Constitution of Alloys and Phase Diagrams

Constitution of Alloys and Phase Diagrams

Learning Objectives

While reading and after studying this chapter, you will be able to:

● Understand the formation of solid solu- tions and differentiate between substitutional and interstitial solid solutions. 

● Appreciate the concepts, principles and uses of phase diagrams.

● Construct the phase diagrams from the liquid-solid cooling curves.

● Learn the basic rules for the interpretation of phase diagrams.

● Know the concepts of binary isomorphous temperature-composition phase diagrams.

● Construct and understand the phase dia- grams for binary eutectic alloy systems. 

● Analyse the importance of invariant re- actions eutectic, pertitectic, eutectoid, and peritectoid-in the phase diagrams. 

● Understand how the form of a phase diagram can influence the properties of alloys.

● Identify the major microstructural constituents of iron-carbon alloys and un- derstand their compositional and structural characteristics.

● Understand the iron-carbon phase dia- gram and its significance on the trans- formation of various types of steels and cast irons.