Understand the building blocks of engineering with our BME303 VTU Notes. Master crystal structures, phase diagrams, and heat treatment for the 2022 Scheme at the all-new vtubuddy.in Mechanical Science resource portal.
Understand the building blocks of engineering with our BME303 VTU Notes. Master crystal structures, phase diagrams, and heat treatment for the 2022 Scheme at the all-new vtubuddy.in Mechanical Science resource portal.
Introduction: Classification of materials, crystalline and non-crystalline solids, atomic bonding: Ionic Bonding and Metallic bonding.
Crystal Structure: Crystal Lattice, Unit Cell, Planes and directions in a lattice, Planar Atomic Density, Coordination number, atomic Packing Factor of all the Cubic structures and Hexa Close Packed structure. Classification and Coordination of voids, Bragg’s Law.
Imperfections in Solids: Types of imperfections, Point defects: vacancies, interstitials, line defects, 2-D and 3D-defects, Concept of free volume in amorphous solids. Slip, Twinning.
Alloy Systems: Classification of Solid solutions, Hume- Rothery Rules
Diffusion: Diffusion Mechanisms: Vacancy Diffusion and Interstitial Diffusion, Fick’s laws of diffusion, Factors affecting diffusion.
Phase Diagrams: Gibbs Phase Rule, Solubility limit, phase equilibrium and Phase Diagrams: Isomorphous systems, Invariant Binary Reactions: Eutectic reaction, Eutectoid reaction and Peritectic reaction, Lever Rule, Iron-Carbon Diagram. Effect of common alloying elements in steel. Numerical on Lever rule.
Nucleation and growth: Introduction to homogeneous and heterogeneous nucleation, critical radius for nucleation.
Heat treatment: Annealing, Normalizing, hardening, Tempering, Nitriding, Cyaniding, Induction Hardening and Flame Hardening, Recent advances in heat treat technology. TTT diagram, Recovery-Recrystallization-Grain Growth. Strengthening mechanisms: Strain hardening, Precipitation hardening (Solid-Solution Strengthening), Grain refinement
Surface coating technologies: Introduction, coating materials, coating technologies, types of coating: Electro-plating, Chemical Vapor Deposition(CVD), Physical Vapor Deposition(PVD), High Velocity Oxy-Fuel Coating, advantages and disadvantages of surface coating.
Powder metallurgy: Introduction, Powder Production Techniques: Different Mechanical methods: Chopping or Cutting, Abrasion methods, Machining methods, Ball Milling and Chemical
method: Chemical reduction method. Characterization of powders (Particle Size & Shape Distribution), Powder Shaping: Particle Packing Modifications, Lubricants & Binders, Powder Compaction & Process, Sintering and Application of Powder Metallurgy.
Engineering Materials and Their Properties: Classification, Ferrous materials: Properties, Compositions and uses of Grey cast iron and steel. Non-Ferrous materials: Properties, Compositions and uses of Copper, Brass, Bronze. Composite materials – Definition, classification, types of matrix materials & reinforcements, Metal Matrix Composites (MMCs), Ceramic Matrix Composites (CMCs) and Polymer Matrix Composites (PMCs), Particulate-reinforced and fiber- reinforced composites, Applications of composite materials.
Mechanical and functional properties of Engineering Materials
The Design Process and Materials Data: Types of design, design tools and materials data, processes of obtainingmaterials data, materials databases. Material Selection Charts: Selection criteria for materials, material property Charts, deriving property limits and material indices.
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