Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1579772 | Materials Science and Engineering: A | 2009 | 5 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Kamila Amato de Campos, Celso Yoshino, Luis Rogerio de Oliveira Hein,