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Influence of tungsten on microstructure of mechanically alloyed γ‐TiAl
Author(s) -
DYMEK S.,
WRÓBEL M.,
BLICHARSKI M.
Publication year - 2006
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2006.01658.x
Subject(s) - materials science , extrusion , alloy , hot pressing , microstructure , metallurgy , tungsten , compaction , powder metallurgy , consolidation (business) , grain size , composite material , business , accounting
Summary This article presents preliminary results of the processing and characterization of γ‐TiAl alloy modified by W addition. An alloy with the target chemical composition of TiAl−5W (at.%) was synthesized by mechanical alloying. Two methods were used for powder compaction: hot pressing at 1300 °C and hot extrusion at 1100 °C. Hot extrusion turned out to be a superior consolidation technique over hot pressing. The matrix of final alloy was composed of a phase based on TiAl and a minor amount of Ti 3 Al. The grain size in the extruded alloy was much smaller than in the hot‐pressed one. Minute W particles formed a dispersoid.