Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 410, Issue -, Pages 257-260Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2005.09.087
Keywords
severe plastic deformation; nickel alloy; nanocrystallization
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=A surface severe plastic deformation (SPD) method has been applied to bulk specimens of Hastelloy C2000 (R), a nickel-based alloy. A microstructural gradient that is a function of processing conditions has been obtained and analyzed in order to discern the mechanism responsible for the observed grain refinement. Microstructural defects, such as dislocations and deformation twins, have been found to be present in the deformed surface layer. The role of these defects in the surface nanocrystallization process has been discussed. (c) 2005 Elsevier B.V. All rights reserved.
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