Which of the following is not a characteristic observed in material failure by fatigue fracture ?

Initation of crack occurs on the surface of the machine part.

Plastic deformation of material does not occur.

Initiation of crack from below the surface does not occur.

Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface.

Which of the following is not a characteristic observed in material fa

1.	Which of the following is not a characteristic observed in material failure by fatigue fracture ?
A.	Plastic deformation of material does not occur.
B.	Initiation of crack from below the surface does not occur.
C.	Initation of crack occurs on the surface of the machine part.
D.	Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface.
Answer» C. Initation of crack occurs on the surface of the machine part.

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Which of the following is not a characteristic observed in material failure by fatigue fracture ?

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