Fatigue Behavior of Titanium Alloys under Very High Cycle Fatigue Loading

Resumo

New test results for samples of the titanium alloy VT3-1 in the region of very high cycle fatigue at the loading frequency of 20 kHz are obtained. Using the metallographic analysis on the sections of the compressor disk from which samples were made to study the stamped material, significant heterogeneity in the distribution of two-phase plate structure is revealed. At the asymmetry of the cycle R =–1, the behavior of the extruded and stamped material differs little from each other, and at the asymmetry of the cycle R = 0.1, the extruded material has better fatigue characteristics. The compressing part of the cycle balances the effect of structural heterogeneity on the accumulation of defects in VT3-1 alloy.