Methods For Investigating And Testing Materials Flashcards
What are the six properties of materials that we can test?
Tensile, toughness, hardness, malleability, corrosion, and conductivity.
What is a simple workshop test?
A test that uses basic tools and equipment.
What are industrial tests?
Tests that are usually carried out in a lab with specific testing machinery, using standardised test pieces of materials.
What does a tensometer machine test for?
Tensile strength.
What can we determine from the result of a tensile strength test?
Less deflection under load means the material has more tensile strength.
What can we determine from a toughness test?
Tough materials absorb impact, whereas brittle materials bend or shatter
How can we carry out a workshop hardness test?
The material is tested, using a dot punch and force from a hammer. The smaller the indent, the harder the material.
What is a malleability and ductility test, and what can we determine from the results?
The test piece is bent to an angle of 90°
Cracks on the outside, indicate a lack of ductility. Cracks on the inside indicate a lack of malleability.
How can we carry out corrosion testing in the workshop?
Play equally sized material samples outside in an area exposed to the effects of weather and leave for a set time. Materials can then be visually inspected for surface corrosion.
How can we carry out an electrical conductivity test in a workshop?
Collect material samples of the same dimensions and mark a set distance to place the multimeter probes. Measure the resistance on the multimeter. The higher the resistance, the lower the conductivity.
