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Primary Examiner: Dean, R.
Assistant Examiner:
Attorney: Smith, Jr.; Arthur A., Cook; Paul J.

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Title: Process for forming metal compositions containing cellular in situ composites

Abstract: A process for forming metal compositions containing cellular in situ composites. A metal composition containing at least 25 volume percent liquid is cooled to produce aligned columnar dendrite growth. The resultant composition then is subjected to isothermal coarsening in the semi-solid temperature range to form the cellular in situ composites. This composition then is solidified. The metal compositions are particularly useful in rotating machinery.

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Inventors: Flemings, Merton C. (Cambridge, MA, US)
Young, Kenneth P. (Arlington, MA, US)
Dunn, Edmund M. (Walnut Creek, CA, US)

Application Number: 924094
Filing Date: 1978-07-12
Publication_date: 1980-06-03
Assignee: Massachusetts Institute of Technology (Cambridge, MA)
Primary Class(es): 420/590 148/428
Other Classes:
US Patent Ref:

3915761

Oct, 1975

Tschinkel et al.

75/171.

Other Refs: Other References: Jackson et al., Conference on In Situ Composites, Aug. 1976, pp. 365-375, Xerox Individualized Publishing, Lexington, Massachusetts.