Test 2 – Materials Engineering
Test
–
2 –
comprehensive
Materials Engineering
study guide
Test
–
and
2 –
comprehensive
exam
Materials
reviewEngineering
material.pdf
study guide
–
and
comprehensive
exam review material.pdf
study guide and exam review material.pdf
Test 2 – Materials
Engineering –
comprehensive
study guide and
exam review
material
Test 2 – Materials Engineering
Test
–
2 –
comprehensive
Materials Engineering
study guide
Test
–
and
2 –
comprehensive
exam
Materials
reviewEngineering
material.pdf
study guide
–
and
comprehensive
exam review material.pdf
study guide and exam review material.pdf
,Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
Driving Force The impetus behind a reaction, such as diffusion, grain growth, or a phase
transformation. Usually attendant to the reaction is a reduction in some type
of energy (e.g., free energy).
Interdiffusion (impurity diffusion) Diffusion of atoms of one metal into another metal
Interstitial Diffusion A diffusion mechanism by which atomic motion is from interstitial site to
interstitial site
Self Diffusion Atomic migration in pure metals
Steady State diffusion The diffusion condition for which there is NO net accumulation or depletion of
diffusing species. The diffusion flux is independent of time.
Vacancy diffusion The diffusion mechanism in which net atomic migration is from a lattice site to
an adjacent vacancy
Ficks first law The diffusion flux is proportional to the concentration gradient. This
relationship is used for steady state diffusion situations.
Ficks second law The time rate of change of concentration is proportional to the second
derivative of concentration. This relationship is used in non steady state
diffusion situations.
Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
,Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
Activation energy The energy required to initiate a reaction, such as diffusion
Carburizing The process by which the surface carbon concentration of a ferrous alloy is
increased by diffusion from the surrounding environment.
Concentration gradient The slope of the concentration profile at a specific position
Concentration profile The curve that results when the concentration of a chemical species is plotted
versus position in a material
Diffusion Mass transport by atomic motion
Diffusion coefficient The constant of proportionality between the diffusion flux and the
concertation gradient in Fick's first law. It's magnitude is indicative of the rate
of atomic diffusion.
Diffusion Flux The quantity of mass diffusion through and perpendicular to a unit cross-
sectional area of material per unit time
Poisson's ratio the negative ratio of lateral and axial strains that result from an applied axial
stress (elastic deformation)
Anelasticity Time-dependent elastic (nonpermanent) deformation
Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
, Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
Design stress Product of the calculated stress level (on the basis of estimated maximum
load) and a design factor (which has a value greater than unity). Used to
protect against unanticipated failure
Ductility A measure of a materials ability to undergo appreciable plastic deformation
before fracture; it may be expressed as percent elongation (%EL) or percent
reduction in area (%RA) from a tensile test
Elastic deformation Deformation that is non permanent- that is, totally recovered upon release of
an applied stress.
Engineering Strain The change in gauge length of a specimen (in the direction of an applied
stress) divided by it's original gauge length
Engineering stress The instantaneous load applied to a specimen divided by its cross-sectional
area before any deformation
Hardness The measure of a materials resistance to deformation by surface indentation
or by abrasion
Modulus of elasticity The ratio of stress to strain when deformation is totally elastic; also a measure
of the stiffness of a material
Plastic deformation Deformation that is permanent or non-recoverable after release of the
applied load. It is accompanied by permanent atomic displacements.
Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
Test
–
2 –
comprehensive
Materials Engineering
study guide
Test
–
and
2 –
comprehensive
exam
Materials
reviewEngineering
material.pdf
study guide
–
and
comprehensive
exam review material.pdf
study guide and exam review material.pdf
Test 2 – Materials
Engineering –
comprehensive
study guide and
exam review
material
Test 2 – Materials Engineering
Test
–
2 –
comprehensive
Materials Engineering
study guide
Test
–
and
2 –
comprehensive
exam
Materials
reviewEngineering
material.pdf
study guide
–
and
comprehensive
exam review material.pdf
study guide and exam review material.pdf
,Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
Driving Force The impetus behind a reaction, such as diffusion, grain growth, or a phase
transformation. Usually attendant to the reaction is a reduction in some type
of energy (e.g., free energy).
Interdiffusion (impurity diffusion) Diffusion of atoms of one metal into another metal
Interstitial Diffusion A diffusion mechanism by which atomic motion is from interstitial site to
interstitial site
Self Diffusion Atomic migration in pure metals
Steady State diffusion The diffusion condition for which there is NO net accumulation or depletion of
diffusing species. The diffusion flux is independent of time.
Vacancy diffusion The diffusion mechanism in which net atomic migration is from a lattice site to
an adjacent vacancy
Ficks first law The diffusion flux is proportional to the concentration gradient. This
relationship is used for steady state diffusion situations.
Ficks second law The time rate of change of concentration is proportional to the second
derivative of concentration. This relationship is used in non steady state
diffusion situations.
Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
,Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
Activation energy The energy required to initiate a reaction, such as diffusion
Carburizing The process by which the surface carbon concentration of a ferrous alloy is
increased by diffusion from the surrounding environment.
Concentration gradient The slope of the concentration profile at a specific position
Concentration profile The curve that results when the concentration of a chemical species is plotted
versus position in a material
Diffusion Mass transport by atomic motion
Diffusion coefficient The constant of proportionality between the diffusion flux and the
concertation gradient in Fick's first law. It's magnitude is indicative of the rate
of atomic diffusion.
Diffusion Flux The quantity of mass diffusion through and perpendicular to a unit cross-
sectional area of material per unit time
Poisson's ratio the negative ratio of lateral and axial strains that result from an applied axial
stress (elastic deformation)
Anelasticity Time-dependent elastic (nonpermanent) deformation
Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
, Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
Design stress Product of the calculated stress level (on the basis of estimated maximum
load) and a design factor (which has a value greater than unity). Used to
protect against unanticipated failure
Ductility A measure of a materials ability to undergo appreciable plastic deformation
before fracture; it may be expressed as percent elongation (%EL) or percent
reduction in area (%RA) from a tensile test
Elastic deformation Deformation that is non permanent- that is, totally recovered upon release of
an applied stress.
Engineering Strain The change in gauge length of a specimen (in the direction of an applied
stress) divided by it's original gauge length
Engineering stress The instantaneous load applied to a specimen divided by its cross-sectional
area before any deformation
Hardness The measure of a materials resistance to deformation by surface indentation
or by abrasion
Modulus of elasticity The ratio of stress to strain when deformation is totally elastic; also a measure
of the stiffness of a material
Plastic deformation Deformation that is permanent or non-recoverable after release of the
applied load. It is accompanied by permanent atomic displacements.
Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf Test 2 Materials Engineering.pdf
