The interstitial concentration and temperature dependence
of the diffusion coefficient ratio D12/D11 in ternary austenites
containing silicon or manganese has been experimentally determined
using diffusion couples based on the concept of "transient
equilibrium". The results are compared with values predicted
theoretically from statistical and thermodynamic considerations. </p> <p> The kinetics of the growth of proeutectoid ferrite in
binary and ternary austenites have been determined, using two-phase
diffusion couples. The results are consistent with the
premise that carbon diffusion controls the rate of interface
migration. It is demonstrated, theoretically and experimentally,
that the ternary results fall into two classes - one in which
local equilibrium may be assumed, and one in which "constrained
local equilibrium" may be postulated. / Thesis / Doctor of Philosophy (PhD)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/19930 |
| Date | 08 1900 |
| Creators | Purdy, Gary |
| Contributors | Kirkaldy, J. S., Metallurgy |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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