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Dislocation Processes and Deformation Behavior in <001>-Oriented FeX-Ni60–X-Al40 Single Crystals

Published online by Cambridge University Press:  21 March 2011

P. S. Brenner ,
R. Srinivasan ,
R. D. Noebe ,
T. Lograsso  and
M. J. Mills
P. S. Brenner
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
R. Srinivasan
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
R. D. Noebe
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
T. Lograsso
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
M. J. Mills
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
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Abstract

The mechanical properties and dislocation microstructure of single crystals with a range of compositions within the Fex-Ni60–x-Al40 pseudobinary system have been investigated, with the purpose of bridging the behavior from FeAl to NiAl. Experiments are focused on the compression testing of <001> oriented single crystals with compositions where x = 10, 20, 30, 40, and 50 (in atomic percent). Observations of a<111> dislocation morphologies at room temperature and both a<111> and non-a<111> dislocation activity at elevated temperatures are reported and discussed. Measurements of the yield strength, elastic modulus and strain hardening rates are reported, and the variation of strength with composition is correlated with dislocation dissociation and overall dislocation morphology.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 646 , 2000 , N6.1.1
Copyright
Copyright © Materials Research Society 2001

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Footnotes

*

NASA Glenn Research Center, Cleveland Ohio 44135

**

111A Metals Development, Ames Laboratory, Ames, IA 50011

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