Term
1. Body-centered cubic (bcc)
2. Face-centered cubic (fcc)
3. Hexagonal close-packed (hcp) |
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Definition
| 3 basic atomic arrangements in metals |
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Term
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Definition
Area under true stress–true strain curve up to fracture
is known as the |
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Term
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Definition
Arrangements can be modified by adding
atoms of other metals known as |
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Term
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Definition
Electrons in outer orbits
are shared by atoms to
form molecules
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Term
| Solid-metal embrittlement |
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Definition
Embrittlement occur at temperatures below the melting
point of the embrittling element
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Term
| Liquid-metal embrittlement |
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Definition
| Embrittling element is in a liquid state |
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Term
breaking or
fracture stress |
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Definition
| Engineering stress at fracture is called |
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Term
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Definition
| Give 1 exmaple of a metal or alloy |
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Term
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Definition
Metals have few electrons
in their outer orbits, thus
cannot complete the outer
shell of other self-mated
atoms |
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Term
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Definition
Presence of hydrogen can reduce ductility and cause
embrittlement and premature failure in many metals,
alloys, and nonmetallic materials
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Term
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Definition
Properties of the metal can be recovered by
heating the metal to a specific temperature
range for a given period of time
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Term
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Definition
When a single crystal is subjected to an
external force, it returns to its original shape
when the force is removed |
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Term
| Grain-boundary embrittlement |
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Definition
| When exposed to certain low-melting-point metals |
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Term
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Definition
When force increased, the crystal does not
return to its original shape when the force is
removed |
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Term
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Definition
When one or more electrons
are transferred from one
material to another, a strong
attractive force develops
between the two ions |
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Term
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Definition
capacity of a material to absorb energy when it is
deformed elastically |
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Term
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Definition
| description of the arrangment of atoms or ions in a material |
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Term
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Definition
| different ways for shaping materials into useful compenents or changing there properties |
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Term
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Definition
| give 1 example of a composite |
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Term
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Definition
| give 1 example of a polymer |
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Term
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Definition
| give 1 example of a semiconductor |
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Term
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Definition
| give 1 example of ceramics or glass |
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Term
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Definition
is the extent of plastic deformation that the
material undergoes before fracture |
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Term
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Definition
is the resistance to fracture of a material
when load is applied |
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Term
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Definition
is where a portion of the crystal
forms a mirror image of itself across the plane |
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Term
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Definition
is where one plane of atoms slide
over an adjacent plane (slip plane) under a
shear stress
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Term
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Definition
| mass per unit volume of a material |
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Term
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Definition
| occurs with little plastic deformation |
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Term
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Definition
plastic deformation which precedes
failure
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Term
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Definition
| process by which materials are made from naturally occuring or other materials |
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Term
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Definition
strength of a material
divided by its density |
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Term
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Definition
the development of
cracks after a single thermal cycle |
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Term
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Definition
the rate at which
heat flows within and through a material
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Term
1. Metals and Alloys
2. ceramics/glass
3. polymers
4. semiconductors
5. compsite material |
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Definition
| what are the 5 classifications of materials |
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Term
Temperature
Corrosion
Fatigue
Strain Rate |
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Definition
what factors must be accounted for in
design to ensure that components do not fail
unexpectedly: |
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Term
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Definition
what influences
the mechanical
properties of metals
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Term
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Definition
what is the elongation under stress over
time, usually at elevated temperatures
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Term
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Definition
what is caused by local melting of a
constituent or of an impurity in the grain boundary at a
temperature below the melting point of the metal itself |
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Term
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Definition
where carbon atoms in steels segregate
to dislocations and pinning the dislocations |
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Term
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Definition
a indication of the strength of the material
and of its resistance to scratching and to wear |
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Term
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Definition
is a method for determining the
mechanical properties of materials |
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Term
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Definition
results from thermal
cycling and causes a number of surface
cracks |
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Term
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Definition
| gold is more ***** than cast iron, which is relatively brittle |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| reflects the relationship between its response or deformation to an applied load or force |
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Term
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Definition
| resistance to plastic deformation like scratching |
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Term
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Definition
| capacity of a material to absorb energy when it is deformed elastically |
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Term
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Definition
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Term
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Definition
| is the resistance to fracture of a material when a load is applied |
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Term
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Definition
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Term
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Definition
| characteristic, reactions to stimuli, behaviour |
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Term
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Definition
| the failure of a member under the action of repeated alternating nominal stress |
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Term
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Definition
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Term
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Definition
| the ability of amaterial to resist applied forces without yeilding or fracturing |
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Term
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Definition
has effects on expansion or contraction of different materials in assemblies
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Term
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Definition
results from thermal cycling and causes a number of surface cracks
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