Title: Control of microstructure in cast eutectic articles

Abstract: This invention concerns a method for controlling the microstructure of directionally solidified eutectic articles and the article produced thereby. The method is particularly appropriate for the production of articles such as turbine blades which require different mechanical properties in different areas of the article. The microstructure is controlled by varying the directional solidification conditions during the casting process.

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Inventors: Erickson, John S. (Colchester, CT, US)
Thompson, Earl R. (Glastonbury, CT, US)
Curran, Patrick M. (Tolland, CT, US)

Application Number: 830254
Filing Date: 1977-09-02
Publication_date: 1980-01-22
Assignee: United Technologies Corporation (Hartford, CT)
Primary Class(es): 148/404 148/428, 148/429, 148/902, 416/193A, 416/241R
Other Classes:
US Patent Ref:

3939895

Feb, 1976

Sawyer

164/127.

Other Refs:
Primary Examiner: Dean, R.
Assistant Examiner:
Attorney: Sohl; Charles E.