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Engineering Material

Test 2 Definitions

TermDefinition
Fatigue Limit Limiting stress value below which fatigue will not occur.
Yield Strength Strength where noticeable plastic deformation occurs; defined by a 0.2% offset line.
Plastic Deformation Deformation in which stress and strain are no longer proportional; irreversible process.
True Stress Instantaneous Load divided by instantaneous cross-sectional area.
Fatigue Strength The stress level at which failure will occur for some specified number of cycles.
Precipitation-Hardening Strengthening method that relies on forming hard secondary particles.
Fracture Mechanics The study of material behavior in the presence of a crack.
Toughness Capacity of a material to absorb energy and plastically deform before fracturing
Strain Hardening Phenomenon by which a ductile metal becomes harder and stronger as it is plastically deformed
Ultimate Strength The maximum value on the engineering stress-strain curve
Engineering Stress Instantaneous load divided by original cross-sectional area
Slip System The combination of the slip plane and the slip direction
Elastic Deformation Deformation in which stress and strain are proportional; reversible process
Solid-Solution-Strengthening Adding impurity atoms to distort the lattice and generate lattice strains which strengthens the material
Hardness Measure of a material's resistance to localized plastic deformation; indention, or scratching
Resilience Capacity of a material to store energy when it is deformed elastically and the, upon loading, to have this energy recovered
Ductility Measure of the degree of plastic deformation that has been sustained at fracture
Charpy/Izod Test Standard Tests that are used to measure impact energy
Recrystallization The formation of a new set of strain-free and equiaxed grains hat have low dislocations densities
Bond Energy The energy required to separate two atoms to an infinite distance
Created by: jjardor
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