Ultrasonic plastic welding is the joining or reforming of thermoplastics through the use of heat generated by the high frequency mechanical movement. It is achieved by converting high frequency electrical energy into high frequency mechanical motion. This mechanical movement, together with the applied force, creates frictional heat on the mating surfaces of the plastic components (joint area) so that the plastic material melts and forms a molecular bond between the parts. The following drawings illustrate the basic principle of ultrasonic weldi ....etc

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http://seminarsprojects.net/Thread-ultrasonic-metal-welding?pid=33399&mode=threaded

http://seminarsprojects.net/Thread-welding-of-metals

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NDT TESTS ON CONCRETE

Rebound Tests
The rebound hammer is a surface hardness tester for which an empirical
correlation has been established between strength and rebound number.
The only known instrument to make use of the rebound principle for
concrete testing is the Schmidt hammer, which weighs about 4 lb (1.8 kg)
and is suitable for both laboratory and field work. It consists of a springcontrolled
hammer mass that slides on a plunger within a tubular housing.
The hammer is forced against the surface of the concrete by ....etc

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To get full information or details of miniproject abstract for ndt ultrasonic please have a look on the pages

http://seminarsprojects.net/Thread-ultrasonic-detection-of-corrosionon-aircraft

http://seminarsprojects.net/Thread-ultrasonic-nde-and-characterization-of-aerospace-materials

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ABSTRACT

Ultrasonic metal welding is a solid state welding process, and here ultrasonic vibrating motion is used to join two materials. The two work pieces are held in between the anvil and sonotrode. The work piece on the anvil is hold stationary while the other part is moved to and fro due to the vibrating effect of the sonotrode. This movement the oxide disperses layer in between them and atoms of the work pieces are diffused from one part to another. When vibration is stopped a pure metallurgical bond is obtained.
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Non-Destructive Testing


INTRODUCTION

Nondestructive testing or Non-destructive testing (NDT) is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage. The terms Nondestructive examination (NDE), Nondestructive inspection (NDI), and Nondestructive evaluation (NDE) are also commonly used to describe this technology. Because NDT does not permanently alter the article being inspected, it is a highl ....etc

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ppt presentation of liquid penetrant testing of ndt defects and discontinuities ....etc

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How to apply NDT course? - How to apply NDT / Application / Guide

This will need a few qualifications.

L have passed the Mathematics section.
Gazette notification issued before the age. Less than 24.

If you have the qualifications NDT course you can apply.

NDT Application Download want to make is here to.

The application to fill a lot of things people should know before. The information in Sinhala here to go. English here go.

Learn more details NDT Web Site together here to go.

NDT Face Book Fan Page together here to go.
....etc

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