Investment casting a titanium aluminide article having net or ne

Details Investment casting a titanium aluminide article having net or ne Investment casting a titanium aluminide article having net or ne

1990-12-11

1994-02-08

Roy, Upendra

Alloys or metallic compositions

Processes

148421, 148669, 148670, 420421, C22C 1400

Patent

active

052846202

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.

REFERENCES:
patent: 5082506 (1992-01-01), Huang
patent: 5082624 (1992-01-01), Huang
patent: 5098653 (1992-03-01), Huang

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