Chapter 5: Mechanical Properties of Metals Flashcards
Metals are known to be:
Malleable & Ductile
High density
High Melting Point
High Thermal Conductivity
High Electric Conductivity
how much force an
object can withstand without bending
or breaking (compression, tension, &
shear)
strength
refers to a material’s
response to tensile stress, or its
ability to be stretched, rolled or
extruded without breaking.
ductility
refers to a material’s
response to tensile stress, or its
ability to be stretched, rolled or
extruded without breaking.
ductility
refers to compressive stress, as in
flattening.
malleability
important properties of metals
ductility
malleability
toughness
fatigue resistance
hardness
represents an ideal
balance between strength and ductility.
The toughest metals are those that can
absorb the highest amounts of energy
before fracturing. In simple terms, the
toughest parts are the most difficult to
break
toughness
is a measure of a
part’s ability to undergo repeated,
cyclical stress without fracturing or
permanently deforming.
Fatigue resistance
A material’s power to
resist a permanent change in shape
when acted upon by an external force
hardness
Crystalline Structure of Metals
FCC (Face-centered cubic)
BCC (Body-centered cubic)
HCP (Hexagonal close packed)
mechanical properties of FCC
Low young modulus
Low yield strength
Low hardness
Good ductility and high ability for
forming.
mechanical properties of BCC
High yield strength
High young modulus
High hardness
High tensile strength
Limited ability to forming
mechanical properties of HCP
Brittle
Low yield strength
Inability to forming
The ___ of a material
reflects its response or deformation in
relation to an applied load or force.
mechanical behavior
Key mechanical design properties are
stiffness, strength, hardness, ductility,
and toughness