Universal Testing Machine (UTM)

A universal testing machine is used to test the tensile stress and compressive stress of materials. It is named after the fact that it can perform many standard tensile and compression tests on materials, components, and structures. It has the following units        Loading unit:            In this unit the specimen is clamped and the desired load is applied. It consist of the following components:         Table         Table...

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Yield and Ultimate strength

Definition of Yield strength:             The yield strength or yield point of a material is defined as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its original shape when the applied load is removed. Importance: Knowledge of yield point is vital when designing a component since it generally represents an upper limit of the load that can be applied. Formula :           ...

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FIVE BASIC ELEMENTS OF MPI

SOURCE:- Source produces the probing medium or investigating medium. In this MPI test the current is the source element. MODIFICATION:             The ability to change or vary the magnetic field if there is any crack or discontinuity in the specimen. Here in the MPI test the current is the modifying element. DETECTION:      The material which detect that how much change occur in the magnetic field around the specimen. Here the iron magnetic particle...

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Magnetic Particle Testing Inspection

Magnetic particle testing is accomplished by inducing a magnetic field in a ferromagnetic material and then dusting the surface with iron particles. The surface will produce magnetic poles and distort the magnetic field in such a way that the iron particles are attracted and concentrated making defects on the surface of the material visible. How to perform the test: First put the specimen into the A.C current carrying coil and then take the specimen into the beaker. And pour some kerosene oil into the beaker and put some iron powder in...

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Non Destructive Test

Nondestructive testing (NDT) use test methods to examine an object, material or system without impairing its future usefulness. Non-destructive testing is often required to verify the quality of a product or a system. Various types of commonly performed NDT are 1.       Eddy Currents inspection 2.       Magnetic Particle Inspection (MPI or MT) 3.       Radiography 4.       Ultrasonics 5.      ...

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Evaporator ( In a refrigeration System)

Function of evaporator: ·         In a refrigeration system, an evaporator is a device which enables a volatile liquid to vaporize for the purpose of removing heat from a refrigerated space or product. ·         It is one of the main components in a refrigeration system. ·         A refrigerant before entering the...

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