fig6
Figure 6. Evolution of the volume fraction of the BCC phase (martensite + bainitic ferrite) in AIH processes with holding temperatures of (A) 300 °C (above Ms); and (B) 250 °C; (C) 230 °C; and (D) 200 °C (below Ms). For comparison, the volume fractions of the BCC phase in DIH processes are included. VBCC-c: Volume fraction of BCC formed during cooling; VBCC-f: Volume fraction of BCC at ambient temperature after the process. BCC: body-centered cubic; AIH: ausforming and isothermal holding; Ms: martensite start temperature; DIH: direct isothermal holding.
