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  Solute hydrogen and deuterium observed at the near atomic scale in high-strength steel

Breen, A. J., Stephenson, L., Sun, B., Li, Y., Kasian, O., Raabe, D., et al. (2020). Solute hydrogen and deuterium observed at the near atomic scale in high-strength steel. Acta Materialia, 188, 108-120. doi:10.1016/j.actamat.2020.02.004.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-D9A6-B Version Permalink: http://hdl.handle.net/21.11116/0000-0005-D9AA-7
Genre: Journal Article

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 Creators:
Breen, Andrew J.1, 2, 3, Author              
Stephenson, Leigh1, Author              
Sun, Binhan4, Author              
Li, Yujiao5, Author              
Kasian, Olga6, 7, Author              
Raabe, Dierk8, Author              
Herbig, Michael9, Author              
Gault, Baptiste1, Author              
Affiliations:
1Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
2Australian Centre for Microscopy and Microanalysis, University of Sydney, NSW, Australia, ou_persistent22              
3School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW, Australia, ou_persistent22              
4Mechanism-based Alloy Design, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863383              
5Center for Interface-Dominated High Performance Materials, Ruhr-Universität Bochum, Bochum 44780, Germany, ou_persistent22              
6Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
7Helmholtz Zentrum Berlin, Helmholtz-Institute Erlangen-Nürnberg, 14109 Berlin, Germany, ou_persistent22              
8Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
9Materials Science of Mechanical Contacts, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2324693              

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Free keywords: Advanced high strength Steel; Atoms; Carbides; Cryogenics; Deuterium; Ferrite; Hydrogen embrittlement; Pearlite; Probes, Atom probe tomography; Catastrophic failures; Cryogenic preparation; Cryogenic vacuum; Engineering parts; Pearlitic steels; Quantitative imaging; State of the art, High strength steel
 Abstract: Observing solute hydrogen (H) in matter is a formidable challenge, yet, enabling quantitative imaging of H at the atomic-scale is critical to understand its deleterious influence on the mechanical strength of many metallic alloys that has resulted in many catastrophic failures of engineering parts and structures. Here, we report on the APT analysis of hydrogen (H) and deuterium (D) within the nanostructure of an ultra-high strength steel with high resistance to hydrogen embrittlement. Cold drawn, severely deformed pearlitic steel wires (Fe–0.98C–0.31Mn–0.20Si–0.20Cr–0.01Cu–0.006P–0.007S wt, ε=3.1) contains cementite decomposed during the pre-deformation of the alloy and ferrite. We find H and D within the decomposed cementite, and at some interfaces with the surrounding ferrite. To ascertain the origin of the H/D signal obtained in APT, we explored a series of experimental workflows including cryogenic specimen preparation and cryogenic-vacuum transfer from the preparation into a state-of-the-art atom probe. Our study points to the critical role of the preparation, i.e. the possible saturation of H-trapping sites during electrochemical polishing, how these can be alleviated by the use of an outgassing treatment, cryogenic preparation and transfer prior to charging. Accommodation of large amounts of H in the under-stoichiometric carbide likely explains the resistance of pearlite against hydrogen embrittlement. © 2020 Acta Materialia Inc.

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Language(s): eng - English
 Dates: 2020-04-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.actamat.2020.02.004
 Degree: -

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Title: Acta Materialia
  Abbreviation : Acta Mater.
Source Genre: Journal
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Affiliations:
Publ. Info: Kidlington : Elsevier Science
Pages: - Volume / Issue: 188 Sequence Number: - Start / End Page: 108 - 120 Identifier: ISSN: 1359-6454
CoNE: https://pure.mpg.de/cone/journals/resource/954928603100