Chapter 5. Phase Diagrams

When two metals are mixed together to form an alloy, three things can happen: the two elements mix together and they form a solid solution; the two elements do not mix and separate into different phases and they form a phase mixture; or the two elements bond strongly to each other and form a compound. Phase diagrams represent the behavior of binary alloys as they solidify from the melt: they indicate what phases form for each composition and temperature. Phase diagrams offer guidance on how to process alloys in order to obtain the desired mechanical properties described in Chapters 2 and 4.

Learning Objectives

After studying this chapter, the student will be able to:

  1. Sketch the phase diagram of a solid solution and ...

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