Thermal expansion evolution of metastable β Ti-15Mo alloy during linear heating

5th International Conference Recent Trends in Structural Materials

Zháal, P.^1,2 ; Beran, P.^3 ; Hansen, T.^4 ; Šmilauerová, J.^1 ; Stráský, J.^1 ; Janeek, M.^1 ; Harcuba, P.^1

Department of Physics of Materials, Charles University, Ke Karlovu 5, Prague

12116, Czech Republic^1

Research Center Rez., Ltd., Hlavni 130, Husinec-e

25068, Czech Republic^2

Department of Neutron Physics, Nuclear Physics Institute CAS, Hlavni 130, Husinec-e

25068, Czech Republic^3

Institut Laue-Langevin, BP 156, Grenoble Cedex 9

38042, France^4

关键词: Beta-phase;    Complete dissolution;    Increasing temperatures;    Linear heating;    Metastable beta-titanium alloys;    Omega phase;    Situ powders;    Thermal expansion measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/461/1/012094/pdf
DOI  :  10.1088/1757-899X/461/1/012094

来源: IOP

【 摘 要 】

Thermal expansion measurement was employed for characterization of phase transformations occurring in metastable β titanium alloy (Ti-15Mo) during linear heating with three different heating rates. Effects of the transformations on materials dimensions is discussed and compared with changes of lattice parameters of present phases obtained from in-situ powder neutron diffraction. The shrinkage of the material with increasing temperature at about 300 °C was attributed to the decrease of lattice parameter of β phase, which occurs due to diffusion of alloying elements out of ω phase. Complete dissolution of ω phase was detected at 560 °C regardless of the heating rate.