Design Year 8 EOY

tensile strength

the ability to be stretched without breaking

Malleability

the ability to be pressed, spread and hammered into shape

Hardness

resistance to cutting, scratching and wear

Elasticity

the ability to regain the original shape after it has been deformed

Ductility

very strong when stretched

Work hardness

when the structure of metals change as a result of repeated hammering

compressive strength

very strong under pressure

toughness

resistance to breaking, bending or deforming

Brittleness

will break easily without bending

ferrous metals

a metal that has iron in its composition (usually ends up being magnetic)

non ferrous metals

a metal that does not contain iron

alloy

a mixture of two or more elements, at least one of which is a metal

pure metal

a metal that does not contain any other materials

Ergonomics

Ergonomics is about designing for people, wherever they interact with products, systems or processes. We usually don't notice good design (unless perhaps, it's exceptional) because it gives us no cause to, but we do notice poor design.

Anthropometrics

Anthropometrics is the comparative study of human body measurements and properties. You use this data in order to design something that is comfortable for its intended user. Therefore it is ergonomically well designed.

examples of alloy, ferrous metals

cast iron, stainless steel, mild steel, tool steel

examples of alloy, non ferrous metals

duralumin, brass, pewter

examples of pure, non ferrous metals

tin, zinc, copper, aluminium

scriber

metal file

coping saw

Tinsnips

needle files

hacksaw

round nosed pliers

parallel pliers

hide mallet

blow torch

centre punch

dividers

brass tweezers

properties of all metals

1. high melting points

2. good conductors of heat

3. good conductors of electricity

4. high density

5. malleable

a way to join metals

silver soldering

method for silver soldering

1. file the ends of the metal so that they are smooth

2. put the ends together so that the join is level and straight

3. clean thoroughly so that there is no grease

4. apply flux

5. put silver pallion on the join

6. slowly heat both sides so that the silver melts and joins the sides

7. quench in water

8. pickles for no less than 3 minutes

9. rinse in water

thermoplastics

Materials that can be repeatedly softened by heating and hardened by cooling. Due to no strong bonds present.

thermosets

They become permanently hardened when heat is applied and do not soften upon subsequent heating. This is due to the strong bonds made after the first time they are heated.

isometric projection

A way of showing a 3D object which involves drawing how you see it from a certain angle where you can see most sides at the same time.

orthographic projection

A way of showing a 3D object through a series of 2D shapes which represent the different angles which you could look the object at (top, front etc.)