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Title: Microstructural evolution in coated single crystal Ni-based superalloys
Author: Ogden, Sarah L.
ISNI:       0000 0004 2735 0756
Awarding Body: Loughborough University
Current Institution: Loughborough University
Date of Award: 2007
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Ni-based superalloys are primarily used in the manufacturing of critical gas turbine components, such as rotating blades. The drive for increased efficiency has led to a continuous rise in engine operating temperatures, and therefore these components are exposed to conditions that can ultimately compromise their mechanical integrity and therefore limit their service life. There is a desire to extend the component's life and also to avoid any premature failures, and therefore understanding of the material's stability and properties throughout component life is increasingly important. The identification of features in the microstructure of Ni-based superalloys which change systematically with time and temperature may allow it to be used as a 'time-temperature' recorder. This could enable a determination of the effective temperature a component will have experienced, and in conjunction with known values of operating stress, an estimate of the remaining service life can be made.
Supervisor: Not available Sponsor: Engineering and Physical Sciences Research Council (grant number GRlS86334/01) ; Alstom ; Chromalloy ; E.On UK ; Howmet (Alcoa) ; Mitsui Babcock ; National Physical Laboratory ; QinetiQ ; RWE npower ; Rolls Royce ; Siemens
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available