Stress in the substrate
05-30-2007, 05:51 PM,
#1
Stress in the substrate
Hallo,
Does sresidual stress in the substrate can cause interlayer disbonding in Arc sprayed coating?
Vijay Deshpande
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06-10-2007, 07:11 AM,
#2
RE: Stress in the substrate
Hi Vijay

High residual stress in a substrate should only effect the coating if those stresses are relieved during or after coating (substrate volume change or distortion). Can't say I've come across this as a problem regarding coatings. If your substrate part is unstable because of high residual stress and is liable to distortion due to temperature change or grit blasting/machining, then I would recommend a stress relieving heat treatment at some stage prior to coating.
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