Fatigue crack growth behaviour of forged Ti-6Al-4V in gaseous hydrogen
Journal article, 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.
C. Hydrogen embrittlement
A. Titanium
B. SEM
Author
R. Gaddam
R. Pederson
Magnus Hörnqvist Colliander
Chalmers, Applied Physics, Materials Microstructure
M.L. Antti
Corrosion Science
0010-938X (ISSN)
Vol. 78 378-383Subject Categories
Other Engineering and Technologies
Other Materials Engineering
Areas of Advance
Materials Science
DOI
10.1016/j.corsci.2013.08.009