Nanocrystalline Steels’ Resistance to Hydrogen Embrittlement

Skołek, E.; Marciniak, S.; Skoczylas, Paweł; Kamiński, J.; Świątnicki, W.

doi:10.1515/amm-2015-0079

Cited by 6 publications

(8 citation statements)

References 21 publications

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“…[53] Nanobainitic microstructure of investigated steel is quite uniform; however, some areas with blocky austenite with cross sections up to 4.33 lm 2 may appear. [5,24,25] Some of these blocks undergo martensitic transformation; thus, it can be assumed that some variations at the internal stresses at the surface may occur. Some microsegregations of Mn, Mo and carbon near ferrite, residual austenite and martensite interfaces may also appear.…”

Section: Discussionmentioning

confidence: 99%

“…Details of the austempering heat treatment that allowed obtaining a nanobainitic microstructure, the microstructure itself and mechanical properties of X37CrMoV5-1 nanobainitic steel are described elsewhere. [5,24,25] Two variants of low-temperature glow discharge carbon coating production were carried out. The first was a single low-temperature carbon coating production in glow discharge conditions at 400°C for 20 minutes in a mixture of CH 4 and N 2 (GDCC).…”

Section: Materials and Methodologymentioning

confidence: 99%

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The Microstructure and Properties of Carbon Thin Films on Nanobainitic Steel

Skołek

Meredyk

Tarnowski

et al. 2021

Metall Mater Trans A

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The aim of this study was to assess whether it is possible to produce a high adhesive carbon coating by applying low-temperature RFCVD and glow discharge methods on nanobainitic X37CrMoV5-1 steel with and without nitrided sublayer. For this purpose, several methods of investigation were used: observations of coating morphology by scanning electron microscopy (SEM), analysis of bonds found in coatings (Raman spectroscopy), microhardness tests and adhesion of coatings (Scratch tests). Our research has shown that low-temperature RFCVD and glow discharge processes of nanobainitic X37CrMoV5-1 steel allow producing carbon coatings that can be described as hardened carbon coatings with very high hardness—> 2000 HV 0.25 in case of RFCVD processes and > 3300 HV 0.025 for glow discharge process and low friction coefficient—near 0.12 at 5 N load. However, the adhesion of produced coatings to the steel substrate strongly depends on the appropriate selection of the process parameters and on the proper preparation of the substrate before the deposition regarding the thermal stability of nanobainite.

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Section: Discussionmentioning

confidence: 99%

Section: Materials and Methodologymentioning

confidence: 99%

The Microstructure and Properties of Carbon Thin Films on Nanobainitic Steel

Skołek

Meredyk

Tarnowski

et al. 2021

Metall Mater Trans A

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“…reasons could be that, being highly alloyed materials, they present high resistance and are difficult to process by SPD (in fact, several SPD dies are manufactured with these steels). Some works have studied the grain refinement, and properties of tool steels processed by SPD (14,62,63,64) . The tool steel R6M5 was subjected to severe plastic deformation torsion (SPDT), and the influence of the initial state of the tool surface was studied.…”

Section: Tool Steelsmentioning

confidence: 99%

“…Although there are some works dedicated to study the grain refinement and properties of tool steels processed by SPD (14,62,63,64) , no studies were found for corrosion behavior in these steels. In many applications, tool steels are coated with transition metal carbides to improve corrosion resistance.…”

Section: Tool Steelsmentioning

confidence: 99%

An Overview on the Corrosion Behavior of Steels Processed by Severe Plastic Deformation

Cardonaa

Castillejo

2023

Mater. Trans.

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Ultrafine grained (UFG) and nanostructured steels have gained attention in the last years because of the possibility of improving both strength and ductility, but also because of their potential for improving several properties in metal applications which allows replacing some conventional steels. The refinement of the microstructure obtained through Severe Plastic Deformation (SPD) has allowed for the improvement of mechanical properties and the performing of several studies related to corrosion control, mitigation, and protection. In this review, the corrosion behavior of ultra-fine grained (UFG) steels is presented regarding the existing literature and the microstructural changes produced through different SPD processes. A focus is placed on the importance of the processes for grain refinement and microstructural changes and, therefore, on the corrosion behavior.Keywords: Severe plastic deformation, corrosion behavior, steels Carbon and alloyed steelsCarbon and alloy steels are the most important engineering alloys because they are widely used in many applications. However, they are very susceptible to corrosion environments and require some corrosion control.

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“…Greater resistance to HE was observed in X37CrMoV5-1 steel after austempering at the bainitic transformation zone compared to the tempered martensite structure of the same material [18]. Improved performance of the steel in presence of hydrogen was attributed to the large density of interfaces of the retained austenite, which trap the hydrogen and reduce the diffusivity and permeability of hydrogen through the steel [20][21][22]. During exploitation, hydrogen can originate from the corrosion reactions [23][24][25], transmutation reactions [26] or during exposure to hydrogen-enriched environment [27,28].…”

Section: Introductionmentioning

confidence: 98%

Study of correlation between the steels susceptibility to hydrogen embrittlement and hydrogen thermal desorption spectroscopy using artificial neural network

Malitckii

Fangnon

Vilaça

2020

Neural Comput & Applic

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Steels are the most used structural material in the world, and hydrogen content and localization within the microstructure play an important role in its properties, namely inducing some level of embrittlement. The characterization of the steels susceptibility to hydrogen embrittlement (HE) is a complex task requiring always a broad and multidisciplinary approach. The target of the present work is to introduce the artificial neural network (ANN) computing system to predict the hydrogen-induced mechanical properties degradation using the hydrogen thermal desorption spectroscopy (TDS) data of the studied steel. Hydrogen sensitivity parameter (HSP) calculated from the reduction of elongation to fracture caused by hydrogen was linked to the corresponding hydrogen thermal desorption spectra measured for austenitic, ferritic, and ferritic-martensitic steel grades. Correlation between the TDS input data and HSP output data was studied using two ANN models. A correlation of 98% was obtained between the experimentally measured HSP values and HSP values predicted using the developed densely connected layers ANN model. The performance of the developed ANN models is good even for never-before-seen steels. The ANN-coupled system based on the TDS is a powerful tool in steels characterization especially in the analysis of the steels susceptibility to HE.

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Nanocrystalline Steels’ Resistance to Hydrogen Embrittlement

Cited by 6 publications

References 21 publications

The Microstructure and Properties of Carbon Thin Films on Nanobainitic Steel

The Microstructure and Properties of Carbon Thin Films on Nanobainitic Steel

An Overview on the Corrosion Behavior of Steels Processed by Severe Plastic Deformation

Study of correlation between the steels susceptibility to hydrogen embrittlement and hydrogen thermal desorption spectroscopy using artificial neural network

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