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MATERIAL PROPERTIES AND BEHAVOUR, Mechanical properties, PHYSCIAL AND…
MATERIAL PROPERTIES AND BEHAVOUR
Material Behavior
MATERIAL PROPERTIES
PHYSCIAL PROPERTIES
~Can be observed or measured without changing the composition of matter.
Appearance , colour , texture , melting point , boiling point ,denity and so on
Three state of matter:
SOLID , LIQUID ,GAS
Thermal properties
Heat capacity
Energy
required to increase a mole of material by a
unit T
Thermal expansion
Change of size of a material with a change in temperature
Thermal conductivity
Transport heat
Thermal shock resistance
The ability of a material to be rapidly cooled and not fracture
Mechanical properties
YIELD STRENGTH
ULTIMATE STRENTH
DUCTILITY
HARDNESS
TOUGHNESS
FATIGUE
CREEP
PHYSCIAL AND CHEMICAL PROPERTIES
THERMAL CONDUCTIVITY
tHERMAL EXPANSION
ELECTRICAL CONDUCTIVTY
MAGNECTIC PROPERTIES
CORROSION
DENSITY
MELTING POINT
CREEP
~is the tendency of a solid material to slowly deform permanently under the influence of stresses.
Only occur when a metal subjected to a constant tensile load at an elevated temperature
The condition for creep occurs is high temperature. Recommend to use high capacity heat of material.
OTHER DEF
: the slow and progressive of a material with time at constant stress
Factor affecting CREEP
TEMPERATURE
LOAD
Composition
Grain size
Heat treatment
Thermal properties
Heat Capacity
~The ability of a material to absorb heat
Thermal conductivity
~The ability of a material to transport heat
Electrical properties
Electrical Conductivity
Electrical Resistance
Fatigue
Cracks generally grow
under repeated loading
Truck passing over bridge
Bicycle pedals
Gear
note: LOT OF EXP AROUND US
~Lowering of strength of failure of a material due
repetive stress