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Type Kolli, R. Prakash; Seidman, David N.
  Publication Asymmetric Chemical Composition Profiles of Nanoscale Precipitates in a Multi-component Alloy Studied by 3-D Atom-Probe Tomography Volume Journal Article
Pages 2006
  Abstract Scripta Materialia  
  Corporate Author Scripta Mater.  
Publisher Submitted  
  Summary Language Series Editor 3-D atom-probe tomography, Fe-Cu steels, phase transformations, heterogeneous segregation, precipitation  
Abbreviated Series Title Compositional profiles of precipitates in a multi-component Fe-Cu steel are obtained by 3-D local-electrode atom-probe (LEAP) tomography. Adjacent Cu-rich and Ni-Al-Mn rich regions in the 1-hour aged alloy evolve temporally into a Cu-rich precipitate core enveloped by a Ni-Al-Mn (0.42:0.49:0.09) enriched spherical-shell in the 1024-hour aged alloy. The compositions of the shells are demonstrated, for the first time, to be asymmetric. We propose this results from precipitation of Cu-rich precipitates followed by heterogeneous nucleation of Ni-Al-Mn on them and subsequent diffusional growth.
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PDF removed at request of author no NU @ karnesky @ 773
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