Izvorni znanstveni članak

Hydrogen embrittlement of duplex steel tested using slow strain rate test

P. Vaňova ; VŠB - Technical university of Ostrava, FMME, Ostrava, Czech Republic
J. Sojka ; VŠB - Technical university of Ostrava, FMME, Ostrava, Czech Republic

Sažetak

This paper is dealing with hydrogen embrittlement of austenitic-ferritic 2205 duplex steel using the slow strain rate test (SSRT). The original material was subjected to heat treatment under 700 °C during 5 hours and following aircooling with the aim of provoking sigma phase precipitation and embrittlement of the material. The samples of both states were electrolytic saturation with hydrogen in 0,1N solution of sulfuric acid (H₂SO₄) with addition KSCN during 24 hours. The hydrogen embrittlement appeared on fracture surfaces of tested tensile bars as a quasi-cleavage damage on their perimeter. From the established depth of hydrogen charging the diffusion coefficient of hydrogen in duplex steel with ferritic-austenitic structure and with the structure containing the sigma phase as well were estimated.

Ključne riječi

hydrogen embrittlement; duplex steel; diffusion; slow strain rate test (SSRT); sigma phase

Hrčak ID:

110060

URI

https://hrcak.srce.hr/110060

Datum izdavanja:

1.4.2014.

Posjeta: 1.439 *