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Abstract

Fatigue damage behavior of freestanding 40 µm-thick Ni foils was investigated. We found that there were evident differences in fatigue behaviors of the foils loaded normal to and parallel to the rolling direction. EBSD analyses revealed that fatigue cracking along grain boundaries (GBs) or slip bands in two kinds of the foils depended on the difference in Schmid factor of the grains along both sides of the GBs and the misorientation angle of the GB. Fatigue damage mechanism was discussed.