Towards a Study of Effects on Hydrogen Diffusion into T40 Titanium Alloys

Abstract:

In a global study of titanium alloys behavior in specific aqueous solution (embrittlement, corrosion and corrosion under stresses), the present work focuses on hydrogen diffusion into the metal and the consequences on its microstructure. Two ways of hydrogen charging were used to investigate this issue (gaseous and cathodic charging). The final aim is to determine a fitted method to create an identified microstructure and then to perform accelerated aging tests of titanium U-Bend samples into an autoclave with a specific environment. Hydrogen absorption and formation of titanium hydride have been studied by SEM analyses and by X-ray diffraction methods.

• Periodical: Defect and Diffusion Forum (Volume 365)
• Pages: 272-277
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.365.272
• Online since: July 2015
• Authors: Steeve Dejardin, Vincent Duquesnes, Nicolas Creton, Igor Bezverkhyy, Tony Montesin, Roland Oltra
• Keywords: Hydride, Hydrogen Charging, Hydrogen Diffusion, T40 Titanium Alloy

References

[1] Haag R.M., Shipko F.J.: The titanium - hydrogen system. J. Amer. Chem. Soc. 78 (1965), pp.5156-5159.

[2] Philips I.I., Poole P., Shreir L.L.: Hydride formation during cathodic polarization of Ti – I. Effect of current density on kinetics of growth and composition of hydride. Corrosion Sci. 12 (1972), pp.855-866.

DOI: 10.1016/s0010-938x(72)80014-3

[3] Borchers C.H., Leonov A.V., Khomrnko T.I., Morozova O.S.: Mechanism and kinetics of mechanically induced transformation of Ti and titanium hydride: Effect of reaction medium on microstructure, morphology and hydrogen-uptake properties. J. Materials Sciences 39 (2004).

DOI: 10.1023/b:jmsc.0000039223.05607.76

[4] Schur D.V., Zaginajchenko S.Y., Adejev V.M., Voitovich V.B., Lyashenkov A.A., Trefilov V.I.: Phase transformation in titanium hydrides. Int. J. Hydrogen Energy 21 (1996), pp.1121-1124.

[5] Irving P.E., Beevers C.J.: Some metallographic and lattice parameter observations on titanium hydride. Metalurg. Trans. 2 (1971), pp.613-615.

DOI: 10.1007/bf02663362

[6] Trefilov V.I., Timofeeva I.I., Klochkov L.I., Morozov I.A., Morozova R.A.: Effects of temperature change and hydrogen content on titanium hydride crystal lattice volume. Int. J. Hydrogen Energy 21 (1996), pp.1101-1103.

DOI: 10.1016/s0360-3199(96)00078-x

[7] Toshio Ogawa, Ken'ichi Yokoyama, Kenzo Asaoka, Jun'ichi Sakai: Distribution and thermal desorption behavior of hydrogen in titanium alloys immersed in acidic fluoride solutions. J. Alloys and Compounds 396 (2005), pp.269-274.

DOI: 10.1016/j.jallcom.2004.12.041

[8] Tal-Gutelmacher E., Eliezer D. : High fugacity hydrogen effects at room temperature in titanium based alloys. J. Alloys and Compounds 404-406 (2005), pp.613-616.

DOI: 10.1016/j.jallcom.2004.12.172

[9] Creton N., Dejardin S., Grysakowski B., Optasanu V., Montésin T. : A mechano-chemical coupling for hydrogen diffusion in metals based on a thermodynamic approach. Defect and Difusion Forum, Vol. 353, (2014).

DOI: 10.4028/www.scientific.net/ddf.353.286

[10] Lunarska ., Chernyayeva O., Lisovytski D. : Hydride formation at cathodic charging of a-Ti , Advances in materials science, Vol. 8, No 1(15), 2008, pp.105-114.

[11] Senkov O.N., Dubois M., Jonas I.J.: Elastic moduli of titanium-hydrogen alloys in the temperature range 200 C to 11000 C. Met. And Mater. Trans. A29 (1996), pp.3963-3970.

DOI: 10.1007/bf02595645

[12] Daigo Setayama, Junji Matsumaga, Hiroaki Muta, Masayohi Uno, Shinsuke Yamanaka : Mechanical properties of titanium hydride, Intern. J. Alloys and Compounds, 381 (2004) pp.215-220.

DOI: 10.1016/j.jallcom.2004.04.073