FIGURE 4.20 FIGURE 4.21 Phase Transformations in Metais anu Amoys 214 (a) (b) FIGURE 4.22 4.12 Draw diagrams to show how the solid/liquid interface temperature varies as a function of position along the bar for Figs. 4.20, 4.21 and 4.22 . FIGURE 4.20 FIGURE 4.21 Phase Transformations in Metais anu Amoys 214 (a) (b) FIGURE 4.22 4.12 Draw diagrams to show how the solid/liquid interface temperature varies as a function of position along the bar for Figs. 4.20, 4.21 and 4.22