Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717
MATTHEWS, L.A. and KNUTSEN, R.D.. Microstructure evolution in Ti-6Al-4V alloy during hydrogen dosing at elevated temperature. J. S. Afr. Inst. Min. Metall. [online]. 2011, vol.111, n.3, pp. 155-158. ISSN 2411-9717.
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.