Analysis of Hydrogen-Induced Changes in the Cyclic Deformation Behavior of AISI 300–Series Austenitic Stainless Steels Using Cyclic Indentation Testing

The locally occurring mechanisms of hydrogen embrittlement significantly influence the fatigue behavior a material, which was shown in previous research on two different AISI 300-series austenitic stainless steels with austenite stabilities. In this preliminary work, an enhanced crack growth as well changes initiation sites and morphology caused by were observed. To further analyze results obtained research, present work local cyclic deformation material volume analyzed using indentation testing. Moreover, these correlated to dislocation structures transmission electron microscopy (TEM) vicinity cracks. tests show decreased hardening potential increased mobility for conditions precharged hydrogen, correlates TEM analysis, revealing courser cells tip. Consequently, presented indicate that localized plasticity (HELP) mechanism leads accelerated change materials investigated. summary, high analysis effects behavior.