6) Phase diagram-phase transformation

a) These are two phase diagrams for an alloy of lead and tin from the course book. Explain what it depicts and also explain what is called the "tie line" in the image

b) When adding information about structure in the same diagram: What do the small added images depict

Fig. 11.3(b), Calliater \& Rethwisch 9o. (Adapted from Phase Dogrems or Binary Nickel Alloys, P. Nash, Editor, 1991. Reprinted by permission of ASM International, Materials Park, OH.)