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Open AccessArticle

Characterization and Corrosion Resistance Behavior of Shape Memory Stainless Steel Developed by Alternate Routes

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Postgraduate Program in Aeronautical and Mechanical Engineering, Aeronautical Institute of Technology, Vila das Acácias, Sao José dos Campos 12200-000, Brazil
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Institute of Physics and Chemistry, Federal University of Itajubá. Av. BPS, 1303-Pinheirinho, Itajubá 37500903, Brazil
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Postgraduate Program in Materials Science and Engineering, Federal University of São Carlos. Rod. Washington Luís, km 235-SP-310, São Carlos 13565906, Brazil
4
Postgraduate Program in Materials Science and Engineering, Federal University of Alfenas. Rod. José Aurélio Vilela, Poços de Caldas 11999, Brazil
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 13; https://doi.org/10.3390/met10010013
Received: 20 November 2019 / Revised: 10 December 2019 / Accepted: 10 December 2019 / Published: 20 December 2019
(This article belongs to the Special Issue Surface Engineering of Metals and Alloys)
The microstructural characterization and corrosion resistance behavior of Fe-Mn-Si-Cr-Ni alloy with shape memory effect was studied under different mechanical processing conditions and heat treatments, which were produced using conventional casting and routing methods to reduce costs and make production viable. Microstructural characterization was performed with electron microscopy and x-ray diffraction techniques, electrochemical tests with polarization, and thermogravimetry techniques. The cast condition presented a dendritic structure and the presence of the secondary phases: ferrite-δ and Chi-X phase. The heat treatment eliminated phases, reincorporated elements in the matrix, and increased the austenitic grain. After the hot rolling process, the alloy exhibited a refined microstructure with recrystallized austenitic grains. The heat-treated condition presented better oxidation resistance than the other conditions, while the hot-rolled condition showed repassivation of the pits, raising them to higher levels. All conditions presented low corrosion resistance in environments containing chloride ions. View Full-Text
Keywords: shape memory alloy; stainless steel; corrosion behavior shape memory alloy; stainless steel; corrosion behavior
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Dias, D.; Nakamatsu, S.; Della Rovere, C.A.; Otubo, J.; Mariano, N.A. Characterization and Corrosion Resistance Behavior of Shape Memory Stainless Steel Developed by Alternate Routes. Metals 2020, 10, 13.

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