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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: https://hdl.handle.net/21.11116/0000-0001-6471-F Version Permalink: https://hdl.handle.net/21.11116/0000-000B-5FBA-A
Genre: Journal Article

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85c-Raabe-1516-1439-mr-1980-5373-MR-2017-0288.pdf (Publisher version), 8MB
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This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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https://creativecommons.org/licenses/by/4.0/deed.en

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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, ou_persistent22              
2Faculdade de Tecnologia de São José dos Campos, Prof. Jessen Vidal - FATEC-SJC, São José dos Campos, SP, Brazil, ou_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, ou_persistent22              
6Department of Materials Engineering, Katholieke Universiteit Leuven 3001, Leuven, Belgium, ou_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: Issued
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000413793100011
DOI: 10.1590/1980-5373-MR-2017-0288
 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