NUCAPT Literature Database

From NUCAPT

1–1 of 1 record found matching your query (RSS):


Select All    Deselect All
 |   | 
Details
   print
  Record Links
Type Booth-Morrison, Christopher; Noebe, Ronald D.; Seidman, David N.
  Publication Effects of tantalum on the temporal evolution of a model Ni-Al-Cr superalloy during phase decomposition Volume Journal Article
Pages 2009
  Abstract Acta Materialia  
  Corporate Author Acta Mater.  
Publisher 57  
Editor 3
  Summary Language 909-920 Series Editor Nickel-based superalloys; Tantalum; Atom-probe tomography; Nanostructures  
Abbreviated Series Title The effects of a 2.0 at.% addition of Ta to a model Ni–10.0Al–8.5Cr (at.%) superalloy aged at 1073 K are assessed using scanning electron microscopy and atom-probe tomography. The γ′(L12)-precipitate morphology that develops as a result of γ-(fcc)matrix phase decomposition is found to evolve from a bimodal distribution of spheroidal precipitates, to {0 0 1}-faceted cuboids and parallelepipeds aligned along the elastically soft left angle bracket0 0 1right-pointing angle bracket-type directions. The phase compositions and the widths of the γ′-precipitate/γ-matrix heterophase interfaces evolve temporally as the Ni–Al–Cr–Ta alloy undergoes quasi-stationary state coarsening after 1 h of aging. Tantalum is observed to partition preferentially to the γ′-precipitate phase, and suppresses the mobility of Ni in the γ-matrix sufficiently to cause an accumulation of Ni on the γ-matrix side of the γ′/γ interface. Additionally, computational modeling, employing Thermo-Calc, Dictra and PrecipiCalc, is employed to elucidate the kinetic pathways that lead to phase decomposition in this concentrated Ni–Al–Cr–Ta alloy.
  Series Issue ISSN  
Medium
  Expedition Notes  
Call Number  
Contribution Id  
Serial URL ISBN  
no NU @ c-booth @ 10537
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Personal tools
Seidman Group
Atom-Probe Tomography
Search
Quick Search: