Local microstructural characterization of an aged UR45N rolled steel: Application of the nanogauges grating coupled EBSD technique

Joseph Marae Djouda 1, 2, 3 Benoît Panicaud 1 Fabrice Gaslain 4 Jérémie Beal 2 Yazid Madi 4, 3 Guillaume Montay 1 Léa Le Joncour 1 Julien Gardan 3 Naman Recho 3 Jérôme Crépin 4 Thomas Maurer 2
1 LASMIS - Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée
ICD - Institut Charles Delaunay
2 L2n - Lumière, nanomatériaux et nanotechnologie
ICD - Institut Charles Delaunay
3 Ermess EPF
4 MAT - Centre des Matériaux
Abstract : In the present article, metallic nanoparticles (NPs) used as nanogauges and electron backscattered diffraction (EBSD) are combined to investigate deformation mechanisms of the UR45 N duplex steel. The kinematic fields bring precious details in the evolution of the local deformation of austenitic and ferritic phases. The crystallographic information at the initial stage and in the plastic domain is obtained by the EBSD technique. Strain evolutions in each phase are analyzed. The first strain marks appear in austenite just before the elastoplastic transition. Slip and twinning activities in austenite constitute an important part of the work hardening of the material. The slips in ferrite are visible in the plastic domain and present complex geometry. The role of phase boundaries, which act as strain barrier is highlighted. The incompatibilities of deformations between the two phases modify the deformation mechanism of austenite in comparison with a pure austenitic stainless steel as 316 L. Local interactions between phases during the deformation are analyzed. The strong strain heterogeneities in the plastic domain are analyzed in the kinematic fields. Local evolutions of the deformation are also confronted to the macroscopic behavior of the material.
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Journal articles
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https://hal-utt.archives-ouvertes.fr/hal-02279180
Contributor : Jean-Baptiste Vu Van <>
Submitted on : Thursday, September 5, 2019 - 9:53:15 AM
Last modification on : Monday, September 16, 2019 - 4:35:58 PM

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PARISTECH | ENSMP | ENSMP_MAT | INSTITUT-TELECOM | P2MN | PSL | UTT

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Joseph Marae Djouda, Benoît Panicaud, Fabrice Gaslain, Jérémie Beal, Yazid Madi, et al.. Local microstructural characterization of an aged UR45N rolled steel: Application of the nanogauges grating coupled EBSD technique. Materials Science and Engineering: A, Elsevier, 2019, 759, pp.537-551. ⟨10.1016/j.msea.2019.05.059⟩. ⟨hal-02279180⟩

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