Rashesh Naik – Sujit Nakrani – Sachin Pal – Dhananjay Panchal Structure – Properties- Performance Correlation

Structure – Property – Performance Relation Properties of a particular material are formed due to the internal structure It is basically related to the specific arrangement of the atoms

Structure – Performance – Performance Relation Property is a specific response which is offered by the material against the imposed external environment Apart from structures and properties, the other important components are processing and performance Structure of a material mainly depends on how the material is processed So the relation between structure,properties and performance are corelated

The material selection process The interrelationship between structure, properties and performance plays a very crucial role in the selection of the material Hence in order to select the proper material it is important to study and understand the relation The procedure in selecting the material is given as follows

The material Selection process Pick Application - Determine required properties Properties : mechanical, electrical, thermal, optical, magnetic. Properties – Identify the suitable material Material : structure, composition Material – Identify required processing Processing : changes the structure and overall shape Example – casting, sintering, forming, joining

(a) 30  m (b) 30  m (c) 4 m4 m (d) 30  m Hardness (BHN) Cooling Rate (ºC/s) The properties of a material depends upon a structure(strenght or hardness) The processing can change the structure of the material. It is evident from the graph above

Properties Some of the basic properties of a materials are as follows

Electrical Properties (of Copper): T (°C) Cu at%Ni Cu at%Ni deformed Cu at%Ni Resistivity,  (10 -8 Ohm-m) 0 Cu at%Ni “Pure” Cu Electrical Resistivity of Copper is affected by: Contaminate level Degree of deformation Operating temperature

THERMAL Properties Space Shuttle Tiles: --Silica fiber insulation offers low heat conduction. Thermal Conductivity of Copper: --It decreases when you add zinc! Composition (wt% Zinc) Thermal Conductivity (W/m-K)  m

MAGNETIC Properties Magnetic Permeability vs. Composition: --Adding 3 atomic % Si makes Fe a better recording medium! Magnetic Storage: --Recording medium is magnetized by recording head. Magnetic Field Magnetization Fe+3%Si Fe

Optical Properties of Ceramic are controlled by “Grain Structure” Grain Structure is a function of “Solidification” processing! :

The end