Advanced High-strength (AHS) Steels Containing Al, Mn, Si, and C

High temperature equilibria, and specifically the peritectic reaction, is of significant importance in continuous casting practice. The TCS Steel and Fe-alloys Database (TCFE) uses data from the latest thermodynamic assessments [2017Zhe] and systematic DSC measurements in C-Fe-Mn-Si and Al-C-Fe-Mn-Si systems [2016Pre; 2015Moo].

Al-C-Fe-Mn-Si

Calculated isoplethal section of Fe-2.12Mn-0.77Al-0.54Si-xC. 

Figure 1: Calculated isoplethal section of Fe-2.12Mn-0.77Al-0.54Si-xC. 

C-Fe-Mn-Si

Calculated isoplethal section of Fe-2.75Mn-1.11Si-0.097Al-0.014Ti-0.02Nb-xC.

Figure 2: Calculated isoplethal section of Fe-2.75Mn-1.11Si-0.097Al-0.014Ti-0.02Nb-xC. 

References

[2015Moo] S. C. Moon, The peritectic phase transition and continuous casting practice, PhD thesis, University of Wollongong, Australia (2015).

[2016Pre] P. Presoly, J. Six, and C. Bernhard, Thermodynamic optimization of individual steel database by means of systematic DSC measurements according the CALPHAD approach, IOP Conf. Ser. Mater. Sci. Eng., 119 (1), 12013 (2016).

[2017Zhe] W. Zheng, X. Lu, Y. He, L. Li, Thermodynamic modeling of Fe-C-Mn-Si alloys, J. Iron Steel Res. Int. 24, 190–197 (2017).