1.1 testing materials

Question 1

Tensile testing

Answer 1

tensile strength= the ability to resist stretching and pulling forces

can be tested by:
clamping material samples of the same length and thickness into a vice and apply weights to the unclamped end
(the less deflection under load, is the more tensile strength the material has)

Question 2

Toughness testing

Answer 2

toughness test= how much impact force the material can absorb
testing:
materials are clamped into a vice
each sample is hit with the same force using a hammer
(tough materials will absorb the impact but brittle materials will bend)

Question 3

hardness testing- abrasive wear and resistance to surface indentation

Answer 3

abrasive wear= easily tested by running a file over the material surface (material with the fewest scratches is the hardest)
resistance to surface indentation= can be tested by a dot punch and a hammer (the smaller indent is the harder material

Question 4

malleability and ductility testing

Answer 4

this test can be used to test both ductility and malleability using one test piece
testing:
secure test piece
try bend the piece till it breaks or cracks
(cracks or surface damage on the inside of the bend indicates a lack of malleability)

Question 5

corrosion testing

Answer 5

= can be used to determine the rate of corrosion like sun or rain

testing :
all materials same size, place outside in areas exposed to weather, leave for an amount of time then check

(materials can then be visually inspected for surface corrosion)