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Engineering Material
Test 3 Definitions
| Term | Definition |
|---|---|
| Bronze | This alloy of copper and tin is strong enough to make into machine parts and weapons |
| Aluminum | This metal is lightweight and abundant in the earth's crust and is often found in the aerospace and food packaging industries |
| Titanium | This high performance metal is highly reactive with oxygen in a molten state, making it difficult and expensive to process |
| Spherodite | Soft, ductile microstructure of steel formed by heating just below the eutectoid temperature for 15 to 24 hours |
| Gray Iron | This type of cast iron has excellent vibrational damping characteristics |
| Forging | This type of forming operation involves large plastic deformation at elevated temperatures, think blacksmithing |
| Pearlite | Eutectoid Structure in the iron-carbon system |
| Nickel | This metal is relatively expensive and is found large quantities in asteroids (Hint: it is not used to make the coin that shares its names |
| Investment Casting | This type of casting uses a wax core with a plaster mold |
| Medium Carbon Steel | This steel contains between 0.25 and 0.60 wt% carbon |
| Heat Affected Zone | Region adjacent to a weld that may have experienced microstructural and property alterations |
| Martensite | Iron-carbon phase formed by rapid cooling to room temperature, very strong and brittle |
| Jiminy End Quench | Test used to measure hardenability in steels by cooling one end with a jet of water |
| Die Casting | This process injects molten metal into a mold at high pressure and temperature |
| Noble Metals (Ag, Au, Pt) | These metals are nonreactive and very malleable. Also prized for their lustrous appearance. |
| Refractory Metals | These metals are useful alloying elements because of their high melting temperature |
| Austenite | Non-magnetic phase of steel that does not exist in equilibrium at room temperature except in stainless steels |
| White Iron | This type of cast iron has very limited uses because of its extremely brittle nature. It does not find use as rollers in a rolling mill. |
| Hardenability | The ability of a steel to form martensite |
| Extrusion | Forming Operation that pushes through a die to form a shape |
| Bainite | This phase of iron-carbon is fairly strong and is formed by transforming austenite below 550 degrees Celsius |
| Stainless Steels | Steel used for its excellent corrosion resistance, especially at high temperatures |
| Precipitation Hardening | Hardening process used in nonferrous metals where small particles of a second phase are formed |
| Tungsten | Highest melting temperature metal |
| Quenching | This process forms martensite by plunging an orange hot steel specimen into room temperature coolant |
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