Both shot peened techniques revealed close to double the hardness measured on the untreated surface.
In conclusion, we have shown that the Nanovea Mechanical Tester, in Nanoindentation Mode, is extremely reliably tool to measure and investigate shot peened surfaces.
Figure 6 shows depth distribution of residual stresses of peened strip (dashed line) and actual stresses of the bent strip.
However, we must remember that the delayed crack in the shot peened 304 SS does not progress beyond 200 [micro]m within 1000 hours.
Characterization of peened
components by x-ray diffraction.
CASE combines vibratory finishing with a chemical accelerant to smooth the surface of the peened
part," Welsch said.
The depth of the compressive stress is a function of the kinetic energy imparted to the peened surface which, in turn, is a function of the mass times the velocity of the shot.
Figure 3 illustrates that from left to right on an intensity curve, the intensity with which a part is being peened increases.
A shot peened
finish is created by impacting spherical particles onto the surface of the material under controlled conditions.
We focus our attention to the threshold strain or stress to cause the delayed fracture of peened
The strips are peened
on one side and in the same conditions that are used for the work piece.
Springs are now peened
in-house within the totally enclosed shotblast machine.