Microstructural evolution and mechanical behavior of copper processed by low strain amplitude multi-directional forging.

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Autor(es): dc.creatorFlausino, Paula Cibely Alves-
Autor(es): dc.creatorNassif, Maria Elisa Landim-
Autor(es): dc.creatorBubani, Franco de Castro-
Autor(es): dc.creatorPereira, Pedro Henrique Rodrigues-
Autor(es): dc.creatorAguilar, Maria Teresa Paulino de-
Autor(es): dc.creatorCetlin, Paulo Roberto-
Data de aceite: dc.date.accessioned2025-08-21T15:36:22Z-
Data de disponibilização: dc.date.available2025-08-21T15:36:22Z-
Data de envio: dc.date.issued2020-09-07-
Data de envio: dc.date.issued2020-09-07-
Data de envio: dc.date.issued2019-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/12700-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/abs/pii/S0921509319305489?via%3Dihub-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.msea.2019.04.075-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1019553-
Descrição: dc.descriptionExperiments were performed to analyze the microstructural evolution and mechanical behavior of commercial-purity copper (99.8%) processed by up to 48 cycles of multi-directional forging (MDF) using a low strain amplitude of ∼0.075 (total accumulated strain ε ≈ 10.8). Parabolic work-hardening concomitantly with increasing dislocation densities was observed up to ε ≈ 2, followed by a practically constant flow stress due to dynamic recovery. The average grain size was reduced from 30.5 μm in the annealed metal down to 4.1 μm for ε ≈ 7.2; the fraction of sub-micrometric grains reached ∼12% for ε ≈ 10.8. The microstructural changes were attributed to the fragmentation of the original grains by dislocation structures having low misorientation angles which gradually evolved into arrays of high-angle grain boundaries with increasing numbers of MDF cycles. The Cu samples subjected to 48 cycles of MDF displayed limited dynamic recrystallization, exhibiting basically dislocation cells and sub-grains with an average size of ∼0.6 μm. It is demonstrated that low strain amplitude MDF delays the kinetics of grain refinement in copper compared with MDF using higher strain amplitudes.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectSevere plastic deformation-
Título: dc.titleMicrostructural evolution and mechanical behavior of copper processed by low strain amplitude multi-directional forging.-
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