PH 8251 Materials Science Previous Year Question Paper Download
- To introduce the essential principles of materials science for mechanical and related engineering applications.
UNIT I PHASE DIAGRAMS
Solid solutions – Hume Brother’s rules – the phase rule – single component system – one-component system of iron – binary phase diagrams – isomorphic systems – the tie-line rule – the lever rule – application to isomorphic system – eutectic phase diagram – peripatetic phase diagram – other invariant reactions – free energy composition curves for binary systems – micro structural change during cooling.
UNIT II FERROUS ALLOYS
The iron-carbon equilibrium diagram – phases, invariant reactions – micro structure of slowly cooled steels – eutectic steel, hypo and hyperthyroid steels – effect of alloying elements on the Fe-C system – diffusion in solids – Fisk’s laws – phase transformations – T-T-T-diagram for eutectic steel – Pearlie, Banting and martensite transformations – tempering of martensite – steels – stainless steels – cast irons.
UNIT III MECHANICAL PROPERTIES
Tensile test – plastic deformation mechanisms – slip and twinning – role of dislocations in slip – strengthening methods – strain hardening – refinement of the grain size – solid solution strengthening – precipitation hardening – creep resistance – creep curves – mechanisms of creep – creep-resistant materials – fracture – the Griffith criterion – critical stress intensity factor and its determination – fatigue failure – fatigue tests – methods of increasing fatigue life – hardness – Rockwell and Brine ll hardness – Snoop and Nickers micro hardness.
UNIT IV MAGNETIC, DIELECTRIC AND SUPERCONDUCTING MATERIALS
Ferromagnetic – domain theory – types of energy – hysteresis – hard and soft magnetic materials – ferries – dielectric materials – types of polarization – Angevin-Deb ye equation – frequency effects on polarization – dielectric breakdown – insulating materials – Microelectronic materials – superconducting materials and their properties.
UNIT V NEW MATERIALS
Ceramics – types and applications – composites: classification, role of matrix and reinforcement, processing of fiber reinforced plastics – metallic glasses: types , glass forming ability of alloys, melt spinning process, applications – shape memory alloys: phases, shape memory effect, pseudo elastic effect, Ni Ti alloy, applications – nano materials: preparation (bottom up and top down approaches), properties and applications – carbon nano tubes: types.
PH 8251 Materials Science Previous Year Question Paper for Regulation 2017 Download
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