Medida das curvaturas do grão em metais

• Ano de defesa: 2007
• Autor(a) principal: Augusto, Fabiana Pinto Miguel
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Programa de Pós-graduação em Engenharia Metalúrgica; Engenharia metalúrgica
• Palavras-chave em Português: Metalurgia física; Crescimento de grão; Metalografia; Aço interstitial-free; CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
• Link de acesso: https://app.uff.br/riuff/handle/1/17569

The grain of any material is formed by a group of atoms which have the same orientation. A set of grains compose the metal structure. The material mechanical properties are directly related to its microstructure, being influenced by the grain size. The mean intercept length, l the grain boundary area per unit of volume, Sv; the mean grain boundary curvature, mean edge curvature, and the mean grain curvature, are metallographic measurements made in a planar section of the material which describes very well this microstructure. At this paper metallographic techniques to perform the described above measurements are applied on: Al-1wt%Mn, steel interstitial free, Niobium-low alloyed steel, electric steel of non-oriented grains and pure iron specimen in order to describe the influence of the grain curvature on grain growth. The resulting experimental data is compared with existing geometric models.