Syllabus Material Science - (2403114/2043114/2393114) Theory Term work Pract / Oral Total Internal Assessment End Sem Exam Exam Duration (in Hrs) Test 1 Test 2 Total 20 20 40 60 2 - - - - 100 Sr. No. Name of Module Detailed Content I. Introduction to Crystals and Imperfections Classification of materials : Introduction to engineering materials, significance of structure property correlations in all classes of engineering materials. Concepts of crystals - Crystalline and Non-crystalline Materials Unit cell, Crystal structures of metals, Crystal systems, Crystallographic planes and directions, Crystal Defects : Crystal Imperfections-definition, classification and significance of imperfections, point defects, line defects, Surface defects and volume defects. Importance of dislocations in deformation and its mechanisms. Critical resolved shear stress, Slip systems and deformability of FCC, BCC and HCP lattice systems. (Chapter - 1) II. Hot -Cold Working mechanisms Concept of Recrystallization, effects and mechanism of cold work and hot work, Need for Recrystallization Annealing, the stages of recrystallization annealing and factors affecting. (Chapter - 2) III. Crystallization & Phase Transformations Nucleation-Homogeneous and Heterogeneous Nucleation and Growth. Solidification of metals and alloys, Cooling curves. Classification of Alloys based on phases and phase -diagrams Binary alloy phase diagrams - Isomorphous, Eutectics type I and II, Peritectic. (Chapter - 3) IV. Iron-Iron carbide phase diagram Invariant reactions, microstructural changes of hypo and hyper-eutectoid steel, Solidification of different alloys from the Iron-Iron carbide diagram, TTT and CCT diagram -Hardenability and its tests, Graphitization in cast irons. (Chapter - 4) V. Heat treatment & Alloy Steel Objectives, Thorough treatments : Annealing and types, normalizing, hardening and tempering. Isothermal treatments austempering and martempering. Surface hardening processes : Carburizing, Nitriding, Cyaniding and Carbonitriding, induction and flame hardening. Alloy steels-Stainless steels, Tool steels, Maraging steels and Ausformed steels. (Chapter - 5) VI. Fracture & Failure Mechanism Fracture of metals, Ductile Fracture, Brittle Fracture, Ductile to Brittle Transition Temperature (DBTT), Griffith’s criteria and Orowan’s modification. Fatigue/Endurance limit of ferrous and non-ferrous metals, Fatigue test, S-N curves, factors affecting fatigue, structural changes accompanying fatigue. Creep, mechanism of creep, stages of creep and creep test, creep resistant materials. (Chapter - 6)
