Hookes Law
When a material behaves elastically and exhibits a linear relationship between stress and strain, it is called linearly elastic. In
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Stress strain graph for various types of steel/material
All the grades of steel have the same Young’s modulus but different yield stresses. where, σ= Stress, Ductile material :
Read MoreStress and Strain
Stress and Strain Stress It is the resistance offered by a body to deformation. Nominal stress (Engineering stress) = Load/
Read MoreSurface Imperfection/Interfacial Defects
Imperfections on crystal surface are surface imperfections. These imperfections have a thickness of a few atomic diameter. These are boundaries
Read MoreAngle of Repose
The maximum angle of inclination of an inclined plane with horizontal for which a body lying on the inclined plane
Read MoreAngle of Friction (φ)
Consider a body A which is just about to move on plane under external applied force F. The W is
Read MoreCoefficient of Friction
The limiting friction force fL is directly proportional to the normal reaction between two bodies in contact. fL ∝ N
Read MoreLaws of Friction
Static Friction The force of friction always acts in a direction opposite to the impending motion. The limiting force of
Read MoreTypes of Friction
The friction is of the following types : Static friction: It is the friction experienced by two bodies in contact
Read MoreIntroduction to Friction
When a body moves or tends to move on another body, the property of two bodies by virtue of which
Read MoreCommon Alloy Steels
Some of the popular alloy steels are : Silicon steel Nickel steel Chrome-Vanadium steel Chrome-Molybdenum steel Manganese steel Vanadium steel
Read MoreEffect of alloying elements on steel
1. Carbon : Carbon content in steel affects Hardness Machinability Tensile strength Melting point 2. Nickel : Increases toughness and
Read MoreFlame Hardening
Flame Hardening The process consists of heating the surface of medium carbon steel by high temperature gas flame at 2400°C
Read MoreInduction hardening
This process is employed to increase hardness, wear resistance and endurance limit of the surface of the work piece, the
Read MoreCarburizing
Carburizing is a case-hardening process in which carbon is added to the surface of low carbon steel. Thus, carburized steel
Read MoreCase Hardening or Surface Hardening
Hard Surfaces are produced on relatively soft materials by case hardening. The parts which are subjected to wear and impact
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