material testing Flashcards
(11 cards)
why do you test materials?
to help select the most appropriate material for a product or application.
What ensures fairness in material testing?
Use equal-sized samples, consistent environmental conditions, identical equipment and techniques, and one person to record all results
What are the five main types of workshop material tests?
Tensile, toughness, hardness, malleability, and ductility tests.
What does less deflection under load indicate in a tensile test?
The material has higher tensile strength.
What is measured in a toughness test?
A material’s ability to absorb impact. Tough materials absorb force, while brittle ones bend or shatter.
Describe the toughness test procedure.
Clamp the sample in a vice at a set depth and strike it with a hammer using controlled force. Observe how the material reacts.
What does the hardness test measure?
The material’s resistance to indentation. A smaller indent means a harder material.
How is a hardness test carried out in a workshop?
Clamp the material, strike a dot punch with a hammer, then measure the indent for comparison.
How do you test malleability and ductility?
Bend the sample to 90° and inspect for cracks.
Cracks outside = poor ductility
Cracks inside = poor malleability
How is corrosion testing conducted in a workshop?
Leave equal-sized samples outside in the same weather conditions for a set time, then inspect for surface corrosion.
What is the main difference between workshop and industrial tests?
Workshop tests are more comparative and less precise, while industrial tests are standardised and reliable.
