NANOMECHANICAL TESTING OF HYDROGEN EFFECTS ON SUPER DUPLEX STAINLESS STEEL
Abstract
The effect of hydrogen on the mechanical properties of the super duplex stainless steel is examined using in situ electrochemical nanoindentation (ECNI) tests. Within the ECNI, which is a nanoindenter combined with an electrochemical setup, the nanoindentation can be made on a surface that is immersed in an electrolyte and in situ electrochemically charged with hydrogen. In situ electrochemical nanoindentation testing captures the change in the onset of plasticity (pop-in load level) as well as the change in the hardness due to the absorption of the atomic hydrogen.
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