Research of phase transformations in titanium and titanium alloys by ultrasonic method

Experimental researches of the acoustic properties of titanium materials at the broad temperature range are demonstrated in this paper. Sound velocity (C) and damping factor (a) were investigated. These physical characteristics of materials contain extensive information of structural, magnetic and other transformations in metals and alloys. The researches were carried out with an ultrasonic pulse method [1, 2]. Samples of a pivotal type and removing to the cold zone sensor were used for researching. Velocity of sound describes the forces of atom's interactions that determine rigidity of a material. The damping coefficient characterizes ability of material for irreversible dispersion of elastic strain energy. This parameter allows to define a degree of relaxation of stresses that arises in the grain boundaries while polymorphic transforming, ferromagneting, etc. [3].