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25 Cards in this Set
- Front
- Back
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Diffusion |
Transfer of mass either within a specific solid or from a gas, liquid or another solid phase. |
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Interdiffusion or impurity diffusion |
When atoms of one metal diffuse into another |
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Self diffusion |
Diffusion of pure Metals but all atoms exchange positions |
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Vacancy diffusion |
The Interchange of an atom from a normal lattice position to an adjacent vacant lattice position of agency |
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Interstitial diffusion |
When Hoster substitutional impurity atoms rarely form interstitials and do not normally diffuse via this mechanism |
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Diffusion flux |
How fast diffusion occurs or the rate of mass transfer |
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Steady-state diffusion |
If diffusion flux does not change with time |
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Concentration profile |
When concentration C is plotted vs. Position within the solid the resulting curve is |
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Concentration gradient |
The slope at a particular point on the Curve |
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Driving force |
What compels a reaction to occur |
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Elastic deformation |
Deformation in which stress and strain are proportional |
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Anelasticity |
Time dependent elastic behavior |
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Poisson's ratio |
The ratio of the lateral and axial strains |
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Plastic deformation |
When a material is deformed beyond the point where stress is no longer perportional to strain, and is permanent |
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Proportional limit |
The point which separates erosive and plastic deformation parts on the curve |
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Yield strength |
The stress cosign to the intersection of the bend in the stress strain curve and the parallel line |
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Tensile strength |
Stress at the maximum on the stress strain curve |
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Ductility |
The measure of the degree of plastic deformation that had been sustained at fracture |
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Resilience |
The capacity of a material to absorb energy when it us deformed elastically and then, upon unload, have the energy recovered |
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Toughness |
A materials resistance to fracture when a creak is present |
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Dislocation density |
Number of dislocations |
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Skip system |
The combination of the slip plane and slip direction |
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Solid solution strengthening |
Alloying impurity atoms into either substitutional or interstitial solid solutions |
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Strain hardening |
When a ductile metal becomes harder and stronger as it is plastically deformed |
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Recrystallization |
The formation of a new set of strain free and equiaxed grains |
