In and ex situ investigations of the β-phase in a Nb and Mo containing γ-TiAl based alloy

H. Clemens; H. F. Chladil; W. Wallgram; G. A. Zickler; R. Gerling; K. D. Liss; S. Kremmer; V. Güther; W. Smarsly

doi:10.1016/j.intermet.2008.03.008

In and ex situ investigations of the β-phase in a Nb and Mo containing γ-TiAl based alloy

H. Clemens^*, H. F. Chladil, W. Wallgram, G. A. Zickler, R. Gerling, K. D. Liss, S. Kremmer, V. Güther, W. Smarsly

^*Corresponding author for this work

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

159 Scopus citations

Abstract

In a β-stabilized Ti-43Al-4Nb-1Mo-0.1B alloy (composition in atomic percent) the correlation between the occurrence of β-phase and temperature was analyzed experimentally and compared to thermodynamic calculations. Results from in situ high-energy X-ray diffraction, texture measurements, heat treatments, scanning electron microscopy, and temperature-dependent flow stress measurements were used to study the evolution of the β-phase with temperature. Thermodynamic calculations based on the CALPHAD method were applied to correlate the phases developed in the β-solidifying TiAl based alloy under investigation. This alloy is characterized by an adjustable β-phase volume fraction at temperatures where hot-work processes such as forging and rolling are conducted. Due to a high volume fraction of β-phase at elevated temperatures the hot-extruded alloy can be forged under near conventional conditions.

Original language	English
Pages (from-to)	827-833
Number of pages	7
Journal	Intermetallics
Volume	16
Issue number	6
DOIs	https://doi.org/10.1016/j.intermet.2008.03.008
State	Published - Jun 2008
Externally published	Yes

Keywords

A. Titanium aluminides, based on TiAl
B. Alloy design
B. phase identification
B. texture
E. Phase diagram, prediction

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title = "In and ex situ investigations of the β-phase in a Nb and Mo containing γ-TiAl based alloy",

abstract = "In a β-stabilized Ti-43Al-4Nb-1Mo-0.1B alloy (composition in atomic percent) the correlation between the occurrence of β-phase and temperature was analyzed experimentally and compared to thermodynamic calculations. Results from in situ high-energy X-ray diffraction, texture measurements, heat treatments, scanning electron microscopy, and temperature-dependent flow stress measurements were used to study the evolution of the β-phase with temperature. Thermodynamic calculations based on the CALPHAD method were applied to correlate the phases developed in the β-solidifying TiAl based alloy under investigation. This alloy is characterized by an adjustable β-phase volume fraction at temperatures where hot-work processes such as forging and rolling are conducted. Due to a high volume fraction of β-phase at elevated temperatures the hot-extruded alloy can be forged under near conventional conditions.",

keywords = "A. Titanium aluminides, based on TiAl, B. Alloy design, B. phase identification, B. texture, E. Phase diagram, prediction",

author = "H. Clemens and Chladil, {H. F.} and W. Wallgram and Zickler, {G. A.} and R. Gerling and Liss, {K. D.} and S. Kremmer and V. G{\"u}ther and W. Smarsly",

year = "2008",

month = jun,

doi = "10.1016/j.intermet.2008.03.008",

language = "英语",

volume = "16",

pages = "827--833",

journal = "Intermetallics",

issn = "0966-9795",

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T1 - In and ex situ investigations of the β-phase in a Nb and Mo containing γ-TiAl based alloy

AU - Clemens, H.

AU - Chladil, H. F.

AU - Wallgram, W.

AU - Zickler, G. A.

AU - Gerling, R.

AU - Liss, K. D.

AU - Kremmer, S.

AU - Güther, V.

AU - Smarsly, W.

PY - 2008/6

Y1 - 2008/6

N2 - In a β-stabilized Ti-43Al-4Nb-1Mo-0.1B alloy (composition in atomic percent) the correlation between the occurrence of β-phase and temperature was analyzed experimentally and compared to thermodynamic calculations. Results from in situ high-energy X-ray diffraction, texture measurements, heat treatments, scanning electron microscopy, and temperature-dependent flow stress measurements were used to study the evolution of the β-phase with temperature. Thermodynamic calculations based on the CALPHAD method were applied to correlate the phases developed in the β-solidifying TiAl based alloy under investigation. This alloy is characterized by an adjustable β-phase volume fraction at temperatures where hot-work processes such as forging and rolling are conducted. Due to a high volume fraction of β-phase at elevated temperatures the hot-extruded alloy can be forged under near conventional conditions.

AB - In a β-stabilized Ti-43Al-4Nb-1Mo-0.1B alloy (composition in atomic percent) the correlation between the occurrence of β-phase and temperature was analyzed experimentally and compared to thermodynamic calculations. Results from in situ high-energy X-ray diffraction, texture measurements, heat treatments, scanning electron microscopy, and temperature-dependent flow stress measurements were used to study the evolution of the β-phase with temperature. Thermodynamic calculations based on the CALPHAD method were applied to correlate the phases developed in the β-solidifying TiAl based alloy under investigation. This alloy is characterized by an adjustable β-phase volume fraction at temperatures where hot-work processes such as forging and rolling are conducted. Due to a high volume fraction of β-phase at elevated temperatures the hot-extruded alloy can be forged under near conventional conditions.

KW - A. Titanium aluminides, based on TiAl

KW - B. Alloy design

KW - B. phase identification

KW - B. texture

KW - E. Phase diagram, prediction

UR - http://www.scopus.com/inward/record.url?scp=44349145968&partnerID=8YFLogxK

U2 - 10.1016/j.intermet.2008.03.008

DO - 10.1016/j.intermet.2008.03.008

M3 - 文章

AN - SCOPUS:44349145968

VL - 16

SP - 827

EP - 833

JO - Intermetallics

JF - Intermetallics

SN - 0966-9795

IS - 6

ER -

In and ex situ investigations of the β-phase in a Nb and Mo containing γ-TiAl based alloy

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Keywords

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