Materials Technology (ME-303) - Important Questions

Explain ductility, hardness and creep, how they influence behaviour under stress, how they are measured and their importance in material selection.

Define atomic packing factor and derive/calculate it for SC, BCC and FCC crystals.

Explain the different types of bonds found in metals and their effect on material properties.

Draw the Fe-Fe3C / Iron-Carbon phase diagram and explain the phases and phase transformation reactions.

Draw and explain the T-T-T (time-temperature-transformation) diagram for steel / iron-carbon alloy, its working and information supplied and relevance in heat treatment.

Describe the major characteristics of alloying elements and their role in modifying the properties of base metals.

Describe the cooling curves and their importance in understanding the solidification process of alloys.

What is case carburizing? Explain its purpose and process.

Explain common heat treatment processes for metals such as annealing, normalizing and hardening and their effects on properties.

Define cyaniding and explain its application in surface hardening of steels.

What is the Charpy impact test and how does it assess material toughness?

Describe non-destructive tests for the detection of cracks in metals.

List main alloys of aluminium and nickel and discuss their engineering applications.

Draw and annotate the stress-strain curve for polycrystalline / mild-steel materials showing yield point, ultimate tensile strength and fracture point.

Discuss/describe the different chemical reagents used in the metallurgical industry and their purposes.

What is spot test and how is it used for determination of metals in qualitative analysis?