The influence of silicon on the microstructure of a Fe-Mn-Al-C ferritic low-density steel is investigated. The formation of κ-carbide, known to be detrimental to ductility, can be suppressed by reducing the aluminum content to 5 wt. pct. However, the attempt to compensate the light-weighting effect of aluminium by silicon is not desirable because the precipitation of (Fe,Mn)5(Si,Al)C and (Fe, Mn)3(Al, Si) DO3 ordered phase in ferrite grains leads to a serious deterioration in ductility.
Metallurgical and Materials Transactions A 43 (2012) 1731-1735
| Envelope | Coefficients | Filling welds | Hot | Delta |
| Satoh | Fields | Piping | European welds | Poles |
| Mixed | Creep | Extraordinary ductility | Problems | Mechanical stabilisation |
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