Miettinen, J., Koskenniska, S., Visuri, VV. et al. Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys. Metall Mater Trans B 51, 2946–2962 (2020). https://doi.org/10.1007/s11663-020-01973-y
Thermodynamic, kinetic, and microstructure data for modeling solidification of Fe-Al-Mn-Si-C alloys
|Author:||Miettinen, Jyrki1; Koskenniska, Sami2; Visuri, Ville-Valtteri1;|
1Process Metallurgy Research Unit, University of Oulu, PO Box 4300, 90014, Oulu, Finland
2Materials and Mechanical Engineering Research Unit, University of Oulu, PO Box 4200, 90014, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 1.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202101192093
|Publish Date:|| 2021-01-19
In this study, a set of thermodynamic, kinetic, and microstructure data is presented to simulate the non-equilibrium solidification of Fe-Al-Mn-Si-C alloys. The data were further validated with the experimental measurements and then used in a thermodynamic–kinetic software, IDS, to establish the effect of the alloying and cooling rate on the solidification behavior of high-AlMnSi (Al ≥ 0.5 wt pct, Mn ≥ 2 wt pct, Si ≥ 1 wt pct) steels. The modeling results were additionally validated by conducting electron probe microanalysis (EPMA) measurements. The results reveal that (1) solidification in high-AlMnSi steels occurs at much lower temperatures than in carbon steels; (2) increasing the cooling rate marginally lowers the solidus; (3) the microsegregation of Mn in austenite is much stronger than that of Si and Al due to the tendency of Al and Si to deplete from the liquid phase; (4) the residual delta ferrite content may be influenced by a proper heat treatment but not to the extent that could be expected solely from thermodynamic calculations; (5) in high-AlMnSi steels containing less than 0.2 wt pct carbon, the cracking tendency related to the strengthening above the solidus and the shell growth below the solidus may be much lower than in carbon steels.
Metallurgical and materials transactions. B, Process metallurgy and materials processing science
|Pages:||2946 - 2962|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
215 Chemical engineering
216 Materials engineering
The research was conducted within the framework of the Genome of Steel project funded by the Academy of Finland (Project #311934). Open access funding provided by University of Oulu including Oulu University Hospital.
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