Elastic constants of β-Ti15Mo

In-situ investigation of phase transformations in ultra-fine grained Ti15Mo alloy

“…At room temperature, both materials consist of a mixture of β+ωath phases (although small α content was observed in the HPT-deformed condition) as proved in several studies of the non-deformed material [9,27,40,41]. During linear heating, the content of ωath phase decreases in both conditions which is manifested by decreasing intensity of the {112}ω peak in Figure 1 [49].…”

“…The evolution of phase fractions evaluated from the Rietveld fit for the non-deformed and the HPT-deformed condition is shown in Figure 4(a) and (b), respectively. The evolution of phase content in Ti15Mo alloy during heating has been studied in several previous studies [22,26,27,40,41]. Initial decrease of content of ωath phase is followed by significant increase of content of ω isothermal (ωiso) reaching a maximum at around 450 °C.…”

Elastic constants of Ti-15Mo single crystals and their evolution with thermal treatment

“…If the studied material is considered as a mixture of cubic β matrix and isotropic ω particles, the obtained sets of elastic constants enable estimation of volume fractions of isothermal ω particles in the examined samples. Using the Hill's averaging scheme described in [12] and the effective room temperature elastic constants of isothermal ω particles from [12], the RUS results give approximately 52 % and 54 % volume fractions for the 300 °C/4h and 300°C/800MPa/6h samples, respectively, and 57 % for the 300°C/167h sample. The method of ω volume fraction estimation from shear elastic constants is in detail described in our previous work [12].…”

“…Using the Hill's averaging scheme described in [12] and the effective room temperature elastic constants of isothermal ω particles from [12], the RUS results give approximately 52 % and 54 % volume fractions for the 300 °C/4h and 300°C/800MPa/6h samples, respectively, and 57 % for the 300°C/167h sample. The method of ω volume fraction estimation from shear elastic constants is in detail described in our previous work [12]. The samples used for purpose of the study were checked by TEM to prove that only β and ω phases are present.…”