Physical Metallurgy — Winter 2020

Define: Crystal, Unit cell, lattice point

Describe the crystal system as per the lattice parameter.

Draw Fe-Fe Cdiagram and explain all invariant reaction in this diagram.3

Describe closest packed plane and direction for BCC and FCC.

Draw crystal planes and direction of followings:

( 1 0 1) b) (3 2 1) c) [1 1 1] d) [1 1 1]

Classify the cast iron according to graphite morphology and matrix structure. Describe any two cast irons with composition, microstructure and applications.

Determine the atomic packing factor for FCC structure.

Explain constitutional supercooling.

Explain the lever rule by using phase diagram. What is use of lever rule?

Define: Phase, Degree of freedom, Alloy

Explain coding of steel according to IS standard and American standard.

Draw cooling curve for pure metals, alloys, and eutectic and explain each point of curve.

What do you mean by polymorphism in material science?

Why FCC structure is more ductile than BCC and HCP structure?

With the concept of free energy explain the homogeneous nucleation.

What do you mean by curie temperature? Give examples.

Draw the microstructure of eutectoid steel.

Give the Hume-Rothery’s rules for substitutional solid solution.

Draw the graph for RN and RG versus temperature and explain the same.

Draw phase diagram for Isomorphous system.

What are the procedural steps to be performed to see the microstructure under microstructure of any metals? What is the name of the procedure?

What is the basic difference between bright field illumination and dark field illumination?

Draw liquidus line, solidus line, solvus line and eutectic in phase diagram.

Explain the phase diagram for completely soluble in liquid phase and insoluble in solid phase.