The role of the testing rate on Small Punch tests for the estimation of fracture toughness in hydrogen embrittlement

Abstract: In this paper, different techniques to test notched Small Punch (SPT) samples in fracture conditions in aggressive environments are studied, based on the comparison of the micromechanisms at different rates. Pre-embrittled samples subsequently tested in air at rates conventionally employed (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 a set of constant loads that produce very slow rates completes the experimental results. As a conclusion, it 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.

Otras comunicaciones del congreso o articulos relacionados con autores/as de la Universidad de Cantabria

 Congreso: Virtual European Conference on Fracture VECF1 (1st : 2020)

Editorial: Elsevier B.V.

 Año de publicación: 2020

Nº de páginas: 12

Tipo de publicación: Comunicación a Congreso

 DOI: 10.1016/j.prostr.2020.10.024

ISSN: 2452-3216

Url de la publicación: https://doi.org/10.1016/j.prostr.2020.10.024