MATL 240 Final Exam Review ACTUAL UPDATED QUESTIONS AND CORRECT
ANSWERS
What are the stages to solidification of a metal? - Growth
- Growth - Nucleation
- Freezing - Formation of grain boundaries
- Formation of Grain boundaries
- Anisotropic
- None of these
- Nucleation
What are the 3 most common crystal structures in - Body Centered Cubic
metals? - Face Centered Cubic
- Body Cubic - Hexagonal Close Packed
- Hexagonal Close Packed
- Body Centered Cubic
- Face Centered Cubic
- Amorphous
- Face Body Centered
- Allotropic
The crystal structure will effect the properties of the True
metal. (True/false)
, A metal grain is best described as what? area where the atoms have the same orientation
- area where the metal solidified first
- area where the atoms have the same orientation
- none of these
- area where the atoms have a random orientation
Work hardening (cold working) metal requires what two - Metal must plastically deform
factors? - Metal must be below the recrystallization temperature
Which of the following effects does work hardening - increased strength
cause? (select all that are correct) - increased hardness
- decreased modulus of elasticity - decreased ductility
- increased strength
- decreased ductility
- increased hardness
- increased ductility
- increased modulus of elasticity
Annealing or Normalizing a metal alloy requires it to be 100°F above the recrystallization temperature
heated to:
- Above the nil-ductility temperature
- 100°F above the recrystallization temperature
- None of these
- Above the melting temperature
Annealing requires the alloy to be cooled Very slowly - approximately 100°F/hour
- Air cooled
- Very slowly - approximately 100°F/hour
- Cooling rate is not important
- Rapidly in water
ANNEALING a metal alloy produces the following effects - lowest strength
(select all that apply) - lowest hardness
- lowest modulus of elasticity - highest ductility
- lowest strength
- lowest hardness
- high ductility (but not the highest)
- highest modulus of elasticity
- highest ductility
- lowest ductility
- low strength (but not the lowest)
What is the main advantage of Normalizing compared to Lower cost
Annealing?
- Higher modulus
- Highest ductility
- Cleaner
- Lower cost
ANSWERS
What are the stages to solidification of a metal? - Growth
- Growth - Nucleation
- Freezing - Formation of grain boundaries
- Formation of Grain boundaries
- Anisotropic
- None of these
- Nucleation
What are the 3 most common crystal structures in - Body Centered Cubic
metals? - Face Centered Cubic
- Body Cubic - Hexagonal Close Packed
- Hexagonal Close Packed
- Body Centered Cubic
- Face Centered Cubic
- Amorphous
- Face Body Centered
- Allotropic
The crystal structure will effect the properties of the True
metal. (True/false)
, A metal grain is best described as what? area where the atoms have the same orientation
- area where the metal solidified first
- area where the atoms have the same orientation
- none of these
- area where the atoms have a random orientation
Work hardening (cold working) metal requires what two - Metal must plastically deform
factors? - Metal must be below the recrystallization temperature
Which of the following effects does work hardening - increased strength
cause? (select all that are correct) - increased hardness
- decreased modulus of elasticity - decreased ductility
- increased strength
- decreased ductility
- increased hardness
- increased ductility
- increased modulus of elasticity
Annealing or Normalizing a metal alloy requires it to be 100°F above the recrystallization temperature
heated to:
- Above the nil-ductility temperature
- 100°F above the recrystallization temperature
- None of these
- Above the melting temperature
Annealing requires the alloy to be cooled Very slowly - approximately 100°F/hour
- Air cooled
- Very slowly - approximately 100°F/hour
- Cooling rate is not important
- Rapidly in water
ANNEALING a metal alloy produces the following effects - lowest strength
(select all that apply) - lowest hardness
- lowest modulus of elasticity - highest ductility
- lowest strength
- lowest hardness
- high ductility (but not the highest)
- highest modulus of elasticity
- highest ductility
- lowest ductility
- low strength (but not the lowest)
What is the main advantage of Normalizing compared to Lower cost
Annealing?
- Higher modulus
- Highest ductility
- Cleaner
- Lower cost
