MATERIAL ED8E 11
As the title of this unit suggests the subject of this is "BASIC ENGINEERING MATERIALS"
and it has to be
It is hoped that this learning episode will make you think "What is a component made from and
It will be impossible for anyone partaking in this learning object not to have any prior knowledge of
Depending on your age, prior education and experience your knowledge of materials will vary. We
will I assume
that you may recognise copper for instance? Perhaps! We certainly wouldn't assume that you
could tell the
difference between thermosetting plastic and thermoplastic.
What we will assume is that since you have started to read this learning object you are intending to
some discipline in engineering whether as vocational or simply as a hobby. Therefore it is of
that you have at least a general idea of the material you will be working with.
Do not expect that after successfully completing this learning object that you will be able to recognise
accurately every engineering material available. This would be impossible for anyone. Initially
manufacturer can tell you that. Other than that,
using Xray analysis or
attain accurate information.
What you will be able to assess is whether a component is made from steel, perhaps not a particular
how it was produced and so on. I hope you will be assured that if you do need to know what a particular
material is, or if you are uncertain, simply ask the manufacturer or supplier.
What we can assure you of is that if you are following any engineering discipline it will be required
for you to be
able to recognise common materials to at least the standard you will learn from this learning object
Select one of the above right buttons e.g. Next , Previous or Home to navigate through this learning
All materials contain atoms, atoms are the smallest particles of any substance that can be found. There
about 90 elements occurring naturally on earth and all materials are made from elements. Click
to see the
Why is a basic knowledge of engineering materials important . It would be very embarrassing if you
know the difference between plain carbon steel and an Austenitic Stainless Steel . It would be irresponsible
you were to make a component, which has to be welded from high carbon steel . Obviously there are a
amount of materials which can be used however this map will cover the more common materials you are
come in contact with in you workplace. these being:
Plain carbon steels
Engineers require a large range of materials to fulfill the requirements and performance of designs
materials may be subjected to extremes of conditions so that no one material is adequate . Everything
be seen, everything that can be touched or used is a material . All are made up of numerous atoms arranged
and bonded in a specific way to create the materials as they are known . These arrangement of atoms
are the fundamental basis of the properties of the materials, properties which can be modified, within
limitations, to enable the material to perform a wider range of duties.
Thus the objectives of this map are to:
Give you a basic understanding of the common physical and mechanical properties which make materials
differ from each other as they will be individually described
Help to identify one particular material from another
Understand why one material is selected over another due to the first having better functional properties
Decide why a material may be preferred over another to produce components despite the fact that the
may have better service properties.