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Nano‐Scale Design of TiAl Alloys Based on β‐Phase Decomposition
Author(s) -
Appel F.,
Oehring M.,
Paul J. D. H.
Publication year - 2006
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.200600013
Subject(s) - materials science , microstructure , substructure , alloy , transmission electron microscopy , phase (matter) , nanometre , thermomechanical processing , metallurgy , composite material , nano , powder metallurgy , nanotechnology , chemistry , organic chemistry , structural engineering , engineering
Phase decomposition and ordering reactions in β/B2‐phase containing TiAl alloys were utilized to establish a novel, previously unreported, type of laminate microstructure. The characteristic constituent of this microstructure are laths with a nanometer‐scale substructure that are comprised of several stable and metastable phases. Microstructural control can be achieved by conventional thermomechanical processing and leads to a structurally and chemically very homogeneous material with excellent mechanical properties. The physical metallurgy of this novel type of alloy has been assessed by transmission electron microscope investigations and mechanical testing.