Metallurgical Transactions A

, Volume 23, Supplement 1, pp 3245–3249 | Cite as

Application of the square root

  • M. K. Stalker
  • J. E. Morral
  • A. D. Romig
Transport Phenomena
Received:

Abstract

The square root diffusivity matrix [r] and diffusivity matrix [D] have been measured for a Ni-4.0 at. pct Cr-6.3 at. pct Al-3.5 at. pct Mo quaternary alloy at 1100 °C. Using a constant diffusivity analysis, the diffusivities were obtained from three diffusion couples having small initial concentration differences of 5 at. pct or less. When elements of [r] were substituted into the error function solution of the diffusion equation, it was found that the predicted concentration profiles were accurate to within ±0.1 at. pct of measured values. Also, it was found that Mo tends to reduce the diffusion kinetics of Cr and Al in Ni-base alloys. These results suggest that these methods of analyzing diffusion data and predicting interdiffusion data can be applied to alloys containing more than four components.

Keywords

Metallurgical Transaction Diffusion Couple Sandia National Laboratory Diffusivity Matrix Ternary Diffusion Couple 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© The Minerals, Metals & Materials Society - ASM Materials - The Materials Information Society 1992

Authors and Affiliations

  • M. K. Stalker
    • 1
  • J. E. Morral
    • 2
  • A. D. Romig
    • 3
  1. 1.Armstrong World IndustriesLancaster
  2. 2.Department of Metallurgy and Institute of Materials ScienceUniversity of ConnecticutStorrs
  3. 3.Sandia National LaboratoriesAlbuquerque

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