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  Microstructural Stability of a Niobium Single Crystal Deformed by Equal Channel Angular Pressing

Bernardi, H. H., Sandim, H. R. Z., Zilnyk, K. D., Verlinden, B. E., & Raabe, D. (2017). Microstructural Stability of a Niobium Single Crystal Deformed by Equal Channel Angular Pressing. Materials Research-Ibero-American Journal of Materials, 20(5), 1238-1247. doi:10.1590/1980-5373-MR-2017-0288.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-6471-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-6E7B-B
Genre: Journal Article

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 Creators:
Bernardi, Heide Heloise1, 2, Author              
Sandim, Hugo Ricardo Zschommler3, Author              
Zilnyk, Kahl Dick4, 5, Author              
Verlinden, Bert E.6, Author              
Raabe, Dierk7, Author              
Affiliations:
1Escola de Engenharia de Lorena, Universidade de São Paulo (USP), Lorena, SP, Brazil, persistent22              
2Faculdade de Tecnologia de São José dos Campos, Prof. Jessen Vidal - FATEC-SJC, São José dos Campos, SP, Brazil, persistent22              
3Escola de Engenharia de Lorena, Universidade de São Paulo, Lorena, 12600-970, Brazil, ou_persistent22              
4Escola de Engenharia de Lorena, University of Sao Paulo, Brazil, ou_persistent22              
5Federal Institute of São Paulo, Itapetininga, Brazil, persistent22              
6Department of Materials Engineering, Katholieke Universiteit Leuven 3001, Leuven, Belgium, persistent22              
7Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              

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Free keywords: SEVERE PLASTIC-DEFORMATION; ELECTRON BACKSCATTER DIFFRACTION; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; TEXTURE EVOLUTION; MODELING TEXTURE; ROLLING TEXTURES; HOT DEFORMATION; ALLOY 800H; EXTRUSIONMaterials Science; Niobium; recrystallization; grain growth; ECAP; EBSD;
 Abstract: A [211]-oriented niobium single crystal was deformed by equal channel angular pressing (ECAP) at room temperature using the route B-c to a total strain of 9.2. A sharp cube texture develops after ECAP processing. The deformed samples were annealed in vacuum from 400 degrees C (673 K) to 900 degrees C (1173 K) for 1 h to evaluate their microstructural stability. Scanning electron microscopy (SEM) was used to image the microstructures of as-deformed and annealed specimens. Electron backscatter diffraction (EBSD) was employed to determine the respective microtextures before and after annealing. Coarsening of the microstructure occurs at a maximum rate at 550 degrees C (823 K) due to discontinuous recrystallization. Normal grain growth replaces discontinuous recrystallization as the main coarsening mechanism above 700 degrees C (973 K).

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Language(s): eng - English
 Dates: 2017-10
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Degree: -

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Title: Materials Research-Ibero-American Journal of Materials
Source Genre: Journal
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Publ. Info: Laboratoria de Materiais Vitreos, Caixa Postal 676, Sao Carlos, 13565-905SP, Brazil : Univ Fed Sao Carlos, Dept Engenharia Materials
Pages: - Volume / Issue: 20 (5) Sequence Number: - Start / End Page: 1238 - 1247 Identifier: ISSN: 1516-1439