Micro-deformation evolutions of the constituent phases in duplex stainless steel during cyclic nanoindentation.

ABSTRACT: Cyclic elastoplastic deformation behaviors of austenite phase and ferrite phase in a duplex stainless steel were investigate by load-controlled cyclic nanoindentation with a Berkovich indenter. During the tests, the maximum penetration depth per cycle increased rapidly with cycle number at transient state, and reached stable at quasi-steady state. Plastic dissipated energy was quantitatively proved to be the driving force for the propagation of deformation zones during cyclic nanoindentation tests. Transmission electron microscopy combined with FIB was used to reveal the deformation mechanisms of both phases underneath indents with cycles. After quasi-static single loading, nucleation and concentration of dislocations were observed in both austenite phase and ferrite phase under the indent

SUBMITTER: Cui YY 

PROVIDER: S-EPMC5906455 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature