Abstract
This study investigates the microstructure morphology in a single-track wall of Ti-47Al-2Cr-2Nb alloy produced by direct laser deposition. The as-deposited wall mainly exhibited an alternative-band microstructure containing a dendrite band and α2/γ lamellar band, which is considered to result from the influence of the heat affected zone. A tailoring method was proposed and alternative-band microstructures with various equiaxed colony fractions, and even nearly fully equiaxed colony microstructures, were successfully obtained.
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