The process of shot peening increases the fatigue life of steel springs mainly because it results in

increased stiffness of the material

structural changes in the material

residual compression at the surface

The process of shot peening increases the fatigue life of steel spring

1.	The process of shot peening increases the fatigue life of steel springs mainly because it results in
A.	surface hardening
B.	increased stiffness of the material
C.	structural changes in the material
D.	residual compression at the surface
Answer» E.

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The process of shot peening increases the fatigue life of steel springs mainly because it results in

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