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Conference Paper

Rate effects on the estimation of fracture toughness by small punch tests in hydrogen embrittlement scenarios

Authors:

B. Arroyo ,

LADICIM, Universtiy of Cantabria, Avda. Los Castros 44, 39005, Santander, Cantabria, Spain
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J.A. Álvarez,

LADICIM, Universtiy of Cantabria, Avda. Los Castros 44, 39005, Santander, Cantabria, Spain
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R. Lacalle,

LADICIM, Universtiy of Cantabria, Avda. Los Castros 44, 39005, Santander, Cantabria, Spain; INESCO INGENIEROS, CDTUC Módulo 9, Avda. Los Castros 44, 39005, Santander, Cantabria, Spain
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F. Gutiérrez-Solana

LADICIM, Universtiy of Cantabria, Avda. Los Castros 44, 39005, Santander, Cantabria, Spain
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Abstract

In this paper, different techniques to test notched Small Punch (SPT) samples for the estimation of the fracture properties in aggressive environments are studied, based on the comparison of the micromechanisms at different rates. Pre-embrittled samples subsequently tested in air at conventional rates (0.01 and 0.002 mm/s) are compared to embrittled ones tested in environment at the same rates (0.01 and 0.002 mm/s) and at a very slow rate (5E-5 mm/s); a set of samples tested in environment under static loads that produce very slow rates complete the experimental results. As a conclusion, is recommended to test SPT notched specimens in environment at very slow rates, of around E-6 mm/s, when characterizing in Hydrogen Embrittlement (HE) scenarios, in order to allow the interaction material-environment to govern the process.
How to Cite: Arroyo, B., Álvarez, J.A., Lacalle, R. and Gutiérrez-Solana, F., 2018. Rate effects on the estimation of fracture toughness by small punch tests in hydrogen embrittlement scenarios. Ubiquity Proceedings, 1(S1), p.6. DOI: http://doi.org/10.5334/uproc.6
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Published on 10 Sep 2018.
Peer Reviewed

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