2026-09-19T03:57:17Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1055852026-06-17T14:47:06Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
J.W. Cahn.
Allen, Samuel Miller
Massachusetts Institute of Technology. Department of Materials Science and Engineering.
Massachusetts Institute of Technology. Department of Materials Science and Engineering
2016-12-05T19:53:47Z
2016-12-05T19:53:47Z
1975
http://hdl.handle.net/1721.1/105585
01881024
Thesis: Ph. D., Massachusetts Institute of Technology. Department of Materials Science and Engineering, 1975.
Vita.
Includes bibliographical references.
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.
by Samuel Miller Allen.
Ph.D.
108 leaves
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Materials Science and Engineering.
Order-disorder in alloys
Iron-aluminum alloys
Critical point
Phase diagrams
Phase transformations (Statistical physics)
An electron microscopy study of continuous ordering and phase separation in iron-rich iron-aluminum alloys
Thesis
application/pdf
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Publication
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