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Transmission of Plasticity Through Grain Boundaries in a Metastable Austenitic Stainless Steel

1
CIEFMA (Center for Research in Structural Integrity, Reliability and Micromechanics of Materials), Departament de Ciència dels Materials i Enginyeria Metal·lúrgica, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain
2
Institut Jean Lamour, UMR CNRS (Unité Mixte de Recherche du Centre National de Recherche Scientifique) 7198, Université de Lorraine, 54000 Nancy, France
*
Author to whom correspondence should be addressed.
Metals 2019, 9(2), 234; https://doi.org/10.3390/met9020234
Received: 17 January 2019 / Revised: 11 February 2019 / Accepted: 12 February 2019 / Published: 15 February 2019
(This article belongs to the Special Issue TRIP Steels)
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Abstract

Austenitic metastable stainless steels have outstanding mechanical properties. Their mechanical behavior comes from the combination of different deformation mechanisms, including phase transformation. The present work aims to investigate the main deformation mechanisms through the grain boundary under monotonic and cyclic tests at the micro- and sub-micrometric length scales by using the nanoindentation technique. Within this context, this topic is relevant as damage evolution at grain boundaries is controlled by slip transfer, and the slip band-grain boundary intersections are preferred crack nucleation sites. Furthermore, in the case of metastable stainless steels, the interaction between martensitic phase and grain boundaries may have important consequences. View Full-Text
Keywords: martensitic transformation; plastic deformation mechanisms; monotonic and cyclic nanoindentation tests; grain boundary; Focused Ion Beam (FIB) martensitic transformation; plastic deformation mechanisms; monotonic and cyclic nanoindentation tests; grain boundary; Focused Ion Beam (FIB)
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Mateo, A.; Sapezanskaia, I.; Roa, J.J.; Fargas, G.; Redjaïmia, A. Transmission of Plasticity Through Grain Boundaries in a Metastable Austenitic Stainless Steel. Metals 2019, 9, 234.

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