dc.contributor | Paulo Roberto Cetlin | |
dc.contributor | http://lattes.cnpq.br/0395636448599186 | |
dc.contributor | Maria Teresa Paulino Aguilar | |
dc.contributor | Antônio Eustáquio de Melo Pertence | |
dc.contributor | Haroldo Béria Campos | |
dc.contributor | Elaine Carballo Siqueira Corrêa | |
dc.contributor | Wellington Lopes | |
dc.creator | Cleber Granato de Faria | |
dc.date.accessioned | 2022-06-20T18:36:39Z | |
dc.date.accessioned | 2022-10-04T00:33:53Z | |
dc.date.available | 2022-06-20T18:36:39Z | |
dc.date.available | 2022-10-04T00:33:53Z | |
dc.date.created | 2022-06-20T18:36:39Z | |
dc.date.issued | 2019-02-05 | |
dc.identifier | http://hdl.handle.net/1843/42560 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3834934 | |
dc.description.abstract | The growing need for materials with multifunctional properties has motivated the
development of new alloys and processing techniques. Among these materials, the high
strength ones obtained via SPD (Severe Plastic Deformation) stand out. The two most
important SPD techniques are ECAP (Equal Channel Angular Pressing) and MAC
(Multi-Axial Compression) due to the possibility of processing industrial sized samples,
which would allow commercial applications. However, the strength gained by processing
is usually accompanied by a ductility loss, which is necessary for further metal forming
operations. It has been shown that the mechanical behavior of materials submitted to
multi-axial deformation can either work harden or soften. The expected behavior depends
on the initial condition and the strain amplitude employed. It was also observed that MAC
is capable of increasing work hardening capabilities of previously deformed materials.
Therefore, MAC could be used to recover the lost ductility of materials previously
submitted to ECAP, further increasing its applications. The present research main goal
was to evaluate the influence of low strain amplitude (0.075) MAC on the mechanical
behavior of commercial pure aluminum samples (99.97%) previously processed by one
ECAP step. The results pointed out that the material softened and partially recovered its
work hardening capability after MAC processing. This behavior was attributed to the
stabilization of the dislocation structure developed during ECAP to a predominately
HAGB (High Angle Grain Boundaries) configuration. | |
dc.publisher | Universidade Federal de Minas Gerais | |
dc.publisher | Brasil | |
dc.publisher | ENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA | |
dc.publisher | Programa de Pós-Graduação em Engenharia Metalúrgica, Materiais e de Minas | |
dc.publisher | UFMG | |
dc.rights | Acesso Aberto | |
dc.subject | SPD | |
dc.subject | Multi-axial compression | |
dc.subject | MAC | |
dc.subject | ECAP | |
dc.title | Encruamento e evolução microestrutural do alumínio submetido à compressão multiaxial (MAC) após ECAP | |
dc.type | Tese | |