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Showing 1 to 10 of 10 for “"Nickel-Based Alloys"”.
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Transient Liquid Phase Bonding of Titanium-, Iron- and Nickel- Based Alloys
<p>The operating temperature of land-based gas turbines and jet engines are ever-increasing to increase the efficiency, decrease the emissions and minimize the cost. Within the engines, complex-shaped parts experience extreme temperature, fatigue and corrosion conditions. Ti-based, Ni-based and …
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Microstructural evolution and mechanical behavior in nickel based alloys for very high temperature reactor
… the fundamental deformation mechanisms of the alloys and their long-term degradation process during thermal aging. First, mechanical properties of both alloys were studied by performing tensile tests at three different strain rates and at temperatures up to 1000ºC. This range covers …
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In search of martensite : titanium-tantalum shape-memory alloy
… (SME) and superelastic properties of various nickel-based alloys [8]. Unfortunately, there is also serious concern about the toxicity of nickel. Titanium based shape-memory alloys have been noted as potentially non-toxic replacements of the more traditional, nickel-based shape memory alloys. …
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Hydrogen embrittlement in nuclear and bearing applications: from quantum mechanics to thermokinetics and alloy design
Hydrogen embrittlement in ferrous and non-ferrous alloys is, and has been for over a century, a prominent issue within many sectors of industry. Despite this, the mechanisms by which hydrogen embrittlement occurs and the suitable means for its prevention are yet to be fully established. As hydrogen …
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An Exploration of the Effect of Temperature on Different Alloys in a Supercritical Carbon Dioxide Environment
… in a SCO₂ environment A total of 7 different alloys, 6 nickel based and 1 austenitic stainless steel (AUSS), were examined in three sets of experiments. The experiments exposed the specimens to SCO₂ at temperatures ranging from 650 "C to 750 °C, pressures from 12.5 to 20 MPa, and for durations …
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Characterization Of Evaporative Metal Bonding In Superalloys For Use In Gasified Coal Turbine Generators
… of evaporative metal bonding. In addition, the nickel based alloys, CM247LC and Rene 80, had diffusion coefficients that approached theoretical diffusion coefficients of zinc in pure nickel. The finite element model showed stress distributions that qualitatively agreed with those reported in …
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Metal Dusting of Heat-Resistant Alloys
Metal dusting leads to disintegration of such alloys as iron and nickel-based into a “dust” of particulate metal, metal carbide, carbon, and/or oxide. It occurs in strongly carburising environments at 400-900°C. Literature survey has shown that alloys behave differently in metal dusting conditions …
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Determining Optical Basicity of Molten Chloride Salts for Solar Thermal Applications
… can corrode the storage materials, typically nickel-based alloys, causing ruptures and subsequent plant shutdowns. In aqueous systems, pH can be a predictor of corrosion, but the non-aqueous, harsh environment of molten chlorides makes pH measurements irrelevant. Alternative basicity metrics, …
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Material Degradation Studies in Molten Halide Salts
… the corrosion characteristics of several nickel and ferrous-based alloys in the molten KCl-MgCl2-NaCl salt. The average mass-loss was in the increasing order of C276 < SS316L < 709-RBB* < IN718 < H230 < 709-RBB < 709-4B2. The corrosion process was driven by the outward diffusion of …
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Species Chemistry and Electrochemical Separation in Molten Fluoride Salt
… containment material of the molten salt such as nickel-based alloys may be corroded, and its species may stay in the salt. Thus, the installment of the primary coolant clean-up system and the study on the contaminant species' chemistry and separation are necessarily needed. Electrochemical …