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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
Bernardi, Heide Heloise [1, 2] ; Zschommler Sandim, Hugo Ricardo [1] ; Zilnyk, Kahl Dick [3] ; Verlinden, Bert [4] ; Raabe, Dierk [5]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Escola Engn Lorena, YR-12600970 Lorena, SP - Brazil
[2] Prof Jessen Vidal FATEC SJC, Fac Tecnol Sao Jose dos Campos, BR-12247 Sao Jose Dos Campos, SP - Brazil
[3] Inst Fed Educ Ciencia & Tecnol Sao Paulo, BR-18202000 Itapetininga, SP - Brazil
[4] Katholieke Univ Leuven, Dept Mat Engn, B-3001 Leuven - Belgium
[5] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf - Germany
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 20, n. 5, p. 1238-1247, SEP-OCT 2017.
Citações Web of Science: 3
Resumo

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). (AU)

Processo FAPESP: 04/14875-0 - Processamento e caracterização microestrutural de nióbio deformado plasticamente por extrusão em canal angular
Beneficiário:Heide Heloise Bernardi
Linha de fomento: Bolsas no Brasil - Doutorado Direto