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10 Cards in this Set
- Front
- Back
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Describe Stress/Strain Curve
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Load 1st applied, specimen elongates in proportion to load --> linear elastic
-After load inc. and plastic deform. reached --> strain and stress no longer proportional as in elastic region |
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What is manufacturing?
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the process of converting raw materials into products
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What are discrete products?
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individual parts (e.g. nails,gears, beverage cans)
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What are continuous products?
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Cut into individual parts (e.g. wire, sheet metal, plastic pipe)
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Name some resources and activities of manufacturing
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product design, machinery, process planning, materials, purchasing, production control, marketing, shipping, sales
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What influences (behavior) properties of metals
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composition, impurities, vacancies in atomic structure, grain size, grain boundaries, environment size and surface
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What is allotropism?
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polymorphism; appearance of more than one type of crystal structure
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What are two mechanisms by which plastic deformation takes place?
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1) slipping of one plane of atoms over an adjacent plane (slip plane)
2) twinning - a portion of crystal forms a mirror image of itself across plane of twinning |
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What is work hardening (strain hardening)?
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Effect of an increase in shear stress, thus causing an increase in overall strength and hardness of material
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What are dislocations and name the two?
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-Defects in the orderly arrangement of metals atomic structure
1) Edge - hump of carpet 2) Screw - atomic planes or a spiral plane |
