THE COVERAGE FORM OF SURFACE COATING AND CRACK OF BASAL BODY UNDER MULTI-IMPACT LOADS

摘要

During the experiment for thick test piece with laser coating under multi-impact loads. We discover that the margin of stress force with the form of Total covering is lower than that with the form of partial covering. However, the life of the former is longer than the latter when they are under the same multi-impact stress force action. There will be an intensely deformative hardening and material floating phenomena on the lower part of the edge of covered coating on the basal body of the latter. And the same time, flaw is more easily to come into being and spread at this place, then cause abscission of coat.