[MME] METALLURGY AND MATERIALS ENGINEERING MODULE V AND VI S3 KTU NOTES FOR KTU STUDENTS [SECOND YEAR]


METALLURGY AND MATERIALS ENGINEERING 

MODULE V & VI 

mme notes,ktu mme notes,ktu notes,metallurgy and material ktu notes,metallurgy and material engineering ktu notes,[MME] METALLURGY AND MATERIALS ENGINEERING MODULE V  AND VI  S3 KTU NOTES FOR KTU STUDENTS [SECOND YEAR]

FAILURE

 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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