Português
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2020 |
| Outros Autores: | , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | por |
| Título da fonte: | Revista Interdisciplinar de Pesquisa em Engenharia |
| Texto Completo: | https://periodicos.unb.br/index.php/ripe/article/view/26872 |
Resumo: | Powder metallurgy is an important manufacturing process in obtaining various pieces of geometry, making it feasible general industrial large-scale production in some cases with subsequent surface treatment. The objective of this work is demonstrate is to demonstrate the influence of compaction pressure parameters and grinding time in getting the league Al4Cu by powder metallurgy process. Therefore, we evaluated the densification, and microstructure microhardness obtained in the alloy two metallic powders of samples were prepared which were mixed / milled for two hours and for four hours at low rpm , 250 rpm , after unilaterally compacted with cold compacting pressure of 1.5 tf / cm2 to 1.1 tf / cm2 respectively and sintered 610ºC. In each step of the process densities were measured to evaluate the percentage of densification of each sample. The microstructure was observed by Scanning Electron Microscopy (SEM) allowing display of the quantity and pore size, and the shape and size of the grains, as well as Vickers hardness. The results showed that the final density achieved in the sintered samples was low in both compared to the theoretical density of the alloy, but is clearly noted that the compaction pressure influenced in this respect. Another fact that was evident is that the grinding time directly affects the quality of sinter, as homogeneity of the elements in the alloy, porosity and hardness. |
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PortuguêsInfluência dos parâmetros de pressão de compactação e tempo de moagem na obtenção da liga Al4Cu pelo processo de metalurgia do póMetalurgia do pó, Alumínio, Cobre e LigasPowder metallurgy is an important manufacturing process in obtaining various pieces of geometry, making it feasible general industrial large-scale production in some cases with subsequent surface treatment. The objective of this work is demonstrate is to demonstrate the influence of compaction pressure parameters and grinding time in getting the league Al4Cu by powder metallurgy process. Therefore, we evaluated the densification, and microstructure microhardness obtained in the alloy two metallic powders of samples were prepared which were mixed / milled for two hours and for four hours at low rpm , 250 rpm , after unilaterally compacted with cold compacting pressure of 1.5 tf / cm2 to 1.1 tf / cm2 respectively and sintered 610ºC. In each step of the process densities were measured to evaluate the percentage of densification of each sample. The microstructure was observed by Scanning Electron Microscopy (SEM) allowing display of the quantity and pore size, and the shape and size of the grains, as well as Vickers hardness. The results showed that the final density achieved in the sintered samples was low in both compared to the theoretical density of the alloy, but is clearly noted that the compaction pressure influenced in this respect. Another fact that was evident is that the grinding time directly affects the quality of sinter, as homogeneity of the elements in the alloy, porosity and hardness.A metalurgia do pó é um processo de fabricação importante na obtenção de peças de geometria variadas, tornando-se viável na industria em geral em grande escala de produção em alguns casos com o tratamento superficial posterior. O objetivo desse trabalho é demonstrar a influência dos parâmetros de pressão de compactação e tempo de moagem na obtenção da liga Al4Cu pelo processo de metalurgia do pó. Para tanto foram avaliadas a densificação, a microestrutura e a microdureza obtida na liga. Foram preparadas duas amostras de pós metálicos que foram misturadas/moidos por duas horas e por quatro horas, em baixa rotação, 250 rpm, depois compactadas unilateralmente a frio com a pressão de compactação de 1,5 tf/cm2 para 1,1 tf/cm2 respectivamente e sinterizadas 610ºC. Em cada etapa do processo foram medidas as densidades para avaliar o percentual de densificação de cada amostra. A microestrutura foi verificada por Microscopia Eletrônico de Varredura (MEV) possibilitando visualização da quantidade e do tamanho dos poros, bem como a forma e o tamanho dos grãos, além da medição de dureza Vickers. Os resultados demonstraram que a densificação final obtida no sinterizado foi baixo nas duas amostras em comparação com a densidade teórica da liga, porém observou-se claramente que a pressão de compactação influenciou neste aspecto. Outro fato que ficou evidente é que o tempo de moagem afeta diretamente a qualidade dos sinterizados, como homogeneidade dos elementos na liga, porosidade e microdureza.Programa de Pós-Graduação em Integridade de Materiais da Engenharia2020-02-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.unb.br/index.php/ripe/article/view/2687210.26512/ripe.v5i2.26872Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 5 No. 2 (2019): Revista Interdisciplinar de Pesquisa em Engenharia; 100-112Revista Interdisciplinar de Pesquisa em Engenharia; v. 5 n. 2 (2019): Revista Interdisciplinar de Pesquisa em Engenharia; 100-1122447-610210.26512/ripe.v5i2reponame:Revista Interdisciplinar de Pesquisa em Engenhariainstname:Universidade de Brasília (UnB)instacron:UNBporhttps://periodicos.unb.br/index.php/ripe/article/view/26872/25317Copyright (c) 2020 Revista Interdisciplinar de Pesquisa em Engenhariainfo:eu-repo/semantics/openAccessJesus, Luiz Carlos CorreiaBrandão, Sergio MateusGrossi, Lara JardimMuterlle, Palloma Vieirada Luz, Sandra MariaSaraiva, IldonSilva, WelintonRodrigues, Eduardo2020-02-27T19:45:53Zoai:ojs.pkp.sfu.ca:article/26872Revistahttps://periodicos.unb.br/index.php/ripePUBhttps://periodicos.unb.br/index.php/ripe/oaianflor@unb.br2447-61022447-6102opendoar:2020-02-27T19:45:53Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB)false |
