Abstract
Phase transformation theory applicable to reaustenitisation that takes place upon heating low-alloy steels is described. The assumption of local equilibrium is made. Diffusivity of interstitial solute in austenite is treated as concentration dependent and no diffusion is allowed in cementite and ferrite. Under these assumptions, the process is controlled by the diffusion of the interstitial solute in the growing phase. A variational dual extremum principle is used to calculate the interstitial solute concentration profile for specified interface motions. These results are compared with those obtained for a constant diffusivity equal to a weighted average of the concentration-dependent diffusivity and to a variety of simple approximations to the full problem.
| Original language | English |
|---|---|
| Pages (from-to) | 2861-2868 |
| Number of pages | 8 |
| Journal | Acta Materialia |
| Volume | 44 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jan 1 1996 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys
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The effect of the concentration-dependent diffusivity of carbon in austenite on a model of reaustenitisation from ferrite/cementite mixtures in Fe-C steels. / Atkinson, C.; Akbay, Taner.
In: Acta Materialia, Vol. 44, No. 7, 01.01.1996, p. 2861-2868.Research output: Contribution to journal › Article
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TY - JOUR
T1 - The effect of the concentration-dependent diffusivity of carbon in austenite on a model of reaustenitisation from ferrite/cementite mixtures in Fe-C steels
AU - Atkinson, C.
AU - Akbay, Taner
PY - 1996/1/1
Y1 - 1996/1/1
N2 - Phase transformation theory applicable to reaustenitisation that takes place upon heating low-alloy steels is described. The assumption of local equilibrium is made. Diffusivity of interstitial solute in austenite is treated as concentration dependent and no diffusion is allowed in cementite and ferrite. Under these assumptions, the process is controlled by the diffusion of the interstitial solute in the growing phase. A variational dual extremum principle is used to calculate the interstitial solute concentration profile for specified interface motions. These results are compared with those obtained for a constant diffusivity equal to a weighted average of the concentration-dependent diffusivity and to a variety of simple approximations to the full problem.
AB - Phase transformation theory applicable to reaustenitisation that takes place upon heating low-alloy steels is described. The assumption of local equilibrium is made. Diffusivity of interstitial solute in austenite is treated as concentration dependent and no diffusion is allowed in cementite and ferrite. Under these assumptions, the process is controlled by the diffusion of the interstitial solute in the growing phase. A variational dual extremum principle is used to calculate the interstitial solute concentration profile for specified interface motions. These results are compared with those obtained for a constant diffusivity equal to a weighted average of the concentration-dependent diffusivity and to a variety of simple approximations to the full problem.
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UR - http://www.scopus.com/inward/citedby.url?scp=0030195333&partnerID=8YFLogxK
U2 - 10.1016/1359-6454(95)00390-8
DO - 10.1016/1359-6454(95)00390-8
M3 - Article
AN - SCOPUS:0030195333
VL - 44
SP - 2861
EP - 2868
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
IS - 7
ER -