| Texto completo | |
| Autor(es): |
Número total de Autores: 3
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| Afiliação do(s) autor(es): | [1] Sao Paulo State Univ, Mat & Technol Dept, BR-12516410 Guaratingueta, SP - Brazil
Número total de Afiliações: 1
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| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 525, n. 1-2, p. 37-41, NOV 15 2009. |
| Citações Web of Science: | 4 |
| Resumo | |
The topography of the fracture surface along the stretch zone of 15-5PH steel is analyzed for a range of specimen thicknesses, providing information on the changes in elastic-plastic behavior. The relationship between the stretch zone width, as a local toughness measurement, and fractal dimension is discussed along with the restrictions imposed by the stress field evolution. Image stacks for extended depth-of-field 3D reconstructions of the stretch zone region were acquired using a reflected light microscope. Significant correlations between the stretch zone width and fractal dimension with specimen thickness were found from measurements on elevation maps, especially at the center regions. This demonstrates that the stretch zone has heterogeneous topographic behavior depending on thickness and is more homogeneous under plane strain states. Finally, a general equation is suggested to describe the stretch zone width dependence on both the fractal dimension and material thickness. (C) 2009 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 08/01788-2 - Fractografia quantitativa: análise do comportamento fractal, por processamento digital de imagens, para delimitação da ação de micromecanismos de fratura em compósitos |
| Beneficiário: | Kamila Amato de Campos |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 01/09664-1 - Comportamento fractal de fraturas em ligas de uso aeronautico. |
| Beneficiário: | Luis Rogerio de Oliveira Hein |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |