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 engineering materials and give their classification based on properties and applications.

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

Explain ductility, malleability, toughness and brittleness and their significance in materials engineering

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

Define crystal imperfection and explain it.

Explain Miller indices for denoting crystal planes.

Differentiate between primary creep, secondary creep and tertiary creep

What is coordination number? Determine it for simple cubic, FCC and HCP (BCC) systems.

What is crystal / space lattice and how many types of lattices are found in metals?

Explain dispersion bonds and dipole bonds.

Explain the effect of grain size on mechanical properties

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.

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

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

Describe the working of the iron-carbon diagram and discuss its advantages and limitations for heat treatment.

Explain the concept of eutectoid solid solution and its significance in steel-making.

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

Explain the elastic, anelastic and visco elastic behaviour of material.

Explain the effects/influences of alloying elements such as $\text{Al}$, $\text{Cr}$, $\text{Ni}$, $\text{Mo}$, $\text{Si}$, $\text{Mn}$, $\text{V}$ and $\text{Cu}$ in steel.

Explain the Hume-Rothery governing rules for the formation of substitutional solid solutions.

Explain the relationship between equilibrium phase diagrams and properties of alloys.

Draw the phase diagram for a binary system showing solubility in liquid and solid state.

Explain the role of solvus curve in phase diagrams for age-hardenable alloys.

What is case carburizing? Explain its purpose and process.

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

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

Explain briefly the theory of tempering and the process of austempering and martempering.

Explain austenite and martensite and describe how martensite forms by martensite transformation in steel

Explain the terms pearlite, cementite and martensite

Explain flame hardening and ion implantation as methods of surface treatment for metals.

What are the objectives of heat treatment and what are the various heat treatment processes?

State and explain the difference between case hardening and surface hardening and list their various processes.

What is quench severity and what is its role in hardening of steels?

Explain the processes of austempering and martempering

What are common defects observed during heat treatment and precautions for their prevention?

List main ores of chromium and describe their properties and uses in metallurgical industry.

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

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

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

Classify steel and describe properties and uses of each type.

List main ores of manganese and describe their properties and industrial uses.

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

Describe commercial alloys of aluminium, their compositions and uses.

Define the term Hardenability. What factors affect hardenability? Describe a method for determining the hardenability of steel.

Define fatigue failure and explain how a fatigue test is carried out.

What is Babbitt? Give composition and uses.

Explain the factors affecting the fatigue strength of a material.

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?

Write short notes on / describe volumetric and gravimetric analysis and their roles in the chemical analysis of metals.

Explain/describe optical and spectrophotometric analysis and its use in the metallurgical industry.