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

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.

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

 Congreso: International Small Sample Test Techniques Conference (5th : 2018 : Swansea, Reino Unido)

Editorial: Ubiquity Press

 Año de publicación: 2018

Nº de páginas: 14

Tipo de publicación: Comunicación a Congreso

DOI: 10.5334/uproc.6

ISSN: 2631-5602

Proyecto español: MAT2011-28796-C03 ; MAT2014-58738-C3-3- R

Url de la publicación: https://doi.org/10.5334/uproc.6