Ideally the easiest avenue to test the structural functionality of a substance is by stretching to a point of breaking. It is a sure way to provide an effective and economically reliable solution for systems that are of low cost.This implies that the technique is not fit for use in in systems of high value.
Another associated disadvantage with destructive testing is that you will not be able to continue learning the subject of study since you will be breaking every material of testing, leaving more to be probed.Fortunately a non-destructive method of testing has come in to offer a more cost effective, and thus more reliable remedy. It is a way of testing materials before use.
Non-destructive testing gives confidence that the material being used are defects free and risks of problems in future are avoided. Most manufacturing industries make use of this technique top process their products. Various technologies are used in the application of non-destructive testing owing to the fact that it has proven to be more advantageous.
The technique is extensively applied in the technology of visual and optical. Non-destructive testing has proven helpful in testing optical and visual materials in the manufacture of visual aids and tools. Effects of light and resistance to tension are some of the qualities that are tested in visual and optical aids that are used by man using the technique.Addition, machines such as bioscopes and computer aided cameras are used to examine the qualities and defects in the materials used to manufacture optical and visual items. Know more about radiology at http://www.ehow.com/about_4814987_forensic-radiology.html.
Radiography also employs the technology of non-destructive testing. X-rays are used in radiography to examine the qualities and defects of the subject material. The use of x-rays is synonymous with the way a doctor uses the rays to examine fractures and any other defects in a human body.The process involves first passing radiations through the part of the material to be tested by a professional called a radiographer using a digital device which will pick information on the conditions of the components of the material to for a film which is used for interpretation.
Next is ultrasonic testing.The application part of non-destructive testing involves passage of waves with high frequencies through the material subject of the test in order to detect any Defense and discontinuities and changes in features. The sound waves are introduced to the material and any internal imperfections are reflected in a receiver.
The other technology is magnetic particle testing.The process starts by starting a field of magnetism on the material to be tested and then followed by sprinkling of iron powder on the surface.After applying the iron particles, you will see them getting collected at a point which will be interpreted as a leakage if indeed there is one.
The last one is penetrate testing which involves application of a dye solution on the material. The dye will go through any cavity of the surface.
You can now test the usefulness and detect any defects on substance before use by the technique of Digital Radiography.