Testing methods Flashcards
What are the two main categories of material testing methods?
Destructive and non-destructive testing methods
What is a characteristic of destructive tests?
They damage or destroy the test piece during testing
Name four examples of destructive tests.
- Tensile tests
- Impact tests
- Fatigue tests
- Hardness tests
What does visual testing (VT) inspect for?
Flaws visible to the naked eye
What tools are commonly used in visual testing?
- Steel rules
- Gauges
- Cameras
- Magnifying lenses
What is tensile testing?
A destructive test that applies controlled tension to a sample until failure
What is the purpose of tensile testing?
To determine the strength and stretchability of a material
What is yield strength?
The point at which plastic deformation occurs under stress
How is yield strength determined?
Using devices known as extensometers
What is ultimate tensile strength (UTS)?
The maximum stress a specimen can withstand during testing
What does ductility refer to in tensile testing?
The elongation of a material during the test
What is strain hardening?
How much a material hardens with plastic deformation beyond the yield point
What does the modulus of elasticity measure?
The stiffness of a specimen
What is the Charpy impact test used for?
To measure the amount of energy absorbed by a specimen during fracture
What are the dimensions of a standard Charpy V-notch specimen?
55mm long, 10mm square, 2mm deep notch
What is the Brinell test?
A hardness test using a hardened steel ball indenter
What is the main difference between the Brinell and Vickers hardness tests?
The Vickers test uses a square-based pyramidal diamond indenter
How does the Rockwell test measure hardness?
Based on the depth of indentation left by a major load
What does the Wohler test determine?
The fatigue resistance or fatigue life of metals
What is corrosion testing?
Processes to solve, prevent or mitigate corrosion problems
What is immersion testing in corrosion testing?
A method to assess materials under specific conditions
Describe the hot wall test.
Evaluates corrosion in metal vessels hotter than bulk solutions
What is the Taber abrasion test used for?
To determine a material’s resistance to wear
What does electrical conductivity indicate?
How well a material conducts electricity
