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Mechanical processing of ultrafine-grained materials produced by severe plastic deformation

Abstract

Microdrawing and micromachining are two advanced fabrication processes of a component in which at least two dimensions are below the millimetre. With such a reduced scale, the plastic and elastic anisotropies of coarse grained materials are very important, since they cause enhancement of crystallographic texture and deformation heterogeneity much larger than when the material has a small grains size. All techniques of Severe Plastic deformation are particularly suited to the above-mentioned manufacturing processes, because their leading effect is grain refining, from which a new class of materials known as "ultrafine grain size" is originated. What distinguishes a particular DPS process from the others is the kind of viscoelastic flow of the material and the deformation path. Thus, processes leading to a high level of shear and characterized by a non-conservative deformation path produce a quite random crystallographic distribution and lower anisotropy. This proposal has two main objectives:1) Extend the asymmetric rolling process to accumulative roll bonding for producing sheets of low crystallographic anisotropy;2) The study of the behavior of DPS processed materials, and its application to micro-deformation and micromachining processes. The project will be developed along the following lines:1) Study of the asymmetrical rolling process in terms of the deformation level and distribution, and the influence of the processing parameters on the total shear deformation of the sheet.2) Determination of the deformation and annealing textures of the sheets3) Application of the asymmetric rolling technique to the DPS process of accumulated rolling. This investigation is original and there are no mention of it in the literature.4) Initial studies for applying these processed materials to micromachining and microforming. (AU)

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Scientific publications (5)
(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)
CAMILO MAGALHAES, DANIELLE CRISTINA; KLIAUGA, ANDREA MADEIRA; SORDI, VITOR LUIZ. Flow behavior and fracture of Al-Mg-Si alloy at cryogenic temperatures. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, v. 31, n. 3, p. 595-608, MAR 2021. Web of Science Citations: 0.
BRAGA, DIOGO PEDRINO; CAMILO MAGALHAES, DANIELLE CRISTINA; KLIAUGA, ANDREA MADEIRA; DELLA ROVERE, CARLOS ALBERTO; SORDI, VITOR LUIZ. Microstructure, mechanical behavior and stress corrosion cracking susceptibility in ultrafine-grained Al-Cu alloy. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 773, JAN 31 2020. Web of Science Citations: 0.
DE GODOI, RENAN PEREIRA; CAMILO MAGALHAES, DANIELLE CRISTINA; AVALOS, MARTINA; EDUARDO BOLMARO, RAUL; SORDI, VITOR LUIZ; KLIAUGA, ANDREA MADEIRA. Microstructure, texture and interface integrity in sheets processed by Asymmetric Accumulative Roll-Bonding. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 771, JAN 13 2020. Web of Science Citations: 0.
CAMILO MAGALHAES, DANIELLE CRISTINA; KLIAUGA, ANDREA MADEIRA; HUPALO, MARCIO FERREIRA; CINTHO, OSVALDO MITSUYUKI; DELLA ROVERE, CARLOS ALBERTO; FERRANTE, MAURIZIO; SORDI, VITOR LUIZ. The influence of Cryo-ECAP and aging on the microstructure and mechanical behavior of AA6061 Al alloy. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 768, DEC 19 2019. Web of Science Citations: 1.
ZANCHETTA, BIANCA DELAZARI; DA SILVA, VANESSA KAROLINE; SORDI, VITOR LUIS; RUBERT, JOSE BENAQUE; KLIAUGA, ANDREA MADEIRA. Effect of asymmetric rolling under high friction coefficient on recrystallization texture and plastic anisotropy of AA1050 alloy. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, v. 29, n. 11, p. 2262-2272, NOV 2019. Web of Science Citations: 0.

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