RESIDUAL COMPRESSIVE STRESS .
Residual stresses are those stresses remaining in a part after all manufacturing operations are completed,
and with no external load applied. These residual stresses can be either tensile or compressive. For example,
a welded joint will contain high magnitude residual tensile stresses in the heat affected zone adjacent to the weld.
Conversely the surface of induction hardened components may contain residual compressive.
In most applications for shot peeing, the benefit obtained is the direct result of the residual compressive stress produced, A typical profile of residual compressive stress produced. A typical profile of residual compressive stress as it changes with depth is shown in figure below.
( + )
Tension + 100 |
( - )
-100 Compression |
|