Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 80 for “"Inconel"”.
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Fatigue and fracture in Inconel 718-copper-Inconel 718 explosion-bonded composites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Microstructure and precipitation effects in inconel alloy 600.
The main objectives of the project were to investigate the interactions of carbon, titanium and aluminium contents, grain size and cold working, with precipitation reactions which occur during heat treatments similar to those experienced as a consequence of commercial PWR Steam Generator (SG) tube …
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Modelling of the inertia welding of Inconel 718
In this study, the inertia welding process was studied by both an FEM model and three analytical models. The thermal analysis shows that there is a steep temperature gradient near the mating surface, which is the cause for the existence of a band of high hydrostatic stress near the weld line. The …
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Irradiation induced damage in CANDU spacer material Inconel X-750
Inconel alloys are commonly used as structural materials in nuclear reactors. One of these alloys, the Inconel X-750, is a γ’ Ni3(Al, Ti) strengthened superalloy extensively used in the cores of reactors, such as spacers in CANada Deuterium Uranium (CANDU) fuel channels. Prior to their application …
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High temperature creep behavior of Inconel 617 and Haynes 230
… a design life of 60 years. Currently, Ni-based Inconel 617 (Alloy 617) and Haynes 230 (Alloy 230) are considered to be the leading metallic candidate materials for applications in the HTGR due to their favorable mechanical properties at high temperatures. In the present study, focus is placed on …
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Fretting fatigue Behaviour of Inconel 718 at room and high Temperature
This thesis analyses the fatigue behaviour of Inconel 718, a Nickel-Chromium-based superalloy known for its excellent mechanical properties and high resistance to corrosion and oxidation, even at elevated temperatures. The study combines experimental testing and numerical simulations in order to …
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Investigation of die wear by modelling the extrusion of Inconel 718
… quantifying wear occurring in the extrusion of INCONEL 718 (IN718), nickel superalloy. To characterise wear, the process prediction which contributes to it must be identified and quantified. First, material characterisation was carried out using the Gleeble physical materials simulator. Then a …
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Relationship of grain boundary structure and mechanical properties of Inconel 690
… in the resistance to stress corrosion cracking. Inconel 690, an austenitic Ni-alloy, was chosen as the material of interest for its relevance in current applications in the nuclear energy technology. An integrated approach to probe the structural, mechanical and chemical information at the …
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Sestavení technologie rotační součásti z materiálu Inconel v podmínkách firmy Frencken Brno.
… popsány základní vlastnosti obráběného materiálu Inconel. V druhé části je obsažen postup výroby a volba nástrojové sady. V závěru jsou vysvětleny stěžejní části NC programu.
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Investigation into laser re-melting of inconel 625 HVOF coating blended with WC
… The differences in the thermal properties of Inconel 625 powders and WC particles result in formation of small size cellular structure through polyphase solidification. WC dissolution in the central region of the large polycrystalline cells is observed due to the loss of carbon through …
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Surface degradation and creep of Inconel 617 and Haynes 230 at high temperatures
… the design and long-term operation of the HTGR. Inconel 617 (alloy 617) and Haynes 230 (alloy 230) are considered as primary candidate materials for serving in the HTGR, due to their exceptional combination of high temperature strength and oxidation resistance. In this study, surface degradation …
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Chemical and structural analysis of grain boundaries in Inconel 690 for corrosion resistance
… for to the longevity of the reactor components. Inconel 690 (alloy 690 UNS N06690) is an alloy that has been put into service in the nuclear industry over the past 20 years due to its relatively good resistance to SCC. A new generation of nuclear plants is likely to be built in the US and the …
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A comparison of fatigue crack propagation in Inconel 625 and 3.25 Ni steel.
Massachusetts Institute of Technology. Dept. of Ocean Engineering. Thesis. 1972. Ocean E.
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Direct Growth of Carbon Nanotubes on Inconel Sheets Using Hot Filament Chemical Vapor Deposition
… method was adopted in direct growth of CNTs on Inconel 600 plates and proved effective. The effect of oxidation temperature on the growth of CNTs was studied. It was found that the oxidation temperature had an influence on CNT height uniformity and FEE properties: the higher the treatment …
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Surface integrity and energy consumption in machining of inconel 718 produced by selective laser melting
The development of additive manufacturing (AM) in the past decade has brought along with it a number of new opportunities and challenges when it comes to how parts are manufactured. While this development represents an increase in the capabilities and performance of the AM parts, much work and …
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A Correlation of Microstructure With Hot-Ductility in the Heat-Affected Zone of Inconel 718.
Increased performance requirements for structural components and the demand for materials with enhanced properties have significantly increased the problems involved in producing sound welds. Due to the high temperatures and steep temperature gradients in the vicinity of welds, high stresses and …
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Ultrasonic Attenuation In As-Deposited Inconel 182 Weld Metal and Recommended Techniques for Discontinuity Evaluation.
This thesis reports on a study of the problems associated with the ultrasonic evaluation of full penetration welds in pressure retaining bi-metallic and tri-metallic joints involving as-deposited austenitic weld material. The weld joint design was one simulating a component on a nuclear reactor …
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3D characterization of oxidation and crack propagation in Inconel 617 fatigue and creep-fatigue tests
Includes bibliographical references (pages 64-69).
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A Quantitative Study of the Weldability of Inconel 718 Using Gleeble and Varestraint Test Methods
<p>Nickel super alloy Inconel 718 was tested and compared to Haynes 230 using Gleeble and Varestraint mechanical test methods. Hot cracking susceptibility was examined in either alloy using a sub-scale Varestraint test method at 5 augmented strain levels: 0.25%, 05.%, 1%, 2%, and 4%. Maximum crack …
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