Directionally Solidified Ti-48Al-2Cr-2Nb Made By Power Down or Bridgeman Processing

Development of directionally solidified γ-TiAl structures

“…The objectives of this research program were to develop the technology associated with DS processing of g-TiAl alloys and to develop the equipment and processes for pilot-scale industrial fabrication of DS g-TiAl structures. From results obtained early in the program [27][28][29][30], it was apparent that the relationships between casting process parameters, solidification conditions, and microstructure formation were complex and not easily determined through analytical or experimental means. As was the case with early nickel-base superalloy DS technology [31], it became clear that numerical process modelling was necessary to help elucidate and to develop a better fundamental understanding of these relationships.…”