The vacuum melted ɣ-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties

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dc.contributor.author Mathabathe, Maria Ntsoaki
dc.contributor.author Bolokang, A.S.
dc.contributor.author Govender, S.
dc.contributor.author Mostert, Roelf Johannes
dc.contributor.author Siyasiya, Charles Witness
dc.date.accessioned 2018-06-01T07:11:16Z
dc.date.issued 2018-08
dc.description.abstract The γ-TiAl intermetallic alloy doped with Nb, Cr, and Si metals has been developed. It has emerged that the ternary Ti-48Al-2Nb and quinary Ti-48Al-2Nb-0.7Cr-0.3Si alloys yielded the best mechanical and cyclic oxidation properties. In particular, the quinary Ti-48Al-2Nb-0.7Cr-0.3Si alloy rapidly developed the protective stable Al2O3 oxide doped with nitrogen and titanium oxynitride during cyclic oxidation. This showed a lower hardness when compared to the other alloys after cyclic oxidation. The oxide layer proved to have a good adhesive relationship with the parent metal. The alloys microstructures were analysed with the scanning electron microscopy (SEM). The sample hardness test were conducted by Vickers hardness tester. en_ZA
dc.description.department Materials Science and Metallurgical Engineering en_ZA
dc.description.embargo 2019-08-01
dc.description.librarian hj2018 en_ZA
dc.description.sponsorship Department of Science and Technology (HVD5S1X) and Council of Scientific and Industrial Research (CSIR). en_ZA
dc.description.uri http://www.journals.elsevier.com/vacuum en_ZA
dc.identifier.citation Mathabathe, M.N., Bolokang, A.S., Govender, G. et al. 2018, 'The vacuum melted ɣ-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties', Vacuum, vol. 154, pp. 82-89. en_ZA
dc.identifier.issn 0042-207X (print)
dc.identifier.issn 1879-2715 (online)
dc.identifier.other 10.1016/j.vacuum.2018.04.055
dc.identifier.uri http://hdl.handle.net/2263/65055
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2018 Elsevier Ltd. Notice : this is the author’s version of a work that was accepted for publication in Vacuum. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Vacuum, vol. 154, pp. 82-89, 2018. doi : 10.1016/j.vacuum.2018.04.055. en_ZA
dc.subject Scanning electron microscopy (SEM) en_ZA
dc.subject Oxynitrides en_ZA
dc.subject Cyclic oxidation en_ZA
dc.subject Vacuum melted en_ZA
dc.subject Ti-48Al-2Nb-0.7Cr-0.3Si alloy en_ZA
dc.subject Ti-48Al-2Nb alloy en_ZA
dc.subject Titanium (Ti) en_ZA
dc.subject Niobium alloys en_ZA
dc.subject Titanium oxynitride en_ZA
dc.subject Alumina en_ZA
dc.subject Aluminum alloys en_ZA
dc.subject Aluminum oxide en_ZA
dc.subject Chromium alloys en_ZA
dc.subject Oxidation en_ZA
dc.subject Silicon alloys en_ZA
dc.subject Ternary alloys en_ZA
dc.subject Titanium alloys en_ZA
dc.subject Vickers hardness en_ZA
dc.subject Lower hardness en_ZA
dc.subject Nb alloys en_ZA
dc.subject Oxide layer en_ZA
dc.subject Parent metal en_ZA
dc.subject Si alloys en_ZA
dc.title The vacuum melted ɣ-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties en_ZA
dc.type Postprint Article en_ZA


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