Materials Engineering Midterm
Materials
Exam Engineering
2 study guide
Midterm
materials
Materials
Exam science
Engineering
2 study
and
guide
engineering
Midterm
materials
Examexam
science
2 study
review.pdf
and
guide
engineering
materialsexam
science
review.pdf
and engineering exam review.pdf
Materials
Engineering
Midterm Exam 2
study guide
materials science
and engineering
exam review
Materials Engineering Midterm
Materials
Exam Engineering
2 study guide
Midterm
materials
Materials
Exam science
Engineering
2 study
and
guide
engineering
Midterm
materials
Examexam
science
2 study
review.pdf
and
guide
engineering
materialsexam
science
review.pdf
and engineering exam review.pdf
, Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf
Describe edge, screw dislocations. Note the dislocation line and Edge dislocation:
direction along which the dislocation line extends in these two -extra half-plane of atoms inserted in a crystal structure
types of dislocations -b perpendicular to the dislocation line
Screw dislocation:
-spiral planar ramp resulting from shear deformation
-b parallel to the dislocation line
~[Burgers vector 'b': measure of lattice distortion]
Describe the atomic structure within the vicinity of a grain Interfacial (Planar) Defects: e.g. external surfaces, grain boundaries, phase boundaries, twin
boundary boundaries, stacking faults etc.
In the vicinity of a grain boundary (which is several atomic distances wide), there is some
atomic mismatch between two adjacent grains that have different crystallographic
orientations
Name and describe the two atomic mechanisms of diffusion. -Interstitial diffusion: solute atoms which are small enough to occupy interstitial sites diffuse
by jumping from one interstitial site to another.
-Substitutional(vacnacy) diffusion:An atom breaks its bonds and jumps into neighboring
vacant site.
Diffusion •A time-dependent process
•Material transport by atomic motion
•Expressed as Diffusion flux (J)
•J = mass (or number of atoms) diffusing through and perpendicular to a unit crosssectional
area of solid per unit of time.
Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf
Materials
Exam Engineering
2 study guide
Midterm
materials
Materials
Exam science
Engineering
2 study
and
guide
engineering
Midterm
materials
Examexam
science
2 study
review.pdf
and
guide
engineering
materialsexam
science
review.pdf
and engineering exam review.pdf
Materials
Engineering
Midterm Exam 2
study guide
materials science
and engineering
exam review
Materials Engineering Midterm
Materials
Exam Engineering
2 study guide
Midterm
materials
Materials
Exam science
Engineering
2 study
and
guide
engineering
Midterm
materials
Examexam
science
2 study
review.pdf
and
guide
engineering
materialsexam
science
review.pdf
and engineering exam review.pdf
, Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf
Describe edge, screw dislocations. Note the dislocation line and Edge dislocation:
direction along which the dislocation line extends in these two -extra half-plane of atoms inserted in a crystal structure
types of dislocations -b perpendicular to the dislocation line
Screw dislocation:
-spiral planar ramp resulting from shear deformation
-b parallel to the dislocation line
~[Burgers vector 'b': measure of lattice distortion]
Describe the atomic structure within the vicinity of a grain Interfacial (Planar) Defects: e.g. external surfaces, grain boundaries, phase boundaries, twin
boundary boundaries, stacking faults etc.
In the vicinity of a grain boundary (which is several atomic distances wide), there is some
atomic mismatch between two adjacent grains that have different crystallographic
orientations
Name and describe the two atomic mechanisms of diffusion. -Interstitial diffusion: solute atoms which are small enough to occupy interstitial sites diffuse
by jumping from one interstitial site to another.
-Substitutional(vacnacy) diffusion:An atom breaks its bonds and jumps into neighboring
vacant site.
Diffusion •A time-dependent process
•Material transport by atomic motion
•Expressed as Diffusion flux (J)
•J = mass (or number of atoms) diffusing through and perpendicular to a unit crosssectional
area of solid per unit of time.
Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf Materials Engineering Midterm Exam #2.pdf
