STUDY OF MECHANICAL ANISOTROPY FORMATION IN ROLLED RING PRODUCTION

Abstract

The effect of titanium alloy mechanical anisotropy on the performance of gas turbine engine (GTE) ring-shaped parts was analyzed with account for their production cycle. Necessary dependencies were provided for transverse strain identification when assessing anisotropy during forming. It was found that both transversal strain coefficients and metal strength increase during the forming process (forging and rolling). In addition, the rolling process facilitates the transversal isotropy occurrence in the ring material. The stress state in a hollow homogenous cylinder under internal and external pressures was examined to evaluate the effect of transverse strain coefficients on the structure functionality. This scheme describes operating conditions of GTE compressor disks spacer with a reasonable degree of certainty while ignoring axial loads. The analysis showed that the allowable internal pressure taken by the spacer increases with the increase of transverse strain coefficients.