naca-report-1023
- Version
- 159 Downloads
- 1.48 MB File Size
- 1 File Count
- September 1, 2016 Create Date
- September 1, 2016 Last Updated
National Advisory Committee for Aeronautics, Report - Diffusion of Chromium in Alpha Cobalt Chromium Solid Solutions
Difiusion of chromium in a cobalt-chromium solid solutions
was investigated in the range 0 to 40 atomic percent at tempera-
tures of 1.360", 1300°, 1150°, and 1000‘J 0. The difusion
coeficients were found to be relatively constant within the com—
position range catered by each specimen.
Several important high-temperature alloys (Haynes Stel-
lite 21, X—40, 61, and 422—19) consist primarily of cobalt
and chromium; Haynes Stellite 21 has been one of the most
extensively used turbojet—blade alloys in the United States.
Because of the importance of cobalt-chromium based alloys
and because diffusion controls many reactions within solid
metals, an investigation was conducted at the NACA Lewis
laboratory to determine the diffusion coefficients of chromium
into a: cobalt-chromium solid solutions, to determine the
dependence of these coefficients on concentration, and to
evaluate the basic constants Q and A in the exponential
equation relating temperature and diffusion (reference 1)
| File | Action |
|---|---|
| naca-report-1023 Diffusion of Chromium in Alpha Cobalt Chromium Solid Solutions.pdf | Download |
Comment On This Post