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Showing 1 to 11 of 11 for “"Ni-based superalloy"”.
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Deformation mechanisms in a polycrystalline Ni-based superalloy
… window extends into a new deformation mechanism regime that needs to be explored and understood to be able to design and optimise new and existing Ni-based disc superalloys. For this purpose, this work investigates the deformation behaviour of the established coarse-grained RR1000 alloy …
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Compositional Optimisation of a Ni-based Superalloy for Additive Repair Applications
… manufacturing (AM) for the fabrication of Ni-based alloys has seen a massive uptake in commercial institutions. Among their many merits, AM techniques offer a unique route for the repair of a wide range of complex components. However, processing of the Ni-based superalloys used by the …
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The Role of Slip System Activation on Ni-Based Superalloy High Temperature Fatigue
<p>Nickel-based superalloys are used extensively in the aviation industry, particularly in aircraft engine components. These materials are desirable due to their high strength, resistance to creep, corrosive environment, and high temperature. It has been well documented that material fatigue is …
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Metallographic study of gamma - gamma prime structure in the Ni-based superalloy GTD111
The potential for land-based turbine buckets material rejuvenation presents a significant commercial and scientific interest. Ni-based superalloy GTD111 is used at a number of GE-manufactured power generation turbines. The outstanding creep resistance features of Ni-based superalloys can be …
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Thermo-mechanical response and plastic deformation behavior of Hastelloy X at elevated temperatures — role of dynamic strain aging
… behavior of Hastelloy X subjected to thermo-mechanical loading is investigated, and the phenomenon of dynamic strain aging is studied under isothermal and temperature jump experiments, using the technique of digital image correlation (DIC). The material of interest, a Ni-based superalloy, is …
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Grain boundary engineering in additively manufactured polycrystalline materials
… produce complex near-net-shape components with minimal material waste. Grain boundary engineering (GBE) is a well-established approach for enhancing mechanical properties and reducing corrosion susceptibility in polycrystalline materials by increasing the fraction of low-energy grain boundaries. …
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Improving Oxidation Resistance in Polycrystalline Ni-based Superalloys for High-Temperature Applications
The design of new polycrystalline Ni-based superalloys with enhanced oxidation resistance can enable higher operating temperatures in aeroengines with increased fuel efficiencies and minimised CO₂ emissions. This thesis investigated the oxidation behaviour in polycrystalline Ni-based superalloys …
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The Effect of Superimposed Stress on High Temperature Degradation of Single Crystal Superalloys during Exposure to Various Sulphur and Sea Salt Environments
… root of the single crystal turbine blades, can initiate hot corrosion. Low temperature Type II corrosion consists of the formation of a fused salt melt, which interacts with the combustion gases and causes other constituents of the alloy to dissolve. The resulting melt prevents the oxide to be …
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Factors contributing to the yield strength of polycrystalline nickel-based superalloys
Nickel-based superalloys are the material of choice for use in the hottest regions of gas turbine engines due to their inimitable mechanical properties, in particular, high temperature strength. As we become increasingly aware of the environmental consequences of air travel, manufacturers are …
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High temperature creep-fatigue behavior of alloy 617 and alloy 230
… in-core and out-of-core applications. Currently, Ni-based superalloy alloy 617 (Inconel 617) and alloy 230 (Haynes 230) are considered as the leading metallic candidate materials for applications in the VHTR because of their favorable mechanical properties at elevated temperatures. The major …
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Powder bed fusion of Ni-based superalloys: process optimization, heat treatments and mechanical performance
L'abstract è presente nell'allegato / the abstract is in the attachment