MATL 240 Final Exam Study ACTUAL UPDATED QUESTIONS AND CORRECT
ANSWERS
Stages to solidification - Nucleation
- Growth
- Formation of Grain boundaries
What are the 3 most common crystal structures in metals - Hexagonal Close Packed
- Face Centered Cubic
- Body Centered Cubic
, The crystal structures will effect the properties of the True
metal
A metal grain is best described as Area where the atoms have the same orientation
Work hardening a metal requires what? Plastically deforming the alloy below its recrystallization temperature
Effects of work hardening cause - Decreased ductility
- Increased hardness
- Increased strength
Annealing or normalizing a metal alloy requires it to be 100 deg. F above the recrystallization temperature
heated to
Annealing requires the alloy t be cooled Very slowly- about 100 deg F per hour
Annealing a metal alloy produces what effects - Lowest strength
- Lowest hardness
- Highest ductility
What's the main advantage of normalizing compared to Lower cost
annealing
Strength is best described as Resistance to plastic strain
The maximum stress a metal alloy can be subjected to Elastic
without plastic deformation is
The material property that's most commonly used as a 0.2% Yield Strength
measure of the strength of a metal is
The fatigue strength is The stress where the alloy fractures after a specific # of stress cycles
ANSWERS
Stages to solidification - Nucleation
- Growth
- Formation of Grain boundaries
What are the 3 most common crystal structures in metals - Hexagonal Close Packed
- Face Centered Cubic
- Body Centered Cubic
, The crystal structures will effect the properties of the True
metal
A metal grain is best described as Area where the atoms have the same orientation
Work hardening a metal requires what? Plastically deforming the alloy below its recrystallization temperature
Effects of work hardening cause - Decreased ductility
- Increased hardness
- Increased strength
Annealing or normalizing a metal alloy requires it to be 100 deg. F above the recrystallization temperature
heated to
Annealing requires the alloy t be cooled Very slowly- about 100 deg F per hour
Annealing a metal alloy produces what effects - Lowest strength
- Lowest hardness
- Highest ductility
What's the main advantage of normalizing compared to Lower cost
annealing
Strength is best described as Resistance to plastic strain
The maximum stress a metal alloy can be subjected to Elastic
without plastic deformation is
The material property that's most commonly used as a 0.2% Yield Strength
measure of the strength of a metal is
The fatigue strength is The stress where the alloy fractures after a specific # of stress cycles
