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Metals 2016, 6(1), 11; doi:10.3390/met6010011

Influence of Loading Rate on the Hydrogen-Assisted Micro-Damage in Bluntly Notched Samples of Pearlitic Steel

Fracture & Structural Integrity Research Group, University of Salamanca, 37008 Salamanca, Spain
These authors contributed equally to this work.
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Academic Editor: Recep Avci
Received: 30 October 2015 / Revised: 21 December 2015 / Accepted: 25 December 2015 / Published: 4 January 2016
(This article belongs to the Special Issue The Role of MnS Inclusions in the Localized Corrosion of Carbon Steel)
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Abstract

The influence of loading rate (crosshead speed) on the fracture process of bluntly notched samples of pearlitic steel under hydrogen environment is analyzed in this paper. Results indicate that the location of the zone where fracture initiates (fracture process zone) in pearlitic steel samples with a blunt notch directly depends on the loading rate or crosshead speed. For slow testing rates, such a zone is placed in the specimen center due to hydrogen diffusion towards the prospective fracture places located in the central area of the section. On the other hand, in the case of high testing rates, the process of hydrogen-assisted fracture initiates near the sample periphery, i.e., in the vicinity of the notch tip, because in such quick tests hydrogen does not have enough time to diffuse towards inner points of the specimen. View Full-Text
Keywords: pearlitic steel; notched samples; constraint; crosshead speed; hydrogen-assisted fracture; micro-fracture maps pearlitic steel; notched samples; constraint; crosshead speed; hydrogen-assisted fracture; micro-fracture maps
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Toribio, J.; Vergara, D.; Lorenzo, M. Influence of Loading Rate on the Hydrogen-Assisted Micro-Damage in Bluntly Notched Samples of Pearlitic Steel. Metals 2016, 6, 11.

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