METALLURGY AND MATERIALS ENGINEERING MODULE V AND VI S3 KTU NOTES [SECOND YEAR]
METALLURGY AND MATERIALS ENGINEERING
MODULE V & VI
A component looses its “Engineering Functionality”
Need not be a Fracture (fragmentation) always
CAUSES
Improper materials selection
Improper processing
Inadequate design of the component
Misuse.
FRACTURE
Simple fracture is the separation of a body into two or more pieces.
In response to an imposed stress that is static (i.e.,
constant or slowly changing with time) and
At temperatures that are low relative to the melting
temperature of the material.
The applied stress may be tensile, compressive, shear, or
torsional
Steps in fracture
crack formation
crack propagation
TYPES OF FRACTURE
Depending on the ability of material to undergo plastic
deformation before the fracture two fracture modes can be
1. Ductile fracture
2. Brittle fracture
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