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The Role of Rhenium on the Temporal Evolution of the Nanostructure of a Model Ni-Al-Cr-Re SuperalloyRhenium (2 at.%) additions to a model Ni-8.5 at.% Cr-10 at.% Al alloy are studied with respect to its effects on the temporal evolution of the nanostructure and the partitioning behavior of the four elements between the gamma (fcc) and gamma' (L1(sub 2)) phases. Chemical evolution of this quaternary alloy aged at 1073 K from 0.25 to 264 h, is investigated by three-dimensional atom-probe (3DAP) microscopy. The morphology of gamma'-precipitates remains spheroidal, even at an aging time of 264 h. The results demonstrate that Re slows the coarsening of gamma'-precipitates, in comparison to the ternary Ni-10 at.% A1-8.5 at.% Cr alloy at 1073 K.
Document ID
20050198852
Acquisition Source
Glenn Research Center
Document Type
Reprint (Version printed in journal)
Authors
Yoon, Kevin E.
(Northwestern Univ. Chicago, IL, United States)
Noebe, Ronald D.
(NASA Glenn Research Center Cleveland, OH, United States)
Seidman, David N.
(Northwestern Univ. Chicago, IL, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2004
Publication Information
Publication: TMS Letters
Volume: 1
Issue: 2
Subject Category
Metals And Metallic Materials
Report/Patent Number
E-14855
Funding Number(s)
CONTRACT_GRANT: NGT3-52378
WBS: WBS 22-332-12-10-02
Distribution Limits
Public
Copyright
Other

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