The tests that he performed are the 4-point bending fatigue tests on beams. See one of the posts below for the set-up. What comes out of the tests is that the optimum healing temperature is 85 C. The tests are done on 'fresh' samples and samples that are artificially aged to an age of about 5 years. The healing performance and fatigue life extension ratio of the fresh and aged samples is almost equal. In the aged samples we see a slight decrease of 2%.
In the graph below the fatigue life extension ratio is plotted for tests were we only had natural healing (just rest periods) and were we had our induction healing combined with rest periods.
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