Estudo da influência das condições de solidificação em aspectos microestruturais de uma liga de alumínio 7075.
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Data
2020-11-27
Autores
Alves, Vitor Cunha
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Universidade Estadual Paulista (Unesp)
Resumo
O alumínio vem sendo um material cada vez mais utilizado em diversas atividades econômicas ao redor do mundo. Essa crescente utilização coloca em evidência a necessidade de estudar e analisar as variáveis relacionadas a seu uso. A direção de grão está relacionada diretamente com as propriedades do material, principalmente seus aspectos microestruturais. Para controlar essa propriedade existem diversas técnicas e, entre elas, a controle microestrutural. Dessa forma, esse trabalho tem a finalidade de avaliar uma técnica desenvolvida para o controle e orientação microestrutural da liga de alumínio 7075 bem como suas características finais. Para o desenvolvimento desse trabalho as amostras foram preparadas através de um dispositivo de resfriamento unidirecional que isolava termicamente a amostra de forma em que houvesse extração de calor apenas em uma direção. A partir das amostras obtidas, os resultados foram analisados através de um software de domínio público chamado ImageJ, que foi de suma importância para as conclusões e reflexões desse trabalho. Com todos resultados analisados foi possível concluir que existe uma diferença do tamanho dos grãos à medida que se afastavam da zona de resfriamento, bem como uma quantidade expressiva de poros no material, que variavam de tamanho conforme se afastavam da parede fria.
The aluminum has been increasingly used in various economic activities around the world. This growing use highlights the need to study and analyze the variables related to its use. The grain direction is directly related to the material’s properties, mainly its microstructural aspects. To control this property there are several techniques and, among them, the microstructural control. Thus, this works aims to evaluate a technique developed to control the growth of the aluminum alloy 7075 grains as well as their final characteristics. For the development of this work, the samples were prepared using a unidirectional cooling device that thermally isolated the sample so that there was heat extraction in only one direction. From the samples obtained, the results were analyzed using public domain software called ImageJ, which was extremely important for the conclusions and reflections of this work. With the results analyzed, it is possible to conclude that is a difference in the size of the grains as they moved away from the cooling zone, as well as an expressive number of pores in the material, which varied in size as they moved away from the cold wall.
The aluminum has been increasingly used in various economic activities around the world. This growing use highlights the need to study and analyze the variables related to its use. The grain direction is directly related to the material’s properties, mainly its microstructural aspects. To control this property there are several techniques and, among them, the microstructural control. Thus, this works aims to evaluate a technique developed to control the growth of the aluminum alloy 7075 grains as well as their final characteristics. For the development of this work, the samples were prepared using a unidirectional cooling device that thermally isolated the sample so that there was heat extraction in only one direction. From the samples obtained, the results were analyzed using public domain software called ImageJ, which was extremely important for the conclusions and reflections of this work. With the results analyzed, it is possible to conclude that is a difference in the size of the grains as they moved away from the cooling zone, as well as an expressive number of pores in the material, which varied in size as they moved away from the cold wall.
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Palavras-chave
Alumínio, Resfriamento controlado, Orientação microestrutural, Microestrutura, Aluminum, Controlled cooling, Grain, Microstructural orientation, Microstructure, Ligas de alumínio, Solidificação