Term
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Definition
| The process by which plastic deformation is produced by dislocation motion. |
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Term
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Definition
| The number of dislocations in a material is expressed as the total dislocation length per unit volume; the number of dislocations that intersect a unit area of a random section. |
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Term
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Definition
| Slight displacements of atoms relative to their normal lattice positions, normally imposed by crystalline defects such as dislocations, and interstitial and impurity atoms. |
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Term
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Definition
| Preferred planes in a dislocation; in that plane there are specific directions along with dislocation motion occurs. |
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Definition
| The slip plane that follows that the direction of movement. |
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Term
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Definition
| This combination of the slip plane and the slip direction. |
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Definition
| Even though an applied stress may be pure tensile (or compressive), shear components exists at all but parallel or perpendicular alignments to the stress direction. |
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Term
| Critical resolved shear stress |
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Definition
| It represents the minimum shear stress required to initiate slip and is a property of the material that determines when yielding occurs. |
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Term
| Solid-solution strengthening |
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Definition
| Another technique to strengthen and harden metals is alloying with impurity atoms that go into either substitutional or interstitial solid solution. |
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Term
| Strain hardening / work hardening |
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Definition
| The phenomenon whereby a ductile metal becomes harder and stronger as it is plastically deformed. |
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Term
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Definition
| The temperature at which deformation takes place is "cold" relative to the absolute melting temperature of the metal |
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Term
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Definition
| Some of the stored internal strain energy is relieved by virtue of dislocation motion (in the absence of an externally applied stress), as a result of enhanced atomic diffusion at the elevated temperature. |
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Term
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Definition
| The formation of a new set of strain-free and equiaxed grains that have low dislocation densities and are characteristics of the precold- worked condition. |
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Term
| Recrystallization temperature |
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Definition
| The temperature at which recrystallization just reaches completion in 1 hour. |
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Term
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Definition
| After recrystallization is complete, the strain-free grains will continue to grow if the metal specimen is left at the elevated temperature. |
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