fig8

Figure 8. Rate of isothermal transformation in AIH and DIH processes as a function of volume fraction of α’ phase at isothermal holding temperatures of (A) 300 °C; (B) 250 °C; (C) 230 °C; and (D) 200 °C. Comparison of the volume fraction of the BCC phase formed during (E) Stage 1 and (F) Stage 2 in AIH and DIH processes, at various isothermal holding temperatures. AIH: Ausforming and isothermal holding; DIH: direct isothermal holding; BCC: body-centered cubic.