Physical Metallurgy — Summer 2021

Define phase. What kind of changes may take place in material while changing in the phase?

On what factors does the relationship between structure and property depend?

Draw the Fe-Fe Cdiagram neatly and show all labels, reactions,3 temperature, and compositions on a diagram.

What do you mean by an alloy? Give two examples of it.

How the mechanical mixture is formed when the metal gets solidified? Also, draw a microstructure of it.

Explain the concept of supercooling by drawing a cooling curve for pure metals. Derive the formula for the rate of nucleation and critical radius.

Explain the factors governing the substitutional solubility. What is the name of the well-known rule?

Give any two differences between interstitial solid solution and substitutional solid solution.

Why grain boundaries are the favorable site for the nucleation or growth of precipitates?

Write a note on anyone strengthening mechanism.

Derive the atomic packing factor for BCC structure.

Draw and show the difference in the microstructures formed after annealing and normalizing.

Construct the phase diagram of isomorphous by using cooling curves.

Draw the allotropy of the Iron. What is the curie temperature for Iron and cementite?

Draw the graph for the rate of nucleation and rate of growth versus temperature and explain it briefly.

What are the steps for performing metallography? Write the name of etchants for steel.

Why the tempering of the hardened steel is to be carried out?

By Fe-Fe Cdiagram, show the temperature ranges for heat3 treatment processes for hypo, hyper and eutectoid steels.1

Draw the ray diagram of the metallurgical microscope for bright field illumination. Explain the terms like resolution, numerical aperture, and magnification.

Draw the crystal planes of the following: (1 2 3);(1 2 2);(1 0 1)

Describe the crystal system as per the lattice parameter.

Write a short note on the effect of the addition of alloying elements to the steel.

Classify the stainless steel.

Show the liquidus line, solidus line, solvus line, and eutectic in a phase diagram.

Describe any two cast irons with composition, microstructure, and applications.