• Šmilauerová, Jana

Abstract

<jats:p>Phase transitions in a single crystal of a metastable β-titanium alloy (Ti-15Mo) were investigated <jats:italic>in situ</jats:italic> during heating by synchrotron X-ray diffraction. The results were compared with previous measurements of electrical resistance. Single-crystalline samples allowed different crystallographic families of ω-Ti and α-Ti phases to be distinguished. The observed evolution of the intensity of the reflections of the ω phase during heating is consistent with the evolution of electrical resistance, which proves that the resistance is affected by the presence of ω-phase particles. Between approximately 673 and 833 K, both the resistance and the intensity of ω peaks sharply decrease. At 833 K, ω reflections disappear, indicating a complete dissolution of the ω phase due to achieving the solvus temperature of the ω phase in the Ti–15Mo alloy. The synchrotron X-ray diffraction experiment proved that the disappearance of the ω phase during heating of Ti–15Mo with a heating rate of 5 K min<jats:sup>−1</jats:sup> occurs by its dissolution back to the β phase and not by ω → α transformation.</jats:p>

Topics

• impedance spectroscopy
• single crystal
• phase
• x-ray diffraction
• experiment
• phase transition
• titanium
• titanium alloy