Fatigue crack growth behaviour of forged Ti-6Al-4V in gaseous hydrogen
Artikel i vetenskaplig tidskrift, 2014

Fatigue crack growth (FCG) tests were performed to evaluate the fatigue behaviour of forged Ti-6A1-4V in air and high-pressure gaseous hydrogen (15 MPa) at room temperature. The results indicate that the effect of gaseous hydrogen is dependent on the stress intensity factor (ΔK). The FCG rate was unaffected by hydrogen below a critical stress intensity, ΔK * ≈ 20 MPa√m. Above ΔK *, the FCG rate fluctuated and subsequently accelerated at higher ΔK values. The observed behaviour is attributed to the change in the fracture processes. A hypothesis is proposed that describes the FCG behaviour in gaseous hydrogen. © 2013 Elsevier Ltd. All rights reserved.

B. SEM

A. Titanium

C. Hydrogen embrittlement

Författare

R. Gaddam

R. Pederson

Magnus Hörnqvist

Chalmers, Teknisk fysik, Materialens mikrostruktur

M.L. Antti

Corrosion Science

0010-938X (ISSN)

Vol. 78 378-383

Ämneskategorier

Annan teknik

Annan materialteknik

Styrkeområden

Materialvetenskap

DOI

10.1016/j.corsci.2013.08.009

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Senast uppdaterat

2018-10-15