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Design of Novel β‐Solidifying TiAl Alloys with Adjustable β/B2‐Phase Fraction and Excellent Hot‐Workability
Author(s) -
Clemens H.,
Wallgram W.,
Kremmer S.,
Güther V.,
Otto A.,
Bartels A.
Publication year - 2008
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200800164
Subject(s) - materials science , calphad , alloy , volume fraction , work (physics) , metallurgy , phase (matter) , thermodynamics , phase diagram , composite material , chemistry , physics , organic chemistry
Conventional high Nb bearing γ‐TiAl based alloys exhibit a strong tendency to segregations because of their peritectic solidification path which cause severe problems regarding the hot‐working behaviour. Thermodynamic calculations based on the CALPHAD method were applied to define a β‐solidifying TiAl based alloy, which exhibits an adjustable β/B2‐phase volume fraction at temperatures where hot‐work processes are performed. Therefore, this alloy can be forged under near conventional conditions.