Tia1 intermetallic articles and method of making same

Details Tia1 intermetallic articles and method of making same Tia1 intermetallic articles and method of making same

C - Chemistry, Metallurgy

22

C

C22C 14/00 (2006.01)

Patent

CA 2057373

TiAl INTERMETALLIC ARTICLES AND METHOD OF MAKING SAME Abstract of the Disclosure 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 .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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