In the present study, the effects of Al content on the evolution of inclusions formed in Fe–16Mn–xAl–0.6C high Mn TWIP steels were investigated experimentally and discussed based on the thermodynamic calculation with FactSage. The results showed that with the increase of Al content from 0.002 to 2.1 wt-% in the steels, the evolution route of the main oxide inclusions is MnO → Al2O3 → MgAl2O4 → MgO, the main sulphide inclusion is changed from MnS to MgS, and the dominant stable inclusion changes along the route of MnO → Al2O3/MnS → MnS → AlN. The main inclusion types in thermodynamic calculation results with FactSage are consistent with the observed results in the present experimental steels.
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