MATS 3011 Lecture Notes - Phase Boundary, Austenite, Phase Diagram
Document Summary
Provide valuable info about melting, crystallization, development of microstructure of an alloy. System: things under study or analysis thing = material you need to make. Phase: homogeneous portion a system with uniform properties. Components: species that make up a system (can be pure element or compounds) Equilibrium: terminal state that systems tend to reach when you wait for a long time. Component = 1, water vaporization curve triple point: where solid, liquid, and gas are at eqbm at 1 t and 1 p must give enough time at each phase to reach eqbm. Can also keep t constant but change p. 1 atm melting curve liquid solid vapor sublimation curve. Phase diagrams, given p & t --> tells about phase(s) we will have w/ 1 component, unary phase diagram. 2 components --> binary phase idagram example 2: phase diagram for iron. Iron (ferrite) (bcc) -------->(912oc) -iron (austenite) (fcc) ------------>(1394oc) -ferrite (bcc) -----------------> (1538oc) liquid (it melts)
