the properties in the vertical direction are different from those in the horizontal direction
Body Centered Cubic (BCC)
Refers to plastic deformation that is usually carried out at room temperature. When deformation occurs below the recrystallization temperature.
Linear, one-dimentional defects
Material returns to its original shape when the force is removed
The material does not return to its original shape when the force is removed. Permanent deformation.
Face Centered Cubic
Surfaces that separate individual grains
Large grain size is associated with low strength, low hardness, and low ductility.
Hexagonal Close Packed
The ratio T/T
where T is the working temperature and T
is the melting point
Plastic deformation that occurs above the recrystallization temperature
Occurs at a certain temperature range below the recrystallization temperature of the metal, where the stresses in the highly deformed regions of the metal piece are being relieved.
New strain-free grains nucleate and grow to replace those deformed by internal stresses
Decreased strength and hardness
The combination of a slip plane and its direction of slip
Increased shear stress required to overcome entanglements and impediments that results in an increase in the overall strength and hardness of the metal
Key terms for ME 282 Midterm 1