Coarsening Behavior of Gamma Prime Precipitates and Concurrent Transitions in the Interface Width in Ni-14 at%A1-7 at%Cr (Preprint)

Abstract

Coupling atom probe tomography (APT) and transmission electron microscopy (TEM), the temporal evolution of the precipitate morphology and size distribution, and compositional width of gamma/gamma' interface and associated elemental partitioning, has been tracked in a model Ni-14Al-7Cr(at%) alloy, during isothermal annealing at 800 degrees C. During the initial annealing period, accelerated growth of gamma' is accompanied by a gradual decrease in interface width and enhancement of solute partitioning. Further annealing exhibits classical LSW coarsening with minimal changes in the interface.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2012
Accession Number
ADA565957

Entities

People

  • J. Tiley
  • J. Y. Ywang
  • R. Banerjee
  • S. Meher
  • S. Nag
  • Tanaporn Rojhirunsakool

Organizations

  • University of North Texas

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Annealing
  • Electron Microscopy
  • Far Field
  • Materials
  • Materials Engineering
  • Materials Science
  • Microscopes
  • Microscopy
  • Military Research
  • Particle Size
  • Precipitates
  • Steady State
  • Transitions
  • Transmission Electron Microscopy

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics