Hydrogen Embrittlement Prevention in High Strength Steels by Application of Various Surface Coatings-A Review

Dwivedi, Sandeep Kumar; Vishwakarma, Manish

doi:10.1007/978-981-15-8542-5_58

Cited by 10 publications

(10 citation statements)

References 70 publications

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“…However this should be done carefully as their chances of hydrogen entry in metal during the coating process. [8,10,17] The thermal sprayed coatings of alloys which include Ni and Cr can prevent HE. However the presence of pores and their size and density can affect their effectiveness.…”

Section: Prevention Of He In Fatiguementioning

confidence: 99%

“…[22] Figure 5: Graph showing difference in hydrogen diffusion coefficient for austenitic steel, ferritic steel, Ni, Cd and Sn [8] The use of various coatings like graphene, niobium, and PTFE can also help in reducing material susceptibility to HE. [10,12] Using methods like baking to reduce the total diffused hydrogen content in material to keep it below the critical hydrogen concentration is one of the methods which can be used to prevent the HE effect on fatigue life of a material or using special heat treatment technique (NDH -HT) used by Murakami et. al.…”

Section: Prevention Of He In Fatiguementioning

confidence: 99%

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A study of the effect of hydrogen on the fatigue behaviour of metals

Lokhande

Vishwakarma

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Hydrogen Embrittlement is a phenomenon in which the presence of hydrogen can lead to various detrimental effects on the mechanical properties of the material. These effects include reduction in ductility, delayed fracture under constant loading, increase in fatigue crack initiation and growth rates, and subcritical cracking even below the threshold fracture toughness of the material. Fatigue is one of the most common modes of material nature during the operation of components during their service life. Hence it is very important to study the effect of hydrogen on the fatigue behaviour of steel and find methods for their prevention. This paper deals with the study of hydrogen on various types of fatigue in materials, various factors that affect the susceptibility to HE in fatigue, the effect on the microscopic morphology of the fatigue crack generated and the methods suggested for the prevention of HE in fatigue.

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Section: Prevention Of He In Fatiguementioning

confidence: 99%

Section: Prevention Of He In Fatiguementioning

confidence: 99%

A study of the effect of hydrogen on the fatigue behaviour of metals

Lokhande

Vishwakarma

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Hydrogen embrittlement (HE) can cause a reduction in the tensile strength, ductility, fracture strength, and toughness of materials (Shen, 2010;Seki et al, 2012;Dwivedi and Vishwakarma, 2021). For safety reasons, the degradation of material mechanical properties caused by HE cannot be ignored, especially under the extreme operating conditions in nuclear reactors (Harries and Broomfield, 1963;Koutsky, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…For safety reasons, the degradation of material mechanical properties caused by HE cannot be ignored, especially under the extreme operating conditions in nuclear reactors (Harries and Broomfield, 1963;Koutsky, 1990). Generally, there are two kinds of HE (Qian and Atrens, 2013;Popov et al, 2018;Dwivedi and Vishwakarma, 2021): 1) internal HE, which is caused by hydrogen introduced through the fabrication process, such as acid cleaning, electroplating, protective coatings, and welding and 2) external HE, which is caused by hydrogen sourcing from the working environment. When interacting with metal and alloy surfaces, a hydrogen molecule can dissociate into two hydrogen atoms and then adsorb on the surfaces (Johnson and Carter, 2010;Zhang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…When interacting with metal and alloy surfaces, a hydrogen molecule can dissociate into two hydrogen atoms and then adsorb on the surfaces (Johnson and Carter, 2010;Zhang et al, 2013). Due to the high mobility and chemical reactivity, the hydrogen atoms would permeate the surface and tend to aggregate inside the materials at defects, dislocations, voids, grain/ phase boundaries, microcracks, precipitates, interfaces, and so on (Dwivedi and Vishwakarma, 2021). The aggregated hydrogen atoms may form brittle hydrides with the alloy compositions and form hydrogen molecules again (Dwivedi and Vishwakarma, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Atom and Molecule Adsorptions on FeCrAl (100) Surface: A First-Principle Study

Li¹,

Ma²,

Zhou³

et al. 2021

Front. Energy Res.

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FeCrAl alloys are promising accident-tolerant fuel (ATF) cladding materials for applications in light water reactors (LWRs). Despite the excellent mechanical and antioxidation properties, this series of iron-based alloys has poor hydrogen embrittlement (HE) resistance due to the strong hydrogen uptaking ability. The hydrogen embrittlement effect can cause the degradation and premature failure of the material, and this effect can be enhanced by the high-temperature/high-pressure/high-irradiation environment in reactors. So, the potential danger should be taken seriously. In this paper, we have studied the hydrogen atom and molecule adsorptions on both Fe (100) and FeCrAl (100) surfaces to discover how the hydrogen atom and molecule (H/H2) interact with the Fe and FeCrAl (100) surface in the first place. The results show that there are strong element effects on the FeCrAl surface. The Al atom itself has no interaction with hydrogen. When the Al atom is beside the Fe atom, this Fe atom has a slightly lower interaction with hydrogen. However, the Al atom beside the Cr atom will enhance the hydrogen interaction with this Cr atom. On the other hand, when the Cr atom is beside the Fe atom, these two atoms (Fe–Cr bridge site) can reduce the interactions with H. In addition, when two Cr and two Fe atoms together make a four-fold site (FF site), the two Cr atoms can increase the interaction of the two Fe atoms with H. The element effects discovered can be a good guide for making hydrogen prevention coatings.

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