Fatigue, Fracture and Hydrogen Embrittlement Behavior of Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 2727

Special Issue Editor


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Guest Editor
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
Interests: metallic materials; mechanical properties; forming process

Special Issue Information

Dear Colleagues,

The use life of structural materials is to a large extent influenced by their service conditions, particularly in the coupled effect of cyclic load and corrosion environment. In the last several decades, there has emerged a huge number of new studies on fatigue and environmental fracture of metallic materials based on the development of new theories, testing techniques, and experimental phenomena. For example, multi-mechanical behaviors of various structural materials were explored in hydrogen-related engineering because of hydrogen as a potential clean energy carrier in the future. Advanced materials such as high-entropy alloy also inspired the interest of metallurgists in the world, focusing on their failure behavior as well as service properties. These studies are of utmost importance to ensure the structural integrity or promote the practical engineering application of advanced materials. With a new view on this aspect, our Special Issue aims to seek a wide set of articles on the topic of fatigue, fracture, and hydrogen embrittlement of metallic materials, and we hope this issue can offer an excellent platform for metallurgists and material/mechanical scientists to discuss the latest progress in this field.

Prof. Dr. Liangyun Lan
Guest Editor

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Keywords

  • Metals and alloys
  • Mechanical testing
  • Fatigue behavior
  • Hydrogen embrittlement
  • Microstructure
  • Theory and modelling
  • Fracture mechanics
  • Fracture mechanism
  • Fractographs
  • Life prediction

Published Papers (1 paper)

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Research

15 pages, 24583 KiB  
Article
Hydrogen Stress Cracking Behaviour in Dissimilar Welded Joints of Duplex Stainless Steel and Carbon Steel
by Hanji Park, Byungrok Moon, Younghoon Moon and Namhyun Kang
Metals 2021, 11(7), 1039; https://doi.org/10.3390/met11071039 - 29 Jun 2021
Cited by 7 | Viewed by 2212
Abstract
As the need for duplex stainless steel (DSS) increases, it is necessary to evaluate hydrogen stress cracking (HSC) in dissimilar welded joints (WJs) of DSS and carbon steel. This study aims to investigate the effect of the weld microstructure on the HSC behaviour [...] Read more.
As the need for duplex stainless steel (DSS) increases, it is necessary to evaluate hydrogen stress cracking (HSC) in dissimilar welded joints (WJs) of DSS and carbon steel. This study aims to investigate the effect of the weld microstructure on the HSC behaviour of dissimilar gas-tungsten arc welds of DSS and carbon steel. In situ slow-strain rate testing (SSRT) with hydrogen charging was conducted for transverse WJs, which fractured in the softened heat-affected zone of the carbon steel under hydrogen-free conditions. However, HSC occurred at the martensite band and the interface of the austenite and martensite bands in the type-II boundary. The band acted as an HSC initiation site because of the presence of a large amount of trapped hydrogen and a high strain concentration during the SSRT with hydrogen charging. Even though some weld microstructures such as the austenite and martensite bands in type-II boundaries were harmless under normal hydrogen-free conditions, they had a negative effect in a hydrogen atmosphere, resulting in the premature rupture of the weld. Eventually, a premature fracture occurred during the in situ SSRT in the type-II boundary because of the hydrogen-enhanced strain-induced void (HESIV) and hydrogen-enhanced localised plasticity (HELP) mechanisms. Full article
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