Transverse directional solidification of metal single crystal ar

Details Transverse directional solidification of metal single crystal ar Transverse directional solidification of metal single crystal ar

1981-12-14

1989-02-14

Eley, Timothy V.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural distributing means immediately upstream of runner

164127, 1641222, F01D 102, B22D 1500

Patent

active

048043117

ABSTRACT:
During conventional directional solidification of a single crystal article having a large overhanging flange lying along its length, crystal nucleation defects and shrinkage occur in the flange. To form articles without such defects, the part is cast so that the solidification front moves transverse to the length of the article, and essentially parallel to the flange surfaces where the defects tend to occur. The solidification front is initiated at a seed crystal oriented to produce the desired crystal structure in the cast article. Dendritic effects produce somewhat different properties in articles cast in accord with the invention, compared to those cast with prior art techniques.

REFERENCES:
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patent: 3494709 (1970-02-01), Piearcey
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patent: 3598169 (1971-08-01), Copley et al.
patent: 4008052 (1977-02-01), Vishnevsky
patent: 4116723 (1978-09-01), Gell et al.
patent: 4190094 (1980-02-01), Giamei
patent: 4209348 (1980-06-01), Duhl et al.

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