IET 130 Exam 1 || All Correct.
2 factors attributed to product failure: correct answers -insufficient design
-insufficient properties
metals correct answers solids composed of atoms held together by a matrix of electrons
characteristics of metals correct answers -electrons are free to move
-good conductors of heat and electricity
-malleable
Ferrous correct answers have at least 50% iron
examples of ferrous metals correct answers -steel
-cast iron
-iron
-stainless steel
nonferrous correct answers contains less than 50%
Examples of nonferrous metals correct answers -aluminum
-tin
-gold
-silver
Advantages of aluminum correct answers 1/3 weight of steel
-will not rust
-high reflectivity
-nonmagnetic
-nontoxic
Aluminum types correct answers Cast - pouring into a mold to obtain shape
wrought-made into a sheet by rolling, drawing it, and extruding it
wrought alloy designation correct answers 1000 commercially pure aluminum (99% +
aluminum)
2000 Copper
3000 Manganese
4000 silicon
sooo magnesium
6000 Magnesium + silicon
7000 zinc
8000 other elements
Temperature designations correct answers xxxx-F As fabricated
xxxx-W Solution heat treated
, xxxx-0 Annealed
xxxx- H Strain hardened
xxxx- T Thermally treated
age hardened correct answers exposing an aluminum alloy to a specific
temp-time cycle
anodizing correct answers process of producing a electro-chemical conversion
coating on aluminum
hard coating correct answers electrochemical process for a thicker anodize coating
naturally aged correct answers aluminum alloys strengthened by exposure to room temp
solution treated correct answers aluminum heated to a sufficiently high temp to dissolve alloy
elements
strain hardened correct answers deforming aluminum to increase tensile strength
thermal aging correct answers a low-temp heat treatment for aluminum to produce precipitation
of dissolved alloy-subsequent strengthening
steel correct answers an alloy of iron & carbon, with the carbon being restricted within certain
concentration limits
-carbon limits between 0.06% +2.0%
continuous casting correct answers 90% of all steel production (Comcast)
ingot correct answers block of steel in a long rectangular shape
Finished steel types correct answers -hot finished
-cold finished
Hot finished steel correct answers - red-hot condition
- Above recrystallization temps
-between 400c to 700c (752°F to 1292 F)
Cold finished steel correct answers - below recrystallization temps
-below 400C (752 F)
Hot finished steel correct answers -when bloom or billet of steel is hot finished into a shape with
a smaller cross-sectional area, the grains dynamically recrystalize + the material does not get
harder
- it stays easy to roll or shape (high ductility)
-soft, and low strength
-surface finish is dull gray to black and scaled
2 factors attributed to product failure: correct answers -insufficient design
-insufficient properties
metals correct answers solids composed of atoms held together by a matrix of electrons
characteristics of metals correct answers -electrons are free to move
-good conductors of heat and electricity
-malleable
Ferrous correct answers have at least 50% iron
examples of ferrous metals correct answers -steel
-cast iron
-iron
-stainless steel
nonferrous correct answers contains less than 50%
Examples of nonferrous metals correct answers -aluminum
-tin
-gold
-silver
Advantages of aluminum correct answers 1/3 weight of steel
-will not rust
-high reflectivity
-nonmagnetic
-nontoxic
Aluminum types correct answers Cast - pouring into a mold to obtain shape
wrought-made into a sheet by rolling, drawing it, and extruding it
wrought alloy designation correct answers 1000 commercially pure aluminum (99% +
aluminum)
2000 Copper
3000 Manganese
4000 silicon
sooo magnesium
6000 Magnesium + silicon
7000 zinc
8000 other elements
Temperature designations correct answers xxxx-F As fabricated
xxxx-W Solution heat treated
, xxxx-0 Annealed
xxxx- H Strain hardened
xxxx- T Thermally treated
age hardened correct answers exposing an aluminum alloy to a specific
temp-time cycle
anodizing correct answers process of producing a electro-chemical conversion
coating on aluminum
hard coating correct answers electrochemical process for a thicker anodize coating
naturally aged correct answers aluminum alloys strengthened by exposure to room temp
solution treated correct answers aluminum heated to a sufficiently high temp to dissolve alloy
elements
strain hardened correct answers deforming aluminum to increase tensile strength
thermal aging correct answers a low-temp heat treatment for aluminum to produce precipitation
of dissolved alloy-subsequent strengthening
steel correct answers an alloy of iron & carbon, with the carbon being restricted within certain
concentration limits
-carbon limits between 0.06% +2.0%
continuous casting correct answers 90% of all steel production (Comcast)
ingot correct answers block of steel in a long rectangular shape
Finished steel types correct answers -hot finished
-cold finished
Hot finished steel correct answers - red-hot condition
- Above recrystallization temps
-between 400c to 700c (752°F to 1292 F)
Cold finished steel correct answers - below recrystallization temps
-below 400C (752 F)
Hot finished steel correct answers -when bloom or billet of steel is hot finished into a shape with
a smaller cross-sectional area, the grains dynamically recrystalize + the material does not get
harder
- it stays easy to roll or shape (high ductility)
-soft, and low strength
-surface finish is dull gray to black and scaled
