METHOD OF SELECTING TITANIUM ALLOY FOR ULTRASONIC WAVEGUIDE Russian patent published in 2018 - IPC H01P11/00 G01N29/04 

FIELD: metallurgy.

SUBSTANCE: method of selecting a titanium alloy for an ultrasonic waveguide comprises steps of determining mechanical and physical properties and structure of the alloys. The tensile strength σ_B, the yield point σ_0.2, the speed of sound in two mutually perpendicular directions are determined, and the alloy c is selected with: tensile strength of not less than 1200 MPa, ratio of σ_0.2/σ_B in the range 0.9 -0.95, speed of sound is not less than 6150 m/s in both directions and difference of velocities of not more than 50 m/s, fine-grained microstructure with grain size of (0.5-5.0) mcm, containing equiaxed α-phase in amount of (40-80)% in transformed β-matrix without presence of uninterrupted network of α-phase at boundaries of β grains.

EFFECT: increased efficiency of ultrasonic waveguides for ultrasonic welding.

2 cl, 2 tbl