Application of advanced materials to aircraft gas turbine engines

Johnson, A. W.; Wright, Paul

doi:10.2514/6.1990-2281

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…Titanium matrix composites (TMCs) possess specific stiffness, high specific strength and good fatigue resistance [1], which make them candidate materials for high-speed aerospace vehicles and the next generation of advanced aircraft engines [2][3][4]. Among the methods to produce TMCs, the in-situ synthesized technology is attractive due to their simplicity, economy and flexibility [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Argon Arc Welding Parameters on Properties of Thin Plate of <i>In Situ</i> Titanium Matrix Composites

Mao

Han

Lü

et al. 2016

MSF

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The weldability of in-situ titanium matrix composites (TMCs) was studied using the gas tungsten arc welding (GTAW). The effects of GTAW on the microstructure of fusion zone and heat-affected zone were discussed, and the changes of TiB whisker reinforcements in the welded joint were investigated by optical microscope (OM), scanning electron microscopy (SEM), XRD analysis and tension testing at room temperature. Research results show that the GTAW process is a suitable welding method for in-situ TMCs. Under reasonable welding parameters, the welded joints display goo weld seam formation, and TiB whiskers show distinctly smaller sizes and uniform distribution with a special network structure. The maximum tensile strength of welded joints can reach 92% of the base metal under optimum welding parameters.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Argon Arc Welding Parameters on Properties of Thin Plate of <i>In Situ</i> Titanium Matrix Composites

Mao

Han

Lü

et al. 2016

MSF

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“…Discontinuously reinforced titanium composites, while offering more modest, yet still substantial property improvements, are more affordable and have been identified for many aircraft and aerospace applications. 14 In-situ TiB-reinforced titanium alloy composites have been produced by the ~ McDonnell Douglas Corporation by rapid solidification processing (RSP),15 and more recently by conventional ingot metallurgy (IM) techniques. These composites are formed by elemental additions of boron to the matrix alloy in the molten state.…”

Section: Introductionmentioning

confidence: 99%

Preparing damage-tolerant titanium-matrix composites

Lederich

Soboyejo

Srivatsan

1994

JOM

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In-situ TiB-reinforced titanium alloy composites have been produced by both rapid solidification and ingot metallurgy techniques. The reinforcements have been shown to result in strength and modulus improvements, improved fracture toughness, increased fatigue endurance limit, and better fatigue crack growth and creep resistance than conventional monolithic titanium alloys. In addition to improved mechanical properties, in-situ composite structures and components with complex shapes can be fabricated using conventional ingot metallurgy, near-net shape forming techniques. ACKNOWLEDGEMENTS Research described here was funded by the McDonnell Douglas Independent Research and Development program and by the OhioAerospace Institute. Appreciation is also extended to J.D. Keyes, J.J. Evans, and DI Deuser for assistance with experimental/ processing techniques.

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“…Besides, it is interesting to note that the density of TMCs is only half that of the contending nickel-base alloys [16]. There have been many potential applications for TMCs in areas spanning from aerospace to automotive engineering [17]. Integrally bladed compressor rings, shafts, ducts, fan components and structural rods are but a few of the components for which the use of TMCs has been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…Integrally bladed compressor rings, shafts, ducts, fan components and structural rods are but a few of the components for which the use of TMCs has been proposed. Titanium-based composites have been envisioned for the aircraft skin, internal structure and cool engine parts of future commercial and military aircraft [18], and for components of the exhaust nozzle of the High Speed Civil Transport Aircraft [HSCT] [ 17,18]. The Toyota Motor Corporation has utilized discontinuously-reinforced titaniummatrix composites [DRTMCs] for the manufacture of exhaust and intake valves, connecting rods and other automobile engine components [19].…”

Section: Introductionmentioning

confidence: 99%

Deformation and fracture properties of damage tolerant in-situ titanium matrix composites

1997

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Abstract. This paper discusses the tensile response and fracture toughness of in-situ titanium alloy metal matrices discontinuously-reinforced with whiskers of titanium boride which were successfully produced by ingot metallurgy techniques. Additions of elemental boron resulted in a near uniform dispersion of the rod-like titanium boride (TiB) reinforcements in the alloy matrix. Such composites have engendered considerable scientific and technological interest due to their attractive combinations of improved mechanical properties and low manufacturing cost. The improved elastic moduli of the composites are explained using shear lag and rule-of-mixtures theories. The increased strengths of the in-situ composites are rationalized by considering the combined effects of deformation restraints imposed by the stiff whiskers and strengthening contributions arising from the substructure that evolves from the presence of additional dislocations.

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Application of advanced materials to aircraft gas turbine engines

Cited by 4 publications

References 7 publications

Investigation of the Effect of Argon Arc Welding Parameters on Properties of Thin Plate of <i>In Situ</i> Titanium Matrix Composites

Investigation of the Effect of Argon Arc Welding Parameters on Properties of Thin Plate of <i>In Situ</i> Titanium Matrix Composites

Preparing damage-tolerant titanium-matrix composites

Deformation and fracture properties of damage tolerant in-situ titanium matrix composites

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