Damping Capacity of Coated Plane VT6 Titanium Alloy Samples

Abstract

The damping capacity of a VT6 titanium alloy sample is shown to depend on the thickness of a new designed Al–Ni–Y alloy coating during vibrodynamic tests at the first flexural mode resonance frequency. The coating 20–100 μm thick is found to decrease the vibrostresses in the weakest section of the sample by 9–31% at a temperature of 20°C and by 40.6% at a temperature of 400°C and a coating thickness of 60 μm. The dependences of the damping capacity of the alloy–coating composition on high-temperature holding of coated samples in an atmospheric furnace (t = 400°C, τ = 500 h), the salt fog chamber conditions (t = 35°C, τ = 3 months), and the action of an abrasive flux (quartz sand, average particle fraction of 400 μm, particle velocity of 100 m/s) are studied.