Introduction to Materials
This section will provide a basic introduction to materials and material fabrication processing. It is important that NDT personnel have some background in material science for a couple of reasons. First, nondestructive testing almost always involves the interaction of energy of some type (mechanics, sound, electricity, magnetism or radiation) with a material. To understand how energy interacts with a material, it is necessary to know a little about the material. Secondly, NDT often involves detecting manufacturing defects and service induced damage and, therefore, it is necessary to understand how defects and damage occur.
will begin with an introduction to the four common types of engineering
materials. The structure of materials at the atomic level will
then be considered, along with some atomic level features that
give materials their characteristic properties. Some of the properties
that are important for the structural performance of a material
and methods for modifying these properties will also be covered.
In the second half of this text, methods used to shape and form
materials into useful shapes will be discussed. Some of the defects
that can occur during the manufacturing process, as well as service
induced damage will be highlighted. This section will conclude
with a summary of the
role that NDT plays in ensuring the structural integrity of a