Comparison of the low and high/very high cycle fatigue behaviors in Ni microbeams under bending

The present work demonstrates a micromechanical technique to investigate the low cycle fatigue (LCF) behavior of Ni microbeams under fully reversed bending loadings. extends range measured lives from previously reported for high and very (HCF/VHCF) characterization in same microbeams. results highlight significant differences slope stress strain-life crack propagation rates that differ an average 10–12 m/cycle HCF/VHCF 10–8 LCF. These results, addition postmortem fractography work, suggest mechanisms follow conventional tip intensification LCF regime. This is stark contrast void-controlled were identified demonstrate transition governing highly influenced by size effects