ME 250 Exam 1
Card Set Information
ME 250 Exam 1
Study cards for Material Science
Involves loss of metal atoms at an anode
Where consumption of the resulting electrons occurs
Zinc coating protects against corrosion
protects against corrosion
have low ductility and toughness
load per unit area
Ultimate Tensile Stress
the maximum in the stress-strain curve thus it is the load-vearing capacity of a specimen in tension.
A region in the specimen begins to thin down more than any other region
Stress and Strain
size-dependent measures of load and displacement, respectively
this reversible behavior often shows a linear relation between stress and strain.
the permanent deformation behavior occurs when the tensile (or compressive) uniaxial stress reaches sigma_y
the arrangement of phases and grains
Crystallographic points, directions, and planes
specified in terms of indexing schemes
Mechanism of plastic deformation. Motion of planes of atoms in specific planes and directions
Linear defects in a material; 3 kinds: edge, screw, mixed. Slip occus by the motion of (this).
Governed by the ease/difficulty of motion of dislocations. Dislocations interact with different objects (other dislocations, solute atoms, grain boundaries, etc) and affect the overall plasticity.
Multiplication of dislocations for increased interactions and impediment to dislocation motion. Leads to increased yield strength, increased tensile strength, decreased ductility.
increases as a material is plastically deformed
the value at which a material starts to deform plastically.
voids due to increased stress in all directions
A measure of the ability of a material to be defomed plastically without breaking. Inversely related to strength.
Ranks the reactivity of metals/alloys in seawater
the rapid formation of a thin oxide layer by the chemical combination of oxygen atoms with surface atoms of the metal
The basic unit of a crystal structure. Structures in three dimensions.
In a unit cell, the number of closest neighbors to the central atom.