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Title: Basic Engineering Materials and their Properties
Description: This note deals with the basic and must have knowledge of Engineering materials. It contains all the required information of the different engineering materials that are used every day with unique exceptions and notes. Must have note for competitive exam aspirants.
Description: This note deals with the basic and must have knowledge of Engineering materials. It contains all the required information of the different engineering materials that are used every day with unique exceptions and notes. Must have note for competitive exam aspirants.
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Engineering Materials and their Properties
2
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The machine elements should be made of such a material which has properties suitable for the
conditions of operation
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In this note, we shall discuss the commonly used engineering materials and their properties in
Machine Design
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2 Classification of Engineering Materials
The engineering materials are mainly classified as :
1
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2
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The metals may be further classified as :
(a) Ferrous metals, and (b) Non-ferrous metals
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The non-ferrous metals are those which have a metal other than iron as their main
constituent, such as copper, aluminum, brass, tin, zinc, etc
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The best material is one which serve the desired objective at the
minimum cost
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Availability of the materials,
2
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The cost of the materials
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We shall now discuss
the physical and mechanical properties of the material in the following article
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4 Physical Properties of Metals
The physical properties of the metals include luster, colour, size and shape, density, electric and
thermal conductivity, and melting point
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2
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These mechanical properties of the metal include
strength, stiffness, elasticity, plasticity, ductility, brittleness, malleability, toughness, resilience,
creep and hardness
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Strength
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The internal resistance offered by a part to an externally applied force is called
*stress
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Stiffness
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The modulus of
elasticity is the measure of stiffness
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Elasticity
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This property is desirable for materials used in tools and
machines
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4
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It is property of a material which retains the deformation produced under load
permanently
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5
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It is the property of a material enabling it to be drawn into wire with the
application of a tensile force
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The ductility is
usually measured by the terms, percentage elongation and percentage reduction in area
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Note : The ductility of a material is commonly measured by means of percentage elongation
and percentage reduction in area in a tensile test
...
Brittleness
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It is the property of breaking
of a material with little permanent distortion
Title: Basic Engineering Materials and their Properties
Description: This note deals with the basic and must have knowledge of Engineering materials. It contains all the required information of the different engineering materials that are used every day with unique exceptions and notes. Must have note for competitive exam aspirants.
Description: This note deals with the basic and must have knowledge of Engineering materials. It contains all the required information of the different engineering materials that are used every day with unique exceptions and notes. Must have note for competitive exam aspirants.