TiAl intermetallic articles

Details TiAl intermetallic articles TiAl intermetallic articles

1993-10-26

1995-07-04

Roy, Upendra

Alloys or metallic compositions

Processes

148421, 420418, 420421, C22C 1400

Patent

active

054297966

ABSTRACT:
A TiAl alloy base melt including at least one of Cr, C, Ga, Mo, Mn, Nb, Ni Si, Ta, V and W and at least about 0.5 volume % boride dispersoids is investment cast to form a crack-free, net or near-net shape article having a gamma TiAl intermetallic-containing matrix with a grain size of about 10 to about 250 microns as a result of the presence of the boride dispersoids in the melt. As hot isostatically pressed and heat treated to provide an equiaxed grain structure, the article exhibits improved strength.

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