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Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating
Gas turbines in power generation systems use both nickel and cobalt-based superalloys for vanes, blades, discs and combustion chamber components. Cobalt-based superalloys have the advantage over nickel based superalloys in that they have a higher thermal conductivity and hence a greater thermal shoc...
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| Format: | Default Thesis |
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2007
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| Online Access: | https://hdl.handle.net/2134/15182 |
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| _version_ | 1818173322369695744 |
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| author | David L. Oates |
| author_facet | David L. Oates |
| author_sort | David L. Oates (7125002) |
| collection | Figshare |
| description | Gas turbines in power generation systems use both nickel and cobalt-based superalloys for vanes, blades, discs and combustion chamber components. Cobalt-based superalloys have the advantage over nickel based superalloys in that they have a higher thermal conductivity and hence a greater thermal shock resistance, a greater resistance to thermal fatigue and also a better corrosion resistance. However, in some applications coatings have to be applied to such alloys because of their poor oxidation resistance. The creep strength of cobalt-based superalloys depends primarily on solid solution strengthening and the interaction between the hard carbides and alloy defects, such as dislocations and stacking faults. There is a need to develop an understanding of the microstructural changes that occur in cobalt-based superalloys, with both time and temperature, for life prediction, refurbishment and failure investigations... cont'd. |
| format | Default Thesis |
| id | rr-article-9233018 |
| institution | Loughborough University |
| publishDate | 2007 |
| record_format | Figshare |
| spelling | rr-article-92330182007-01-01T00:00:00Z Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating David L. Oates (7125002) Materials engineering not elsewhere classified untagged Materials Engineering not elsewhere classified Gas turbines in power generation systems use both nickel and cobalt-based superalloys for vanes, blades, discs and combustion chamber components. Cobalt-based superalloys have the advantage over nickel based superalloys in that they have a higher thermal conductivity and hence a greater thermal shock resistance, a greater resistance to thermal fatigue and also a better corrosion resistance. However, in some applications coatings have to be applied to such alloys because of their poor oxidation resistance. The creep strength of cobalt-based superalloys depends primarily on solid solution strengthening and the interaction between the hard carbides and alloy defects, such as dislocations and stacking faults. There is a need to develop an understanding of the microstructural changes that occur in cobalt-based superalloys, with both time and temperature, for life prediction, refurbishment and failure investigations... cont'd. 2007-01-01T00:00:00Z Text Thesis 2134/15182 https://figshare.com/articles/thesis/Microstructural_changes_as_a_time_temperature_indicator_in_cobalt_superalloys_and_a_NiCoCrAlTaY_coating/9233018 CC BY-NC-ND 4.0 |
| spellingShingle | Materials engineering not elsewhere classified untagged Materials Engineering not elsewhere classified David L. Oates Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating |
| title | Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating |
| title_full | Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating |
| title_fullStr | Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating |
| title_full_unstemmed | Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating |
| title_short | Microstructural changes as a time temperature indicator in cobalt superalloys and a NiCoCrAlTaY coating |
| title_sort | microstructural changes as a time temperature indicator in cobalt superalloys and a nicocraltay coating |
| topic | Materials engineering not elsewhere classified untagged Materials Engineering not elsewhere classified |
| url | https://hdl.handle.net/2134/15182 |