TY - JOUR
T1 - Observations and analysis of the peritectic reaction for Fe-Co Alloys
AU - McDonald, Neill
AU - Sridhar, Seetharaman
N1 - Funding Information:
This work was supported by the MRSEC program of the National Science Foundation under Award Number DMR-0079996 and a National Science Foundation CAREER grant under Award Number DMR-0348818. The authors also wish to thank the professors, students, staff, and member companies of the Center for Iron and Steel-making Research at Carnegie Mellon University for contributing their ideas and assistance with other aspects of this project.
Publisher Copyright:
© 2005 Carl Hanser Verlag, München.
PY - 2005/1/1
Y1 - 2005/1/1
N2 - The thermodynamics and kinetics associated with the peri-tectic transition have become greatly discussed topics. A high-temperature confocal scanning laser microscope has been used to observe the growth of γ-austenite along the pro-peritectic δ-ferrite/liquid-Fe boundary and to measure the rate at which this occurs. It was found, for Fe-18 wt.% Co, Fe-19 wt.% Co, and Fe-20 wt.% Co alloys, that the reaction rate increased with increasing undercooling over the temperature range observed and that there was no discernible difference in rate between the three alloys. The growth rate dependence on undercooling was found to be ν = (62.82 ΔT2-70.90 ΔT + 149.04) ± 15.61 μm s-1. This rate compared well with the growth model proposed by Bosze and Trivedi when the uncertainties in available phase diagram information were considered.
AB - The thermodynamics and kinetics associated with the peri-tectic transition have become greatly discussed topics. A high-temperature confocal scanning laser microscope has been used to observe the growth of γ-austenite along the pro-peritectic δ-ferrite/liquid-Fe boundary and to measure the rate at which this occurs. It was found, for Fe-18 wt.% Co, Fe-19 wt.% Co, and Fe-20 wt.% Co alloys, that the reaction rate increased with increasing undercooling over the temperature range observed and that there was no discernible difference in rate between the three alloys. The growth rate dependence on undercooling was found to be ν = (62.82 ΔT2-70.90 ΔT + 149.04) ± 15.61 μm s-1. This rate compared well with the growth model proposed by Bosze and Trivedi when the uncertainties in available phase diagram information were considered.
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U2 - 10.3139/ijmr-2005-0053
DO - 10.3139/ijmr-2005-0053
M3 - Article
AN - SCOPUS:85124103244
SN - 1862-5282
VL - 96
SP - 304
EP - 310
JO - International Journal of Materials Research
JF - International Journal of Materials Research
IS - 3
ER -