TRANSACTION PAPER

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

SYNOPSIS

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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References

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