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Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717
Print version ISSN 0038-223X

J. S. Afr. Inst. Min. Metall. vol.111 n.3 Johannesburg  2011




Microstructure evolution in Ti-6Al-4V alloy during hydrogen dosing at elevated temperature



L.A. Matthews; R.D. Knutsen

Centre for Materials Engineering, Mech Eng, University of Cape Town




The embrittlement of the Ti-6Al-4V alloy by hydrogen dosing at elevated temperature has been investigated. Metal coupons were subjected to isothermal treatments in a partial hydrogen atmosphere in the temperature range from 650ºC-950ºC and the degree of embrittlement after treatment was determined by dropweight impact testing. Embrittlement was found to be inversely related to reaction temperature as a result of the combined effects of greater hydrogen absorption and titanium hydride precipitation at the lower isothermal temperatures.

Keywords: Titanium, hydrogen embrittlement, impact energy



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1. TAL-GULTELMACHER, E. and ELIEZER, D. High fugacity hydrogen effects at room temperature in titanium based alloys. Journal of Alloys and Compounds, vol. 613, 2005, pp. 404-406.         [ Links ]

2. MITKOV, M. and BOZ˘I´C, D. (1996) Hydride-Dehydride conversion of Solid Ti6Al4v to Powder Form. Materials Characterisation, vol. 37, 1996, pp. 53-60.         [ Links ]

3. TAL-GULTELMACHER, E. and ELIEZER, D. The Hydrogen Embrittlement of Titanium-Based Alloys. Journal of the Minerals, Metals and Materials Society, vol. 57, 2005, pp. 46-49.         [ Links ]

4. SENKOV, O.N. and FROES, H.F. (1999) Thermohydrogen processing of titanium alloys. International Journal of Hydrogen Energy, vol. 24, 1999, pp. 565-576.         [ Links ]

5. QAZI, J.I., SENKOV, O.N., RAHIM, J., GENC, A., and FROES, F.H. Phase Transformations in Ti-6Al-4V-xH Alloys. Metallurgical and Materials Transactions, vol. 32A, 2001, pp. 2453-2463.         [ Links ]

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