An evaluation of high-temperature phase stability in the Ti-Al-Nb system

Orlando Rios; Sonalika Goyel; Michael S. Kesler; Damian M. Cupid; Hans J. Seifert; Fereshteh Ebrahimi

doi:10.1016/j.scriptamat.2008.09.023

An evaluation of high-temperature phase stability in the Ti-Al-Nb system

Orlando Rios, Sonalika Goyel, Michael S. Kesler, Damian M. Cupid, Hans J. Seifert, Fereshteh Ebrahimi

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

31 Scopus citations

Abstract

Ti-Al-Nb alloys have shown promising properties for high-temperature applications. Although the phase diagram for this system has been well researched, there is still controversy over some aspects, including the extent of the β-phase field. We have studied an alloy with the composition 37Ti-44.5Al-18.5Nb, which based on existing phase diagrams is expected to solidify as the γ-TiAl phase. Experimental observations revealed that this alloy solidified as the β-phase, suggesting an extended β-phase field beyond the previously reported phase boundary.

Original language	English
Pages (from-to)	156-159
Number of pages	4
Journal	Scripta Materialia
Volume	60
Issue number	3
DOIs	https://doi.org/10.1016/j.scriptamat.2008.09.023
State	Published - Feb 2009
Externally published	Yes

Funding

This work has been supported by NSF/AFOSR under Grant No. DMR-0605702. The use of Major Analytical Instrumentation Center (MAIC) at the University of Florida is greatly appreciated.

Funders	Funder number
NSF/AFOSR

Keywords

Differential scanning calorimetry (DSC)
Phase transformation
Titanium aluminides
X-ray diffraction (XRD)

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10.1016/j.scriptamat.2008.09.023

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title = "An evaluation of high-temperature phase stability in the Ti-Al-Nb system",

abstract = "Ti-Al-Nb alloys have shown promising properties for high-temperature applications. Although the phase diagram for this system has been well researched, there is still controversy over some aspects, including the extent of the β-phase field. We have studied an alloy with the composition 37Ti-44.5Al-18.5Nb, which based on existing phase diagrams is expected to solidify as the γ-TiAl phase. Experimental observations revealed that this alloy solidified as the β-phase, suggesting an extended β-phase field beyond the previously reported phase boundary.",

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AU - Rios, Orlando

AU - Goyel, Sonalika

AU - Kesler, Michael S.

AU - Cupid, Damian M.

AU - Seifert, Hans J.

AU - Ebrahimi, Fereshteh

PY - 2009/2

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AB - Ti-Al-Nb alloys have shown promising properties for high-temperature applications. Although the phase diagram for this system has been well researched, there is still controversy over some aspects, including the extent of the β-phase field. We have studied an alloy with the composition 37Ti-44.5Al-18.5Nb, which based on existing phase diagrams is expected to solidify as the γ-TiAl phase. Experimental observations revealed that this alloy solidified as the β-phase, suggesting an extended β-phase field beyond the previously reported phase boundary.

KW - Differential scanning calorimetry (DSC)

KW - Phase transformation

KW - Titanium aluminides

KW - X-ray diffraction (XRD)

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ER -

An evaluation of high-temperature phase stability in the Ti-Al-Nb system

Abstract

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Keywords

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