MATERIALS TESTING DEEPAK KOZHUMMAL VAIKKATH GANESH BHARATH KUMAR NEILOY GEORGE CHAKRABORTHY

MATERIALS TESTING TENSILE TESTBEND TEST IMPACT TEST 1.IZOD 2.CHARPYS BRINELL’S HARDNESS TEST

TENSILE TESTS. The tensile testing machine pulls the sample from both ends and measures the force required to pull the specimen apart and how much the sample stretches before breaking.

MODULUS OF ELASTICITY  Definition: When a material is subjected to an external load it becomes distorted or strained.  With metals, provided the loading is not too great, they return to their original dimensions when the load is removed, i.e. they are elastic.  Within the limits of elasticity, the ratio of the linear stress to the linear strain is termed the modulus of elasticity or more commonly known as Young's Modulus.

IZOD IMPACT TEST  A pendulum swings on its track and strikes a notched, cantilevered sample. The energy lost (required to break the sample) as the pendulum continues on its path is measured from the distance of its follow through.

BEND TESTS  Ductility is the physical property of being capable of sustaining large plastic deformations without fracture (in metals, such as being drawn into a wire). It is characterized by the material flowing under shear stress. physical propertyplastic deformationsfracturemetals flowingshear stressphysical propertyplastic deformationsfracturemetals flowingshear stress  A ductile material is any material that yields under shear stress (as opposed to brittle fracture, which yields under normal stress shear stress brittlenormal stress shear stress brittlenormal stress

CHARPY IMPACT TEST  Definition: A pendulum- type single-blow impact test in which the specimen usually notched, is supported at both ends as a simple beam and broken by a falling pendulum.  The energy absorbed, as determined by the subsequent rise of the pendulum, is a measure of impact strength or notch

CHARPY’S IMPACT TEST

BRINELL HARDNESS TEST  Definition: The Brinell hardness test for steel, involves impressing a ball 10 mm diameter, of hard steel or tungsten carbide, with a loading of 3000 kilograms into the steel surface.  The hardness of the steel is then determined by measurement of the indentation. This is applicable for various other specimen also.

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