| dc.title.none.fl_str_mv |
Português Influência dos parâmetros de pressão de compactação e tempo de moagem na obtenção da liga Al4Cu pelo processo de metalurgia do pó |
| title |
Português |
| spellingShingle |
Português Jesus, Luiz Carlos Correia Metalurgia do pó, Alumínio, Cobre e Ligas |
| title_short |
Português |
| title_full |
Português |
| title_fullStr |
Português |
| title_full_unstemmed |
Português |
| title_sort |
Português |
| author |
Jesus, Luiz Carlos Correia |
| author_facet |
Jesus, Luiz Carlos Correia Brandão, Sergio Mateus Grossi, Lara Jardim Muterlle, Palloma Vieira da Luz, Sandra Maria Saraiva, Ildon Silva, Welinton Rodrigues, Eduardo |
| author_role |
author |
| author2 |
Brandão, Sergio Mateus Grossi, Lara Jardim Muterlle, Palloma Vieira da Luz, Sandra Maria Saraiva, Ildon Silva, Welinton Rodrigues, Eduardo |
| author2_role |
author author author author author author author |
| dc.contributor.author.fl_str_mv |
Jesus, Luiz Carlos Correia Brandão, Sergio Mateus Grossi, Lara Jardim Muterlle, Palloma Vieira da Luz, Sandra Maria Saraiva, Ildon Silva, Welinton Rodrigues, Eduardo |
| dc.subject.por.fl_str_mv |
Metalurgia do pó, Alumínio, Cobre e Ligas |
| topic |
Metalurgia do pó, Alumínio, Cobre e Ligas |
| description |
Powder metallurgy is an important manufacturing process in obtaining various pieces of geometry, making it feasible general industrial large-scale production in some cases with subsequent surface treatment. The objective of this work is demonstrate is to demonstrate the influence of compaction pressure parameters and grinding time in getting the league Al4Cu by powder metallurgy process. Therefore, we evaluated the densification, and microstructure microhardness obtained in the alloy two metallic powders of samples were prepared which were mixed / milled for two hours and for four hours at low rpm , 250 rpm , after unilaterally compacted with cold compacting pressure of 1.5 tf / cm2 to 1.1 tf / cm2 respectively and sintered 610ºC. In each step of the process densities were measured to evaluate the percentage of densification of each sample. The microstructure was observed by Scanning Electron Microscopy (SEM) allowing display of the quantity and pore size, and the shape and size of the grains, as well as Vickers hardness. The results showed that the final density achieved in the sintered samples was low in both compared to the theoretical density of the alloy, but is clearly noted that the compaction pressure influenced in this respect. Another fact that was evident is that the grinding time directly affects the quality of sinter, as homogeneity of the elements in the alloy, porosity and hardness. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020-02-27 |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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https://periodicos.unb.br/index.php/ripe/article/view/26872 10.26512/ripe.v5i2.26872 |
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https://periodicos.unb.br/index.php/ripe/article/view/26872 |
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10.26512/ripe.v5i2.26872 |
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por |
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por |
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https://periodicos.unb.br/index.php/ripe/article/view/26872/25317 |
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Copyright (c) 2020 Revista Interdisciplinar de Pesquisa em Engenharia info:eu-repo/semantics/openAccess |
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Copyright (c) 2020 Revista Interdisciplinar de Pesquisa em Engenharia |
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openAccess |
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application/pdf |
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Programa de Pós-Graduação em Integridade de Materiais da Engenharia |
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Programa de Pós-Graduação em Integridade de Materiais da Engenharia |
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Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 5 No. 2 (2019): Revista Interdisciplinar de Pesquisa em Engenharia; 100-112 Revista Interdisciplinar de Pesquisa em Engenharia; v. 5 n. 2 (2019): Revista Interdisciplinar de Pesquisa em Engenharia; 100-112 2447-6102 10.26512/ripe.v5i2 reponame:Revista Interdisciplinar de Pesquisa em Engenharia instname:Universidade de Brasília (UnB) instacron:UNB |
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Universidade de Brasília (UnB) |
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Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB) |
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