... be used for high-pressure hydrogen applications due to their resistance against hydrogen embrittlement. In this paper, the hydrogen embrittlement susceptibility of two high strength ASS, UNS S20910 and CrMnNiMoN was investigated. Slow strain rate test (SSRT) of hydrogen precharged specimens were carried...

...Abstract Hydrogen gas is considered as one of promising renewable energy alternatives in the wave of global decarbonation and zero emission. Storage and transporting hydrogen gas impose huge risks in existing pipeline system as result of known hydrogen embrittlement issues with mild carbon steel...

... resistance with increasing bar diameter. HISC hydrogen embrittlement precipitation hardened Ni-based alloys SSRT INTRODUCTION Precipitation-hardened (PH) nickel-base alloys are commonly chosen for highly demanding applications in the Oil & Gas industry because of their high toughness, strength...

... of the catalytic action of H₂S. The increase in absorbed hydrogen by H₂S affects sulfide stress cracking (SSC), which is a type of hydrogen embrittlement (HE). The susceptibility of SSC to cracking increases with strength (hardness), absorbed hydrogen concentration, and external stress. Thus...

..., transporting H₂ may lead to environmental hydrogen embrittlement (HE) for susceptible materials. To minimize the risk of environmentally induced HE, proper material selection is critical when either retrofitting existing equipment and/or manufacturing new isolation valves (or other critical...

... for sour performance evaluation. hydrogen embrittlement fracture toughness WOL DCB gaseous hydrogen sour environment INTRODUCTION The fracture toughness of steels for pressure vessel applications is one of the most important properties that determines the fitness for service of the component...

...), and Electron Backscatter diffraction (EBSD) are deployed to accurately characterize and gain an improved understanding of the hydrogen embrittlement mechanism in CM and AM alloy 718. The higher presence of hydrogen reduced ductility in the as-built / as-received AM samples but did not significantly influence...

...Abstract Hydrogen can be the future energy carrier as it might offer a substitute for fossil fuels. However, it can degrade the mechanical properties of many materials, a phenomenon well known as hydrogen embrittlement (HE) that can lead to a catastrophic failure. Austenitic stainless steels (ASS...

...UNS N09955 alloy 955 precipitation hardened nickel-alloys hydrogen embrittlement High-performance alloy 955 round bars of diameter in the range from 3 in. to 10 in. have been produced as per API 6ACRA - 120K grade of the same alloy except precipitation hardening in the temperature range from 700...

... for SSC cracks revealed that a corrosion pit initially formed then turned into a crack possibly by hydrogen embrittlement (HE), then finally caused unstable crack extension to rapture the specimen. Based on the experimental results for the fissure formation and SSC, the effect of both APC and HE...

... properties; this phenomenon is referred to as hydrogen embrittlement (HE). ^{3 , 4 , 5 , 6} Although, even if investigations of tensile and fatigue in gaseous hydrogen environment have shown a decrease in ductility and increased fatigue crack growth rate, most hydrogen-related studies have been...

... promoted SSC, suggesting that SSC was affected by both active path corrosion (APC) and hydrogen embrittlement (HE) mechanisms. In addition, the fissure shapes and crystal orientations of the microstructure were analyzed to classify the fissures as dissolution (corrosion) or mechanical cracking. Further...

...INTRODUCTION Hydrogen embrittlement problem for steel has been recognized for the industry for decades ¹ . Pipeline steel failure due to hydrogen embrittlement usually initiates at defects and cracks at pipe surfaces ² . The generally accepted hypothesis is that the hydrogen...

... bars in Figure 1 were used to make tensile samples, while the 12.7 mm bar was for diffusible hydrogen measurement discs. A drawing used for the machining of the tensile bar seen in Figure 6 . Internal hydrogen embrittlement (IHE), which results from preexisting hydrogen, or uptake, for example...

...Abstract Hydrogen emerged as a solution to increasing environmental problems and is becoming an important energy resource. However, hydrogen can deteriorate the mechanical performance of metallic components. This phenomenon is known as hydrogen embrittlement (HE). Engineering steels...

...Abstract This paper introduces an innovative approach for mitigating hydrogen embrittlement in materials used in underwater environments, a critical challenge in marine engineering. Our study focuses on developing a comprehensive 'master curve' that encapsulates the complex interplay among key...

... system and offers a comparative evaluation with existing SACP methods. In doing so, it addresses some of the limitations of current SACP systems, including issues like hydrogen embrittlement and premature anode depletion. The goal is to demonstrate the enhanced effectiveness and sustainability...

...Abstract Low alloy steels (LAS), frequently used for pressure-containing equipment in subsea applications, are susceptible to hydrogen embrittlement when exposed to seawater environments under cathodic protection (CP), which can result in a reduction of toughness and ductility. Fracture toughness...

... incorporation of Ni/Fe-based oxides for the as-printed surfaces. Ex-situ hydrogen embrittlement was evaluated by electrochemically charging flat test bars for 72hours in 0.1 M H₂SO₄ + 1 g/L CH₄N₂S then slow strain rate tensile testing (0.0039 mm/min) at room...

.... Selected fracture surfaces are analyzed to rationalize the influence of microstructure and strength on hydrogen-assisted fracture of this class of steels. Hydrogen Embrittlement Pipeline Steels Fatigue Fracture Hydrogen INTRODUCTION The United States has over 1.8 million miles of natural gas (NG...