TY - GEN
T1 - Modelling dilatometry data of isothermal ω-phase formation in a strongly β-stabilised TiV-alloy
AU - Enzinger, Robert Josef
AU - Luckabauer, Martin
AU - Ichitsubo, Tetsu
AU - Würschum, Roland
PY - 2021
Y1 - 2021
N2 - In the most relevant technical β-titanium alloys, the extensive formation of the metastable ω-phase during common heat treatments has been a long-standing problem due to the deteriorating effect of this phase on the material properties. By means of dilatometry, the formation of the isothermal ω-phase has been investigated during ageing a Ti-21at.-%V-sample at 300 °C. A model has been developed, which allows to quantitatively correlate the maximum length changes appearing upon ageing to changes occurring at the microscopic scale, i.e. variations of the lattice constants, phase fractions and concentrations of vanadium in the phases appearing. The length change predicted by the model is in very good accordance with the data measured paving the way for further kinetic discussion and ultimately for deriving kinetic parameters.
AB - In the most relevant technical β-titanium alloys, the extensive formation of the metastable ω-phase during common heat treatments has been a long-standing problem due to the deteriorating effect of this phase on the material properties. By means of dilatometry, the formation of the isothermal ω-phase has been investigated during ageing a Ti-21at.-%V-sample at 300 °C. A model has been developed, which allows to quantitatively correlate the maximum length changes appearing upon ageing to changes occurring at the microscopic scale, i.e. variations of the lattice constants, phase fractions and concentrations of vanadium in the phases appearing. The length change predicted by the model is in very good accordance with the data measured paving the way for further kinetic discussion and ultimately for deriving kinetic parameters.
KW - Dilatometry
KW - Isothermal ω-phase formation
KW - Spinodale decomposition
KW - Titanium-vanadium alloy
KW - β-stabilised titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=85100909659&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.1016.1851
DO - 10.4028/www.scientific.net/MSF.1016.1851
M3 - Conference contribution
AN - SCOPUS:85100909659
SN - 9783035736304
T3 - Materials Science Forum
SP - 1851
EP - 1856
BT - THERMEC 2021 - International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications
A2 - Ionescu, Mihail
A2 - Sommitsch, Christof
A2 - Poletti, Cecilia
A2 - Kozeschnik, Ernst
A2 - Chandra, Tara
PB - Trans Tech Publications Ltd
T2 - International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications, THERMEC 2021
Y2 - 10 May 2021 through 14 May 2021
ER -