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A methodology to obtain data at the slip-band scale from atomic force microscopy observations and crystal plasticity simulations. Application to hydrogen-induced slip localization on AISI 316L stainless steel

Article dans une revue avec comité de lecture
Author
AUBERT, Isabelle
ccSAINTIER, Nicolas
OLIVE, Jean-Marc
PLESSIER, François

URI
http://hdl.handle.net/10985/11014
DOI
10.1016/j.actamat.2015.11.042
Date
2016
Journal
Acta Materialia

Abstract

A local approach coupling atomic force microscopy (AFM) observations and polycrystal finite element calculations is proposed to provide data at the slip-band scale. From AFM measurements of slip bands emerging at the specimen surface during tensile loading, and from numerical results of strain fields at the grain scale, the method is able to determine at the local discrete scale the mean slip-band spacing and the number of dislocations emerging during the plastic strain. The methodology applied in the hydrogen embrittlement context highlights, quantitatively, at the grain scale an increased plastic strain localization with internal hydrogen.

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