Micro-deformation evolutions of the constituent phases in duplex stainless steel during cyclic nanoindentation
作者： Yuan-Yuan Cui , Yun-Fei Jia , Fu-Zhen Xuan
DOI: 10.1038/S41598-018-24589-4
关键词: Composite material 、 Materials science 、 Indentation 、 Nucleation 、 Lüders band 、 Austenite 、 Penetration depth 、 Deformation mechanism 、 Nanoindentation 、 Ferrite (iron)
摘要: Cyclic elastoplastic deformation behaviors of austenite phase and ferrite in a duplex stainless steel were investigate by load-controlled cyclic nanoindentation with Berkovich indenter. During the tests, maximum penetration depth per cycle increased rapidly number at transient state, reached stable quasi-steady state. Plastic dissipated energy was quantitatively proved to be driving force for propagation zones during tests. Transmission electron microscopy combined FIB used reveal mechanisms both phases underneath indents cycles. After quasi-static single loading, nucleation concentration dislocations observed under propagated further regions phases. Besides, slip bands generated within subsequent nanoindentation. The sizes after indentation TEM consistent those calculated expansion model spherical cavity.
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