Mechanical Properties Flashcards
What are the mechanical properties?
Strength
Stiffness
Hardness
Ductility
What is the Gauge length?
An arbitrary portion of the reduced parallel section of a tensile specimen over which an extension is measured
What is the Tensile Strength?
The maximum nominal stress in a tensile tesr
Which two tests would you use to inspect a material on site to prevent possible damages?
- Hardness test
- Metallographic test
a. Electrolytic Preparation
b. Mechanical Preparation
c. Transcopy Replica Foil
What is hardness?
The resistance of a material to deformation by indentation
What is toughness?
Energy to break a unit volume of a material (approximated by the area under the stress-strain curve)
What is the equation for Poisson’s ratio?
v = Lateral Strain/Longitudinal Strain
Where is Tensile Stress represented on an engineering stress-strain curve?
The maximum stress value
What is the difference between engineering stress and true stress?
True stress takes into account the reduction in area owing to deformation whereas engineering stress uses the original cross-sectional area
What are the three typed of indentation tests?
- Vickers (pyramid)
- Rockwell (cone or ball)
- Brinell (ball)
