An electron microscopy study of continuous ordering and phase separation in iron-rich iron-aluminum alloys
Name
01881024-MIT.pdf
Description
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5.44 MB
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Checksum (MD5)
e676a71e33cca693e0cccd7b5abde933
Author(s)
Allen, Samuel Miller
Advisor(s)
J.W. Cahn.
Date Issued
1975
Publisher
Massachusetts Institute of Technology
Abstract
The discrepancy between two recent phase diagram determinations of the Fe-Al system is resolved experimentally. Both diagrams are correct, but-one is a metastable coherent phase diagram. The iron-aluminum system possesses a tricritical point where a line of [lambda]- transitions ends at a miscibility gap at about 23 atom percent aluminum and 615°C. Rules of general applicability governing phase separation within the miscibility gap are developed. Application of the rules to the iron-aluminum system results in detailed predictions about the mechanisms of decomposition and their sequences in this system. Electron microscopy is used to study the reactions experimentally and the results are in agreement with theoretical predictions.
Description
Thesis: Ph. D., Massachusetts Institute of Technology. Department of Materials Science and Engineering, 1975.
Vita.
Includes bibliographical references.
Subjects
Materials Science and Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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