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 14 of 14 for “"Intergranular Corrosion"”.
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Experimental and ab initio investigations into the fundamentals of corrosion, in the context of supercritical water oxidation systems
… even noble metals and the most advanced alloys. Corrosion in chlorinated, acidic streams at transitional temperatures (100-400° C) in a Hastelloy C-276 tube is examined through post-failure analysis and controlled exposure experiments. Dealloying and intergranular corrosion were observed. …
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The influence of tempering on the corrosion resistance of newly developed steels
… the effect of heat treatment on the localized corrosion resistance of the low carbon, chromium containing steels, designated 825, 102A and 122 which recently have been developed. The potentiodynamic polarization technique has been employed to determine the corrosion characteristics of the three …
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Telluridm-induced corrosion of structural alloys for nuclear applications in molten salts
The mechanism by which tellurium causes intergranular corrosion (IGC) of structural alloys in molten salt reactors is currently poorly understood. Limited corrosion testing has been performed on a few select alloys in simulated reactor conditions. In this thesis, the results of performing 50 h, 100 …
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Effect of stress on initiation and propagation of localized corrosion in alumninium alloys
… alloy AA2024 is susceptible to localized corrosion in the form of pitting and intergranular corrosion (IGC). The corrosion behaviour of this alloy is strongly influenced by the presence of different intermetallic particles. In this study, the effect of applied stress and the role of …
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Effect of Turbulence on the Passive Film Growth and Associated Durability of Aluminum Alloys in Simulated Seawater
… (Reynolds number of 262,000). No typical erosion-corrosion hydrological features were observed, however significant pitting and intergranular corrosion were observed with corrosion product caps covering 47% of the total ultrasonic transducers' measurement area. Passive film and pit growth were …
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Microstructure and precipitation effects in inconel alloy 600.
… principle mode of material degradation, namely, intergranular corrosion. A range of carbide precipitation 'C-curves' have been established and related to thermal and mechanical processing. Accelerated corrosion testing has provided an insight into the relationship between precipitation and …
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Influence of environmental conditions and proton irradiation on molten salt corrosion of metals
… interactions between molten salts and materials, corrosion is critical to study for the successful deployment of these and other applications. This thesis contributes to our understanding of corrosion of metals in high temperature molten salts, especially fuorides. Corrosion of materials in molten …
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Surface Orientation Dependent Corrosion Damage and Temperature Dependent Mechanical Property Degradation of Sensitized AA5083-H116 Alloys
… changes of 5083-H116 to its resulting corrosion resistance and mechanical performance. Alcoa 5083-H116 was sensitized in an environmental chamber at 100°C for up to ~1500 hours and 150°C up to ~2000 hours, revealing different degrees of sensitization based on exposure times. …
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The influence of copper addition on the corrosion behaviour of low nickel austenitic stainless steels
… as partial substitutes for nickel on the corrosion performance of three metastable austenitic stainless steels, in various microstructural conditions, has been investigated. These alloys (based on AISI 301), which are to be used essentially in forming applications, were developed to …
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Understanding the mechanisms and parameters affecting the structural corrosion of sheet gauge 7xxx alloys
… is concerns regarding structural forms of corrosion, such as intergranular corrosion (IGC) and stress corrosion cracking (SCC). These can be attributed to the microstructure features of the grain boundary, specifically the precipitate and adjoining precipitate-free zone. Most published …
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In situ Nanoscale Quantification of Corrosion Kinetics by Quantitative Phase Microscopy
Corrosion-related degradation incurs a significant cost to infrastructure and society. In 2016, the direct corrosion cost was estimated at $276 billion, which is 3.1% of the U.S. gross domestic product. Despite the known consequences of corrosion damage, many unknowns still exist, such as the …
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The Corrosion Susceptibility of AA7050 Repaired for Aerospace Applications Via Additive Friction Stir Deposition
… aluminum alloy aerospace parts byexamining the corrosion response of materials processed with this technique. To date, the majorityof studies involving AFSD have pertained to mechanical and/or microstructural properties ofmaterial produced via AFSD. This leaves a gap in scientific knowledge …
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Transient Liquid Phase Bonding of Titanium-, Iron- and Nickel- Based Alloys
… experience extreme temperature, fatigue and corrosion conditions. Ti-based, Ni-based and Fe-based alloys are commonly used in gas turbines and jet engines depending on the temperatures of different sections. Although those alloys have superior mechanical, high temperature and corrosion …