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You searched for +publisher:"University of Tennessee – Knoxville" +contributor:("Brian D. Wirth, Kurt E. Sickafus"). One record found.

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University of Tennessee – Knoxville

1. Pratt, Wayne Ethan. Kinetic and Thermodynamic Modeling of Long Term Phase Stability in Alloy 800H Subjected to LWR Core Conditions.

Degree: MS, Materials Science and Engineering, 2015, University of Tennessee – Knoxville

An in depth literature review of Incoloy Alloy 800H was conducted and presented to summarize the current understanding of microstructural evolution under irradiation and secondary phase precipitate stability. Due to a lack of radiation induced segregation (RIS) data for Alloy 800H, Isopleth sections varying Cr, Ni, Ti, and Si were generated from a computational thermodynamics approach using ThermoCalc and analyzed to compensate for knowledge related to radiation induced precipitates (RIP’s). These isopleths were analyzed for a composition range based off previous knowledge of RIS tendencies in austenitic stainless steels. Analysis of four major binary phase diagrams and complex phase diagrams calculated through ThermoCalc and MatCalc were used to simulate the precipitation kinetics during the lifetime of Incoloy Alloy 800H used in a light water reactor (LWR) core setting. These aging simulations were then conducted using the MatCalc heat treatments tool with M23C6 [Chromium Carbide], Sigma, and Ni3Ti [Gamma Prime] set as the precipitates of interest. A discrepancy was found relating to the presence of sigma phase at low temperatures between ThermoCalc and MatCalc complex phase diagram calculations. Several minor phases were noted from the complex phase diagrams and isopleths for further research. Isopleth sections revealed that no major RIP’s should form given the current assumption of RIS behavior. Simulations of precipitation kinetics predict a precipitate coarsening somewhere between 6-7 years of operation for M236 [Chromium Carbide] precipitates. This results in a decline in number density and an increase in precipitate size. Anticipated radiation induced segregation has very little effect on M23C [Chromium Carbide] precipitate size, however increasing RIS results in the formation of fewer M23C6 [Chromium Carbide] precipitates. Sigma phase is found to increase in amount and decrease in size as segregation increases until the number of precipitates reaches a maximum between 20.42 and 14.42 wt% Cr. At doses greater than this the density of sigma precipitates is expected to decrease while the size of precipitates is expected to remain consistent. Advisors/Committee Members: Steven J. Zinkle, Brian D. Wirth, Kurt E. Sickafus.

Subjects/Keywords: Phase Stability; 800H; Kinetic Modeling; Thermodynamic Modeling; Reactor Core; Light Water Reactor; Materials Science and Engineering; Nuclear Engineering; Other Materials Science and Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Pratt, W. E. (2015). Kinetic and Thermodynamic Modeling of Long Term Phase Stability in Alloy 800H Subjected to LWR Core Conditions. (Thesis). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_gradthes/3602

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Pratt, Wayne Ethan. “Kinetic and Thermodynamic Modeling of Long Term Phase Stability in Alloy 800H Subjected to LWR Core Conditions.” 2015. Thesis, University of Tennessee – Knoxville. Accessed March 20, 2019. https://trace.tennessee.edu/utk_gradthes/3602.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Pratt, Wayne Ethan. “Kinetic and Thermodynamic Modeling of Long Term Phase Stability in Alloy 800H Subjected to LWR Core Conditions.” 2015. Web. 20 Mar 2019.

Vancouver:

Pratt WE. Kinetic and Thermodynamic Modeling of Long Term Phase Stability in Alloy 800H Subjected to LWR Core Conditions. [Internet] [Thesis]. University of Tennessee – Knoxville; 2015. [cited 2019 Mar 20]. Available from: https://trace.tennessee.edu/utk_gradthes/3602.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pratt WE. Kinetic and Thermodynamic Modeling of Long Term Phase Stability in Alloy 800H Subjected to LWR Core Conditions. [Thesis]. University of Tennessee – Knoxville; 2015. Available from: https://trace.tennessee.edu/utk_gradthes/3602

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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