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Artikel (Publikationen im Open Access gefördert durch die UB)
On the Influence of Microstructure on the Corrosion Behavior of Fe–Mn–Al–Ni Shape Memory Alloy in 5.0 wt% NaCl Solution
Abstract
Herein the corrosion behavior of Fe–Mn–Al–Ni shape memory alloys characterized by different microstructures in a 5.0 wt% NaCl solution is investigated. Open circuit potential and potentiodynamic polarisation tests are conducted. Generally, Fe–Mn–Al–Ni shows corrosion properties being similar to pure iron. However, the polarization curves of single crystals indicate the presence of an unstable passive system. The corrosion damage is analyzed by means of optical microscopy and electron microscopy. It is revealed that polycrystalline samples consisting of two different phases induced by heat treatment, i.e., α-phase and γ-phase or β-Mn phase and γ-phase, are suffering a selective corrosion attack of the α-phase and β-Mn–phase, respectively. On the contrary, the single crystal seems to form a protective layer on the surface. Upon presence of stress-induced martensite, a selective corrosion attack of γ′–martensite is observed.
Citation
In: Advanced Engineering Materials Volume 23 / Issue 2 (2020-10-03) eissn:1527-2648Sponsorship
Gefördert im Rahmen des Projekts DEALCollections
Publikationen (Fachgebiet Metallische Werkstoffe)Artikel (Publikationen im Open Access gefördert durch die UB)
Citation
@article{doi:10.17170/kobra-202107204380,
author={Frenck, Johanna-Maria and Vollmer, Malte and Mandel, Marcel and Krüger, Lutz and Niendorf, Thomas},
title={On the Influence of Microstructure on the Corrosion Behavior of Fe–Mn–Al–Ni Shape Memory Alloy in 5.0 wt% NaCl Solution},
journal={Advanced Engineering Materials},
year={2020}
}
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2021-07-26T11:53:57Z 2021-07-26T11:53:57Z 2020-10-03 doi:10.17170/kobra-202107204380 http://hdl.handle.net/123456789/13035 Gefördert im Rahmen des Projekts DEAL eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ corrosion Fe–Mn–Al–Ni iron-based shape memory alloys NaCl solution open circuit potential potentiodynamic polarisation 540 600 On the Influence of Microstructure on the Corrosion Behavior of Fe–Mn–Al–Ni Shape Memory Alloy in 5.0 wt% NaCl Solution Aufsatz Herein the corrosion behavior of Fe–Mn–Al–Ni shape memory alloys characterized by different microstructures in a 5.0 wt% NaCl solution is investigated. Open circuit potential and potentiodynamic polarisation tests are conducted. Generally, Fe–Mn–Al–Ni shows corrosion properties being similar to pure iron. However, the polarization curves of single crystals indicate the presence of an unstable passive system. The corrosion damage is analyzed by means of optical microscopy and electron microscopy. It is revealed that polycrystalline samples consisting of two different phases induced by heat treatment, i.e., α-phase and γ-phase or β-Mn phase and γ-phase, are suffering a selective corrosion attack of the α-phase and β-Mn–phase, respectively. On the contrary, the single crystal seems to form a protective layer on the surface. Upon presence of stress-induced martensite, a selective corrosion attack of γ′–martensite is observed. open access Frenck, Johanna-Maria Vollmer, Malte Mandel, Marcel Krüger, Lutz Niendorf, Thomas doi:10.1002/adem.202000865 Korrosion Memory-Legierung Natriumchlorid Polarisation publishedVersion eissn:1527-2648 Issue 2 Advanced Engineering Materials Volume 23 false 200865
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