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

M. N. Mathabathe; A. S. Bolokang; G. Govender; R. J. Mostert; C. W. Siyasiya

doi:10.1016/j.vacuum.2018.04.055

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

M. N. Mathabathe, A. S. Bolokang, G. Govender, R. J. Mostert, C. W. Siyasiya

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

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.

Original language	English
Pages (from-to)	82-89
Number of pages	8
Journal	Vacuum
Volume	154
DOIs	https://doi.org/10.1016/j.vacuum.2018.04.055
Publication status	Published - Aug 2018
Externally published	Yes

Keywords

Cyclic oxidation
Oxynitrides
Ti-48Al-2Nb alloy
Ti-48Al-2Nb-0.7Cr-0.3Si alloy
Vacuum melted

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films

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10.1016/j.vacuum.2018.04.055

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

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.",

keywords = "Cyclic oxidation, Oxynitrides, Ti-48Al-2Nb alloy, Ti-48Al-2Nb-0.7Cr-0.3Si alloy, Vacuum melted",

author = "Mathabathe, {M. N.} and Bolokang, {A. S.} and G. Govender and Mostert, {R. J.} and Siyasiya, {C. W.}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = aug,

doi = "10.1016/j.vacuum.2018.04.055",

language = "English",

volume = "154",

pages = "82--89",

journal = "Vacuum",

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TY - JOUR

T1 - The vacuum melted ɣ-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties

AU - Mathabathe, M. N.

AU - Bolokang, A. S.

AU - Govender, G.

AU - Mostert, R. J.

AU - Siyasiya, C. W.

PY - 2018/8

Y1 - 2018/8

N2 - 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.

AB - 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.

KW - Cyclic oxidation

KW - Oxynitrides

KW - Ti-48Al-2Nb alloy

KW - Ti-48Al-2Nb-0.7Cr-0.3Si alloy

KW - Vacuum melted

UR - http://www.scopus.com/inward/record.url?scp=85046664799&partnerID=8YFLogxK

U2 - 10.1016/j.vacuum.2018.04.055

DO - 10.1016/j.vacuum.2018.04.055

M3 - Article

AN - SCOPUS:85046664799

SN - 0042-207X

VL - 154

SP - 82

EP - 89

JO - Vacuum

JF - Vacuum

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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