，对材料在疲劳加载过程中的退化进行测量。研究强调了氢气压力变化对不同氢气条件的影响。模拟结果表明，氢的存在增强了疲劳裂纹的萌生，揭示了两种损伤模型之间复杂的相互作用。在较高的气体压力下，这种相互作用成为主要因素。这一发现与实验观察结果一致，为氢诱导疲劳损伤提供了有价值的见解。

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Theoretical study of individual and combined effects of HELP- and HEDE-based damage models on the fatigue behavior of ferritic steel by hydrogen

This study presents a comprehensive investigation of the influence of hydrogen on the fatigue behavior of ferritic steel using a coupled hydrogen-diffusion and crystal-plasticity finite-element (CPFE) model. The individual and combined effects of different damage models based on the Hydrogen Enhanced Localized Plasticity (HELP) and Hydrogen Enhanced Decohesion (HEDE) mechanisms are examined. The fatigue indicator parameter (FIP) concept is utilized to measure the degradation of the material during fatigue loading, considering its multicrystalline microstructure and establishing a link between hydrogen embrittlement (HE) mechanisms and fatigue damage. The study highlights the impact of diverse hydrogen conditions by variation of the hydrogen gas pressure. The simulation results demonstrate an enhanced fatigue crack initiation in the presence of hydrogen, revealing a complex interaction between both damage models. This interaction emerges as the primary factor at higher gas pressures. The findings are in line with experimental observations and provide valuable insights into hydrogen-induced fatigue damage.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.