Application of Ti-alloys as compressor discs and blades
Ti-alloys are widely used as materials for compressor discs, blades, vanes and housings in modern aero-engines due to their excellent strength-to-weight ratio. Their high corrosion resistance and good weldability are additional factors for their application as main compressor components. A variety of different Ti-alloys have been developed in recent years and introduced into jet engines in order to fulfill the large spectrum of required mechanical properties. The main topic of the present paper is to describe the correlation between essential microstructural features of a number of Ti-alloys for compressor disc and blade applications and such mechanical properties as strength, creep and fatigue resistance, fracture toughness, and crack propagation behavior. It will be shown that for different engine requirements the choice of the suitable alloy, as well as tailoring of microstructural features with the aim to achieve an optimized balance of relevant mechanical properties, is necessary. The influence of thermomechanical treatment on morphology and dimensions of phases, and the resulting correlation to mechanical properties, will be discussed in detail for selected Ti-alloys, i.e., Ti-6Al-4V, Ti-6Al-2Sn-4Zr-2Mo and IMI 834 (Ti-5.8Al-4Sn-3.5Zr-0.5Mo-0.7Nb-0.35Si-0.06C). Additionally, effects of surface conditions caused by surface treatment (shot peening) or by service exposure (surface oxidation) will be presented.
- Research Organization:
- MTU Muenchen GmbH (DE)
- OSTI ID:
- 20013330
- Resource Relation:
- Conference: TMS Fall Meeting '98, Symposium on Fatigue Behavior of Titanium Alloys, Chicago, IL (US), 10/11/1998--10/15/1998; Other Information: PBD: 1999; Related Information: In: Fatigue behavior of titanium alloys, by Boyer, R.R.; Eylon, D.; Luetjering, G. [eds.], 382 pages.
- Country of Publication:
- United States
- Language:
- English
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