Directional atomic rearrangements during transformations between the α- And γ-phases in titanium aluminides

Klaus Dieter Liss; Andreas Stark; Arno Bartels; Helmut Clemens; Thomas Buslaps; Dominic Phelan; Lareine A. Yeoh

doi:10.1002/adem.200700322

Directional atomic rearrangements during transformations between the α- And γ-phases in titanium aluminides

Klaus Dieter Liss^*, Andreas Stark, Arno Bartels, Helmut Clemens, Thomas Buslaps, Dominic Phelan, Lareine A. Yeoh

^*Corresponding author for this work

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

20 Scopus citations

Abstract

An in-situ time resolved 2D diffraction and microscopy measurements were conducted at elevated temperature to study the directional atomic rearrangements during transformations between the α- and γ-phases in titanium aluminides. Phase transition from α₂-Ti₃Al to γ-TiAl, which had been followed in both reciprocal and real space, was found to appear homogeneously over the bulk and occur through an oriented rearrangement of atoms. Metallurgical investigations, including microscopy and conventional diffraction based structure and phase analysis, were performed off-situ on quenched and subsequently prepared samples. The phase evolution of the composition Ti-45Al-7.5Nb (concentration in atomic %) was also investigated. It was also concluded that similar transformations take place in several other material systems relevant for fundamental and applied research.

Original language	English
Pages (from-to)	389-392
Number of pages	4
Journal	Advanced Engineering Materials
Volume	10
Issue number	4
DOIs	https://doi.org/10.1002/adem.200700322
State	Published - Apr 2008
Externally published	Yes

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title = "Directional atomic rearrangements during transformations between the α- And γ-phases in titanium aluminides",

abstract = "An in-situ time resolved 2D diffraction and microscopy measurements were conducted at elevated temperature to study the directional atomic rearrangements during transformations between the α- and γ-phases in titanium aluminides. Phase transition from α2-Ti3Al to γ-TiAl, which had been followed in both reciprocal and real space, was found to appear homogeneously over the bulk and occur through an oriented rearrangement of atoms. Metallurgical investigations, including microscopy and conventional diffraction based structure and phase analysis, were performed off-situ on quenched and subsequently prepared samples. The phase evolution of the composition Ti-45Al-7.5Nb (concentration in atomic %) was also investigated. It was also concluded that similar transformations take place in several other material systems relevant for fundamental and applied research.",

author = "Liss, {Klaus Dieter} and Andreas Stark and Arno Bartels and Helmut Clemens and Thomas Buslaps and Dominic Phelan and Yeoh, {Lareine A.}",

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Directional atomic rearrangements during transformations between the α- And γ-phases in titanium aluminides. / Liss, Klaus Dieter; Stark, Andreas; Bartels, Arno; Clemens, Helmut; Buslaps, Thomas; Phelan, Dominic; Yeoh, Lareine A.

In: Advanced Engineering Materials, Vol. 10, No. 4, 04.2008, p. 389-392.

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

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T1 - Directional atomic rearrangements during transformations between the α- And γ-phases in titanium aluminides

AU - Liss, Klaus Dieter

AU - Stark, Andreas

AU - Bartels, Arno

AU - Clemens, Helmut

AU - Buslaps, Thomas

AU - Phelan, Dominic

AU - Yeoh, Lareine A.

PY - 2008/4

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AB - An in-situ time resolved 2D diffraction and microscopy measurements were conducted at elevated temperature to study the directional atomic rearrangements during transformations between the α- and γ-phases in titanium aluminides. Phase transition from α2-Ti3Al to γ-TiAl, which had been followed in both reciprocal and real space, was found to appear homogeneously over the bulk and occur through an oriented rearrangement of atoms. Metallurgical investigations, including microscopy and conventional diffraction based structure and phase analysis, were performed off-situ on quenched and subsequently prepared samples. The phase evolution of the composition Ti-45Al-7.5Nb (concentration in atomic %) was also investigated. It was also concluded that similar transformations take place in several other material systems relevant for fundamental and applied research.

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