Hydrogen Embrittlement of Modern Alloys in Advanced Applications

Special Issue Editor


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Guest Editor
School of Mechanical and Mining Engineering, The University of Queensland, St. Lucia 4072, Australia
Interests: steel; hydrogen embrittlement; additive manufacturing

Special Issue Information

Dear Colleagues,

Hydrogen embrittles a wide range of metal alloys, including modern materials used in advanced applications. This topic has become increasingly popular in recent decades under the global push for clean energy and with the emergence of new research domains such as additive manufacturing, high-entropy alloys, and quantum mechanics. With exciting advances in probing and predictive approaches, new solutions are being found at an accelerated pace. These new opportunities have driven the pressing call for our Special Issue, providing a platform for fresh insights into hydrogen embrittlement.

In this Special Issue, we welcome submissions regarding both fundamental and applied research centered around hydrogen embrittlement in metal alloys, especially those with vital engineering applications or exhibiting significant potential. We encourage contributions on new mechanisms, characterization techniques, materials, and models. Research topics should fall within the scope of this Special Issue but may overlap with other research areas where hydrogen’s effects are significant, such as environmental-assisted cracking. New mechanisms in emerging and/or cutting-edge domains are also of special interest. Review papers are also welcome, particularly those that summarize the forefront of hydrogen embrittlement research from a new perspective.

Dr. Huixing Li
Guest Editor

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Keywords

  • hydrogen embrittlement
  • hydrogen diffusion and trapping
  • hydrogen transportation and storage
  • metallic alloys
  • environmental assited cracking

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Published Papers (1 paper)

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Research

21 pages, 7136 KiB  
Article
Investigating the Fatigue Response of Cathodically Charged Cold-Finished Mild Steel to Varied Hydrogen Concentrations
by Emmanuel Sey and Zoheir N. Farhat
Corros. Mater. Degrad. 2024, 5(3), 406-426; https://doi.org/10.3390/cmd5030018 - 9 Sep 2024
Viewed by 881
Abstract
This study investigates the fatigue behavior of cold-finished mild steel subjected to electrochemical hydrogen charging under controlled conditions. Samples were subjected to hydrogen charging at constant time in a fixed electrolyte pH, after which the samples underwent fatigue testing under constant loading condition [...] Read more.
This study investigates the fatigue behavior of cold-finished mild steel subjected to electrochemical hydrogen charging under controlled conditions. Samples were subjected to hydrogen charging at constant time in a fixed electrolyte pH, after which the samples underwent fatigue testing under constant loading condition with fixed frequency. The primary objective was to assess the impact of varying hydrogen permeation levels on the number of cycles to failure. The experimental results revealed a complex relationship between hydrogen concentration and fatigue life. Initially, as hydrogen permeation increased, the number of cycles to failure substantially decreased, demonstrating the detrimental effect of diffused hydrogen on the fatigue resistance of samples. This decline in fatigue life was attributed to hydrogen embrittlement (HE) and hydrogen-enhanced decohesion (HEDE) phenomena, which collectively facilitate crack initiation and propagation. However, at high hydrogen concentrations, an unexpected increase in the number of cycles to failure was observed suggesting the existence of a threshold hydrogen concentration beyond which the fatigue mechanisms may be altered, potentially due to a saturation of hydrogen-related defects and mechanisms such as hydrogen-enhanced localized plasticity (HELP). The discovery from this research has significant implications for the material’s application in hydrogen-rich environments, such as those encountered in the energy and transportation industries. Full article
(This article belongs to the Special Issue Hydrogen Embrittlement of Modern Alloys in Advanced Applications)
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