Multiphase diffusion in Fe-Ni-Al system at 1000/sup 0/C. II. Interdiffusion coefficients for. beta. and. gamma. alloys

Journal Article · Mon Oct 01 00:00:00 EDT 1979 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02812005· OSTI ID:5764259

Cheng, G H ^[1]; Dayananda, M A

---

1. China Steel Corp., Kaohsiung, Taiwan

Ternary interdiffusion coefficients were determined at 1000/sup 0/C at several Fe-Ni-Al alloy compositions with multiphase ..beta..(bcc) vs ..gamma..(fcc) diffusion couples which developed planar ..beta../..gamma..-interfaces. The coefficients, D tilde/sub ij//sup Fe/ (i,j = Al or Ni) were calculated at compositions corresponding to points of intersections of diffusion paths with Fe taken as the dependent component. These coefficients varied with composition by 1 to 2 orders of magnitude in the ..beta..-phase but relatively little in the ..gamma..-phase. Empirical relations were derived to describe the composition dependence of the main coefficients. D tilde/sub AlAl//sup Fe/ and D tilde/sub NiNi//sup Fe/. Interdiffusion coefficients with either Al or Ni as the dependent component were also evaluated. The relative diffusivities of the elements increase in the order, Fe, Ni, Al for both ..beta..- and ..gamma..-alloys. The ternary diffusion data were consistent with binary interdiffusion coefficients for Fe-Al and Fe-Ni alloys.

• OSTI ID: 5764259
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 10A:10; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM
ALUMINIUM ALLOYS
DEPOSITION
DIAGRAMS
DIFFUSION
ELEMENTS
INTERFACES
IRON ALLOYS
METALS
NICKEL
NICKEL ALLOYS
PHASE DIAGRAMS
SORPTIVE PROPERTIES
SURFACE COATING
SURFACE PROPERTIES
TRANSITION ELEMENTS