Carburization of austenitic and ferritic stainless steels in liquid sodium: Comparison between experimental observations and simulations
Source abstract
Abstract
Three steels were exposed in carburizing sodium at 600 and 650 °C. The kinetics and extent of carburization were characterized. Numerical simulations using the coupled thermodynamic-kinetic modeling software DICTRA were performed. It was proposed that the observed carbon diffusion profiles were induced by the combined diffusion of carbon in the grains and at grain boundaries coupled with the slow formation of carbides. The blocking effect of carbides on the carbon diffusion was observed to evolve as a function of time and microstructure. Acceptable agreement between experimental and simulated intragranular carbon profiles was achieved by optimizing the labyrinth factor and phases.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Hydrogen embrittlement and corrosion behaviors in metals · Metallurgical Processes and Thermodynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
Show source-provided references
1. Hugot · 1999
2. Carburization of austenitic stainless steel in liquid sodium
3. Carburization of austenitic and ferritic alloys in carbon-saturated sodium at 916 K10.1179/030716974803288220 ↗
4. Carburation d’acier 316 par transfert de carbone dans le sodium
5. Thorley · 1984
6. Proposition d’une loi enveloppe de carburation des gaines d’éléments absorbants
7. Dickson · 1988 · vol. 2
8. Crank · 1957
9. Dictra, a tool for simulation of diffusional transformations in alloys10.1361/105497100770340057 ↗
10. Computer simulation of diffusion in multiphase systems10.1007/BF02652288 ↗
11. Carbon diffusion and phase transformations during gas carburizing of high-alloyed stainless steels: Experimental study and theoretical modeling10.1007/s11661-005-0271-4 ↗
12. Carburization behavior of aisi 316ln austenitic stainless steel – experimental studies and modeling10.1016/j.jnucmat.2010.05.023 ↗
13. Experimental investigations and dictra simulations on formation of diffusion-controlled fcc-rich surface layers on cemented carbides10.1016/j.apsusc.2011.05.024 ↗
14. Thermodynamic simulation of low temperature colossal carburization of austenitic stainless steel10.1016/j.proeng.2015.12.296 ↗
15. A finite difference model describing carburization in high-temperature alloys10.5006/1.3584919 ↗
16. A mathematical model describing carburization in multielement alloy systems10.1007/BF02650138 ↗
17. Aufkohlung von chrom-nickel-eisen-stählen in der kohlenstoffpackung10.1002/maco.19760270502 ↗
18. Enthalpy of formation of disodium acetylide and of monosodium acetylide at 298.15 k, heat capacity of disodium acetylide from 5 to 350 k, and some derived thermodynamic properties10.1016/S0021-9614(73)80063-1 ↗
19. The solubility of carbon in sodium10.1016/0022-3115(74)90172-X ↗
20. Carburization of austenitic and ferritic steels in carbon-saturated sodium: preliminary results on the diffusion coefficient of carbon at 873 k10.1007/s11085-017-9733-5 ↗
21. Sub-micrometre depth-gradient measurements of phase, strain and texture in polycrystalline thin films: a nano-pencil beam diffraction approach10.1107/S1600576714000557 ↗
22. Observation using synchrotron x-ray diffraction of the crystallographic evolution of alpha-titanium after oxygen diffusion10.1080/09500839.2015.1014876 ↗
23. Rietveld texture analysis from synchrotron diffraction images. I. Calibration and basic analysis10.1017/S0885715613001346 ↗
24. A homogenization approach to diffusion simulations applied to α + γ Fe-Cr-Ni diffusion couples10.1016/j.actamat.2006.01.020 ↗
25. Multiphase diffusion simulations in 1D using the dictra homogenization model10.1016/j.calphad.2009.06.004 ↗
26. A new labyrinth factor for modelling the effect of binder volume fraction on gradient sintering of cemented carbides10.1016/S1359-6454(02)00515-3 ↗
27. Gradient zones in wc-ti(c,n)-co-based cemented carbides: experimental study and computer simulations10.1016/S1359-6454(00)00029-X ↗
28. Carbides in an aluminised single crystal superalloy: tracing the source of carbon10.1016/j.surfcoat.2015.12.066 ↗
29. Haynes · 2014
30. Pearson · 1968
31. Effect of alloying addition on the lattice parameter of austenite
32. Structural characteristics of low temperature plasma carburised austenitic stainless steel10.1179/026708399101505077 ↗
33. Colossal carbon supersaturation in austenitic stainless steels carburized at low temperature10.1016/S1359-6454(03)00235-0 ↗