| Abstract Scope |
Conventional high temperature Titanium alloys were developed and are evolving further for use at least up to 923K in aeroengine parts like compressor discs, shafts, blades and other parts to reduce weight and fuel consumption. Apart from the matrix bimodal and lamellar microstructures, fine structural changes like the precipitation of silicides and/or Ti3Al or both the phases, metastable β, martensitic crystal structure, dynamic strain aging, texture etc. affect the Low Cycle Fatigue (LCF) resistance of these conventional titanium alloys during service conditions. Two slope behavior in Coffin-Manson plot and the effect of hold and/or dwell period on LCF life have been highlighted. Further, environment on fatigue life has been discussed. These effects could have impact on the performance of the engine parts. Some observations from literature have been noted on the elimination of the two-slope behavior and other efforts to address other factors. |