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22 Cards in this Set
- Front
- Back
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Anisotropy
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different material properties in different directions
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Body Centered Cubic
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Crystal structure. Good strength and moderate ductility. High ductility at high temperatures.
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Cold Work
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Plastic deformation at room temperature. <0.3 Tm.
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Crystals
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Atoms arranged into various orderly configurations.
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Dislocations
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Linear or one-
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Elastic Deformation
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Recoverable deformation.
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Face Centered Cubic
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Moderate strength, good ductility.
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Grains
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Consists of a single crystal or polycrystalline aggregate.
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Grain Boundaries
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interfaces that separate individual grains.
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Grain size
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Large Grains: low strength, low hardness, high ductility. Excessively large grains are brittle.
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Hexagonal Close Packed
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Brittle at room temp. Low # slip systems.
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Homologous Temperature
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Ratio of working temperature to melting point. T/Tm.
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Hot Working
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Plastic deformation above re crystallization temperature.
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Plastic Deformation
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Permanent deformation.
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Preferred Orientation
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Crystallographic anisotropy. Sliding blocks rotate toward the direction of tensile force. Aligning slip planes.
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Recovery
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Below recrystallizaiton temp. Stresses are relieved in highly deformed regions. Subgrain boundaries form.
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Recrystallization
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New equiaxed strain free grains form. 0.3
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Slip Plane
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Atoms slipping over adjacent plane. Maximum atomic density.
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Slip System
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combination of slip plane and direction.
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Strain Hardening
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Higher stress required to overcome entanglements and impediments increases overall strength and hardness.
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Unit Cell
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Smallest group showing lattice structure.
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Work Hardening
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Same as strain hardening
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