Review of Engineering Materials- metals, alloys- ferrous & non-ferrous, plastics & polymers,Ceramics and composites. Dual phase steels, micro alloyed steels, High strength low alloy steels,Transformation inducted plasticity (TRIP) steels, Maraging steels. Heat treatment of ferrous and nonFerrous alloys for modification of structure and properties such as Al-Si alloy, 60-40 Brass

DEC12

1. A) Describe the following heat treatments ~ annealing, conventional hardening,Case hardening, tempering with respect to:i) Objectives of the heat treatment,ii) When is this heat treatment is applied andiii) Applications of the end product after a given heat treatment.12

b) Write the material properties and applications of TRIP steels. 4

JUNE13

Ql) a) Differentiate the following steels with respect to the composition,Properties, heat treatment given and areas o f application i) Maraging steels,ii) HSLA steels,

iii) Dual phase steels,iv) TRIP steels. : [12]

b) State the objectives of normalizing and conventional hardening heatTreatment [4]

Q4) Short note on

Heat treatment of 60 - 40 brass.

DEC-14

Q1 a) compare HSLA with maraging steels in terms of [10]i) Alloying elements and its concentrations,ii) Microstructure,lii) Heat treatment, if any andiv) Mechanical Properties

b) In what ways do alloying elements, other than carbon, affect the properties?Of steel? Enlist any two advantages of plain carbon steels-over alloyedSteels? 6

a) Name the additives incorporated in the polymers. What is the effect of?

These additives on the properties of the polymers? 8

a) Comparison of mechanical and thermal properties of metals, polymersAnd ceramics (a table with range of property-values expected)

MAY15

1 a) Compare the following heat treatments used in steelsi) Annealing and normalizingii) Carburizing and nitridingiii) Hardening and tempering 12

b) Differentiate between HSLA and maraging steels.4

Q4) Write short notes on

b) Dual phase steels