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The influence of gamma prime on the recrystallization of an oxide dispersion strengthened superalloy - MA 6000EThe requirement of large, recrystallized, highly elongated grains is of primary importance to the development of suitable high temperature properties in oxide dispersion strengthened-superalloys. In the present study the recrystallization behavior of MA 6000E, a recently developed Y2O3 strengthened superalloy produced by mechanical alloying, was examined using transmission and replication microscopy. Gradient and isothermal annealing treatments were applied to extruded and hot rolled products. It was found that conversion from a very fine (0.2 micron) grain structure to a coarse (approximately 10 mm) grain structure is controlled by the dissolution of the gamma prime phase, while grain shape was controlled primarily by the thermal gradient. The fine uniform oxide dispersion appeared to have only a secondary influence in determining the grain shape as columnar grains could be grown transverse to the working direction by appropriate application of the thermal gradient.
Document ID
19820063858
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hotzler, R. K.
(Queensborough Community College Bayside, NY, United States)
Glasgow, T. K.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1982
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 13A
Subject Category
Metallic Materials
Accession Number
82A47393
Distribution Limits
Public
Copyright
Other

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