Microstructural Optimisation of Titanium Alloys for Defect Tolerance in Gas Turbine Engine Components

摘要

Results for aligned and basketweave microstructures in near alpha alloys used on gas turbine engines are presented together with observations titanium alloy. To minimize crack propagation rates, it is important to minimize the prior beta grain size and the level of alpha platelet alignment. The propagation rate depends on the propagation mode which depends on the orientation of the structure presented to the crack tip.