Cold-pressing and vacuum arc melting of γ-TiAl based alloys

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

doi:10.1016/j.apt.2019.08.038

Cold-pressing and vacuum arc melting of γ-TiAl based alloys

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

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

21 Citations (Scopus)

Abstract

Beta (β) solidifying γ-TiAl intermetallic alloys of nominal composition Ti-48Al, Ti-48Al-2Nb, Ti-48Al-2Nb-0.7Cr alloys have been cold pressed and vacuum arc melted. The Al loss was due to compaction method used prior to the melting technique, since it was evident after compaction that Al particles migrated to the surface in contact with the die facets after cold pressing. Electron backscatter diffraction (EBSD)-orientation mapping demonstrated that the α-precipitation from the parent β-phase follows the Blackburn orientation relationship (BOR). Microstructural characterization of the alloys was studied by scanning electron microscopy (SEM) equipped with energy dispersion spectroscopy (EDS) for micro-analysis. X-ray diffraction (XRD) technique was used to detect phase compositions.

Original language	English
Pages (from-to)	2925-2939
Number of pages	15
Journal	Advanced Powder Technology
Volume	30
Issue number	12
DOIs	https://doi.org/10.1016/j.apt.2019.08.038
Publication status	Published - Dec 2019
Externally published	Yes

Keywords

Uniaxial cold pressing
Vacuum arc melting (VAM)
β-phase domain
γ-TiAl based alloys

ASJC Scopus subject areas

General Chemical Engineering
Mechanics of Materials

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10.1016/j.apt.2019.08.038

Cite this

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title = "Cold-pressing and vacuum arc melting of γ-TiAl based alloys",

abstract = "Beta (β) solidifying γ-TiAl intermetallic alloys of nominal composition Ti-48Al, Ti-48Al-2Nb, Ti-48Al-2Nb-0.7Cr alloys have been cold pressed and vacuum arc melted. The Al loss was due to compaction method used prior to the melting technique, since it was evident after compaction that Al particles migrated to the surface in contact with the die facets after cold pressing. Electron backscatter diffraction (EBSD)-orientation mapping demonstrated that the α-precipitation from the parent β-phase follows the Blackburn orientation relationship (BOR). Microstructural characterization of the alloys was studied by scanning electron microscopy (SEM) equipped with energy dispersion spectroscopy (EDS) for micro-analysis. X-ray diffraction (XRD) technique was used to detect phase compositions.",

keywords = "Uniaxial cold pressing, Vacuum arc melting (VAM), β-phase domain, γ-TiAl based alloys",

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

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doi = "10.1016/j.apt.2019.08.038",

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T1 - Cold-pressing and vacuum arc melting of γ-TiAl based alloys

AU - Mathabathe, M. N.

AU - Bolokang, A. S.

AU - Govender, G.

AU - Siyasiya, C. W.

AU - Mostert, R. J.

PY - 2019/12

Y1 - 2019/12

N2 - Beta (β) solidifying γ-TiAl intermetallic alloys of nominal composition Ti-48Al, Ti-48Al-2Nb, Ti-48Al-2Nb-0.7Cr alloys have been cold pressed and vacuum arc melted. The Al loss was due to compaction method used prior to the melting technique, since it was evident after compaction that Al particles migrated to the surface in contact with the die facets after cold pressing. Electron backscatter diffraction (EBSD)-orientation mapping demonstrated that the α-precipitation from the parent β-phase follows the Blackburn orientation relationship (BOR). Microstructural characterization of the alloys was studied by scanning electron microscopy (SEM) equipped with energy dispersion spectroscopy (EDS) for micro-analysis. X-ray diffraction (XRD) technique was used to detect phase compositions.

AB - Beta (β) solidifying γ-TiAl intermetallic alloys of nominal composition Ti-48Al, Ti-48Al-2Nb, Ti-48Al-2Nb-0.7Cr alloys have been cold pressed and vacuum arc melted. The Al loss was due to compaction method used prior to the melting technique, since it was evident after compaction that Al particles migrated to the surface in contact with the die facets after cold pressing. Electron backscatter diffraction (EBSD)-orientation mapping demonstrated that the α-precipitation from the parent β-phase follows the Blackburn orientation relationship (BOR). Microstructural characterization of the alloys was studied by scanning electron microscopy (SEM) equipped with energy dispersion spectroscopy (EDS) for micro-analysis. X-ray diffraction (XRD) technique was used to detect phase compositions.

KW - Uniaxial cold pressing

KW - Vacuum arc melting (VAM)

KW - β-phase domain

KW - γ-TiAl based alloys

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DO - 10.1016/j.apt.2019.08.038

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EP - 2939

JO - Advanced Powder Technology

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ER -

Cold-pressing and vacuum arc melting of γ-TiAl based alloys

Abstract

Keywords

ASJC Scopus subject areas

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