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In this example, the growth and coarsening behavior of MnS precipitates for three electrical steel grades during hot deformation is investigated. The specimens were solution treated at 1300°C for 30min and afterwards immediately cooled to test temperature and a constant stress was applied. Precipitation of MnS occurs simultaneously on grain boundaries and dislocations. 

Figure 1 and 2 show the calculated radius versus time curves of MnS precipitation in three different alloys at temperatures of 800, 900 and 1000°C. Figure 1 summarizes simulation results for MnS precipitates located at grain boundaries, whereas precipitates at dislocations are shown in Figure 2.


Figure1: Calculated and experimental mean radii of MnS located at grain boundaries for various temperatures




Figure2: Calculated and experimental mean radii of MnS located at dislocations for various temperatures