3 Properties of Materials Flashcards
Can exist in several different crystalline structures
Allotropic
An example of an allotropic material
Iron
Material that exist in a crystalline pattern
Aluminum
Internal forces acting upon an imaginary plane cutting the body being loaded, or called
Stresses
Tension and compression forces are
Considered to act normally or perpendicular to a plane
The effect of forces that act along or are parallel to a plane
Shear stress
The only test that supplies absolute information about a workpiece or material is a test of the particular property of interest conducted on the part itself
Direct testing
The use of such a correlation such that accurate knowledge of a relationship between two factors must exist
Indirect testing
In the stress range below the elastic limit the ratio of unit stress to unit deformation or the slope of the curve is referred to as the modulus of elasticity or
Young’s modulus
Up to the elastic limit, the energy is recoverable and is called
Resilience
The ability of a material to absorb energy without fracture
Toughness
Holes through the material, notches in the surface, internal flaws, such as voids, cracks, or inclusions or even minor scratches and faults caused by corrosive attack on the grain boundaries maybe sources of
Fatigue failure
Tensile stresses are likely to be the highest at
Near the surface
Continuous deformation of material under constant load, producing units stresses below those of the elastic limit
Creep
Stress required to produce failure at prescribe values of time and temperature
Stress rupture strength
