Abstract
A high purity Ti-50 mol%Al intermetallic compound was found to be ductile having the fracture strain of more than 3%. The purification induced a large change in the microstructure. A single TiAl phase with smooth grain boundaries was observed. This is in contrast with the lamellar structure consisting of Ti3Al and TiAl with zigzag grain boundaries in the ordinary purity TiAl with the same composition.
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