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Grant number: 12/16113-6
Support Opportunities:Scholarships in Brazil - Post-Doctorate
Effective date (Start): November 01, 2012
Effective date (End): October 31, 2014
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal Investigator:Sebastião Elias Kuri
Grantee:Carlos Alberto Della Rovere
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil


Since the discovery of the shape memory effect (SME) in Fe-Mn-Si-Cr-Ni shape memory stainless steels (SMSSs), attention has focused strongly on this new class of shape memory alloys because they combine low production cost, excellent workability and good weldability, and show great promise for constrained recovery applications (e.g., in pipe couplings) in various industrial sectors such as the construction, chemical and petrochemical industries. The SME in Fe-Mn-Si-Cr-Ni SMSSs results from the stress-induced ³ ’ µ martensite transformation and its reversion upon heating. Despite their unique properties, Fe-Mn-Si-Cr-Ni SMSSs are currently only used in a few practical applications. Their incomplete SME, low recoverable strains (less than about 2% without treatment) and poor corrosion resistance are the main obstacles to the use of Fe-Mn-Si-Cr-Ni-(Co) SMSSs in engineering applications. Thus, the present proposal aims to contribute to the advancement of scientific and technological development of Fe-Mn-Si-Cr-Ni-(Co) SMSSs, seeking to find an appropriate way of combining incresead SME with a better corrosion resistance. In this work will be used two measures to increase the corrosion performance of Fe-Mn-Si-Cr-Ni-(NbC) SMSSs: (1) to reduce the Mn content of the Fe-Mn-Si-Cr-Ni SMSS and offsetting the loss of SME through equal channel angular pressing (ECAP) and subsequent aging, and (2) to produce a conventional composition of a Fe-Mn-Si-Cr-Ni SMSS with slight addition of Cerium (Ce). The microsctructure of alloys will be characterized by x-ray diffraction (DRX), and optical and scanning electron microscopy (SEM). The SME will be evaluated by differential scanning calorimetry (DSC), traditional bending method and tensite tests. The corrosion behavior will be studied based on immersion tests, electrochemical techniques, X-ray photoelectron spectroscopy (XPS) analyses.

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CARLOS ALBERTO DELLA ROVERE; CELSO ROBERTO RIBEIRO; RODRIGO DA SILVA; NELSON GUEDES DE ALCÂNTARA; SEBASTIÃO ELIAS KURI. Microestrutura e resistência à corrosão de aços inoxidáveis supermartensíticos soldados por fricção radial. Soldagem & Inspeção, v. 19, n. 3, p. 255-263, . (12/16113-6)
DELLA ROVERE, C. A.; RIBEIRO, C. R.; SILVA, R.; ALCANTARA, N. G.; KURI, S. E.. Local mechanical properties of radial friction welded supermartensitic stainless steel pipes. MATERIALS & DESIGN, v. 56, p. 423-427, . (12/16113-6)
DELLA ROVERE, C. A.; AQUINO, J. M.; RIBEIRO, C. R.; SILVA, R.; ALCANTARA, N. G.; KURI, S. E.. Corrosion behavior of radial friction welded supermartensitic stainless steel pipes. MATERIALS & DESIGN, v. 65, p. 318-327, . (12/16113-6)
DELLA ROVERE, C. A.; RIBEIRO, C. R.; SILVA, R.; BARONI, L. F. S.; ALCANTARA, N. G.; KURI, S. E.. Microstructural and mechanical characterization of radial friction welded supermartensitic stainless steel joints. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 586, p. 86-92, . (12/16113-6)
RABELO, L. F. P.; SILVA, R.; DELLA ROVERE, C. A.; DE SOUSA MALAFAIA, A. M.. Metal/oxide interface roughness evolution mechanism of an FeMnSiCrNiCe shape memory stainless steel under high temperature oxidation. Corrosion Science, v. 163, . (12/16113-6)
DIAS, DAVID; NAKAMATSU, SANDRA; DELLA ROVERE, CARLOS ALBERTO; OTUBO, JORGE; MARIANO, NEIDE APARECIDA. Characterization and Corrosion Resistance Behavior of Shape Memory Stainless Steel Developed by Alternate Routes. METALS, v. 10, n. 1, . (12/16113-6)

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