TiAl single crystals obtained by the floating zone technique

  • Fat-Halla N
  • Bahi S
  • Kawabata T
 et al. 
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Abstract

Several ingots with aluminium contents in the range 36-45 wt.% Al in the γ phase region of the TiAl system were cast using high purity titanium and aluminium. The floating zone technique was used for all specimens to obtain single crystals. Pure γ single-phase single-crystal specimens were obtained successfully with aluminium contents down to 40 wt.%. For the stoichiometric composition, two phases appeared after conventional zone melting and these could not be eliminated by a long anneal at 1273 K. However, large single-phase grains could be obtained after modification of the floating zone technique. © 1983.

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Authors

  • Nabil Fat-Halla

  • Sherif Bahi

  • T. Kawabata

  • O. Izumi

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