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Properties of Metal
Materials and Processes
| Question | Answer |
|---|---|
| Ability of a material to resist deformation & stress without breaking | Strength |
| Tension - pulled | Tensile strength |
| Resist deformation | Yield strength |
| Opposing forces | Shear strength |
| Crushing / compressing | Bearing strength |
| Ability of a metal to resist cutting, penetration, or abrasion | Hardness |
| Ability to be bent, formed or shaped without cracking | Malleability |
| Ability to be drawn out into wire stock, extrusions, or rods | Ductility |
| Materials tendency to break or shatter when exposed to stress (opposite of malleability & ductility) | Brittleness |
| Property which enables a metal a carry heat or electricity | Conductivity |
| Abiltiy to conduct heat | Thermal conductivity |
| Ability to conduct electric current (allow electron to flow) | Electrical conductivity |
| Property of a metal to expand when heated and shrink when cooled | Thermal expansion |
| Tendency to return to its original shape after stretching or bending | Elasticity |
| The point beyond which the metal does not return to its original shape after a deforming force is removed | Elastic Limit |
| Ability to resist tearing or breaking when it is bent or stretched | Toughness |
| Ability to be joined by heating | Fusibility |
| Mass per unit volume compared to water (for solids) | Density |
| Are formed by physically working the metal into shape | Wrought objects |
| Are formed by pouring molten metal into molds | Cast objects |
| Name two types of metal working processes. | Wrought and cast |
| Name three ways to physically working metals. | Hot working, cold working, and extrusion |
| Forming metals at an elevated temperature | Hot working |
| Pressing | Used to form large metal objects |
| Drop Forging | Hammering while the metal is hot |
| Hammering | Small parts, smith forging |
| Cold working is also known as | Work Hardening or Strain Hardening |
| Performed well below the metals critical temperature, part must normally be heat treated after forming | Cold working |
| Name three ways of cold working metal. | Cold rolling, cold drawing, and/or pressing |
| Hot or cold, the metal is forced through a die which produces the desired shape, mostly on aluminum | Extrusion |
| Contains no iron | Non-ferrous metal |
Created by:
bruteybrat@aol.com
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