Comparative oxidation study of un-coated and coated CMSX- 4 and CMSX-486 single crystal superalloys

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dc.contributor.authorSmith, Mathew
dc.contributor.examiningcommitteeTelichev, Igor (Mechanical and Manufacturing Engineering) Lin, Francis (Physics and Astronomy)en_US
dc.contributor.supervisorOjo, Olanrewaju (Mechanical and Manufacturing Engineering) Deng, Chuang (Mechanical and Manufacturing Engineering)en_US
dc.date.accessioned2013-02-21T18:38:12Z
dc.date.available2013-02-21T18:38:12Z
dc.date.issued2013-02-21
dc.degree.disciplineMechanical and Manufacturing Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractMicrostructural comparison of the isothermal oxidation performance of an experimental Ni-5Cr-15Al overlay coating applied to CMSX-4 and CMSX-486 was performed at 1100 ℃. High temperature oxidation was carried out in a box furnace for a maximum duration of 192 hrs. Samples were periodically removed and the oxide, coating and substrates microstructurally analyzed using SEM, EDS and XRD equipment. Uncoated CMSX-4 and CMSX-486 were also oxidized using the same conditions in an attempt to understand how the coating affected oxidation performance based on microstructural changes. Results show that both CMSX-4 and CMSX-486 have unacceptable oxidation characteristics in the un-coated condition, where CMSX-486 had significantly better performance than CMSX-4. However, in the coated condition, both CMSX-4 and CMSX-486 had no significant difference in oxidation performance. It was found, in the un-coated and coated conditions, that the role of Hf in CMSX-486 played a significant role in determining oxidation performance of the material.en_US
dc.description.noteMay 2013en_US
dc.identifier.urihttp://hdl.handle.net/1993/16680
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectCMSX-4en_US
dc.subjectCMSX-486en_US
dc.subjectOverlay Coatingen_US
dc.subjectOxidationen_US
dc.subjectSuperalloyen_US
dc.subjectSingle Crystalen_US
dc.titleComparative oxidation study of un-coated and coated CMSX- 4 and CMSX-486 single crystal superalloysen_US
dc.typemaster thesisen_US
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