Determination of depth and length, defects of some Aluminum and Steel samples discontinuities by using Liquid Penetrant testing and Ultrasound testing

Abstract

Non destructive test (NDT) used in many several ways for example the industrial, medical and military. And also used in pipelines, trackage and even in aviation checks .Generally (NDT) is the verification of the validity of the sample without making damage on it, and reused it again. In this research we made crack in two types of materials (aluminum, carbon steel) with a certain force. And used two types of NDT (liquid pentrant, and ultrasound test) to check the discontinuity, and the length of the cracks were found by liquid pentrant test for the surface cracks and found that 13mm for aluminum and 4mm for carbon steel. The depth of the cracks was checked by ultrasound test and found that 8mm for aluminum, and 2mm for the, carbon steel. From this it is clear that the examination using ultrasound gives better results than using liquid pentrant test..