Properties of Metal Flashcards
It is determined by the percentage of parent metal and other elements used to make an alloy.
metal’s strength
Stress Strain Curve
U -
R -
Y -
E -
P -
Ultimate Strength
Rupture Strength
Yield point
Elastic limit
Proportial limit
It is the maximum tensile load per unit area which a material can withstand
Tensile Strength
It is the ability of metal to resist deformation.
Yield Strength
It is the maximum stress a material can
sustain without rupture.
Ultimate Strength
It is the maximum stress expected in any
structural member.
Limit Strength
describes a metal’s ability to
resist opposing forces.
Shear Strength
the ability of a joint to withstand any
form of crushing or excessive compressive distortion.
Bearing Strength
It is defined as a material’s ability to resist
deformation under load.
Flexural Strength
is the greatest stress a material can withstand without a permanent deformation remaining
upon complete release of the load.
Elastic Limit
is the load per unit are acting on a materials
Stress
is the deformation of a material caused by an applied load
Strain
is the greatest stress at which strain (deformation) is directly proportional to
stress.
Proportional Limit
is a stress a material can withstand without resulting in permanent elongation of more than 0.0001 inch per inch of gage length after complete release of stress.
Proof Stress
– is the difference in gage length before being subjected to any strength and after rupture.
Elongation
– is the difference between the original cross-sectional area and the least cross-sectional area after rupture.
Reduction of Area
This is any strain remaining after removing the stress.
Permanent Set
– is the ratio of ultimate stress to limit stress. For nearly all aircraft design, the ultimate factor is 1.5
Ultimate Factor (Factor of Safety)
– ultimate factor minus 1
Margin of Safety
– the ratio of maximum to minimum stress applied in one cycle of loading in fatigue test.
Stress Ratio
– is the ratio of applied load per deformation
Stiffness Ratio
– is the ratio of lateral strain to axial strain
Poisson’s Ratio
refers to its ability to resist cutting,
penetration, or abrasion.
Hardness
Some metals are hardened through ________ ,
while others are softened by a process called
__________.
heat-treating or work-hardening, annealing
describes a material’s tendency to break or shatter when exposed to stress, and is the opposite of ductility and malleability
Brittleness
A material’s ability to be bent, formed, or shaped
without cracking or breaking
Malleability
The ability of metal to be drawn into wire stock,
extrusions, or rods
Ductility
a material’s ability to resist tearing or breaking,
when it is bent or stretched
Toughness
describes a metal’s tendency to return to its
original shape after normal stretching and bending
Elasticity
the property which enables a metal to carry
heat or electricity
Conductivity
The property of a metal to expand when heated and shrink when cooled
Expansion and
Contraction
The ability of metal to be joined
by heating and melting is
Fusibility
material’s mass per unit volume.
Density
