Efecto del cambio en el camino de deformación en la formabilidad de chapas de acero DP-780 y zinc Zn20
AUTOR(ES)
Schwindt, Claudio Daniel, Schlosser, Fernando, Signorelli, Javier Walter
FONTE
Matéria (Rio J.)
DATA DE PUBLICAÇÃO
19/07/2018
RESUMO
ABSTRACT The Forming Limit Diagram (FLD), frequently used to characterize the formability of sheet metals, is determined by assuming proportional loading histories up to the onset of necking. However, the limit strains are highly affected by strain-paths changes, which are very usual in real metal forming processes. The aim of this work is to analyze the effect of the loading history on the FLDs of a 0,9 mm thick DP-780 steel sheet and a 0,65 mm thick Zn20 zinc sheet by applying two-stage tests. The forming limits are studied under uniaxial deformation for the biaxially pre-deformed materials. The reference FLD was obtained by hydraulic bulge tests and uniaxial tests with different samples geometries. The limit strains of the pre-deformed DP-780 steel sheet are above the reference FLD, which reveals a non-negligible dependency between the material formability and the loading history. On the other hand, the differences between the FLDs of the zinc sheet are significant. This is attributed not only to the effect of changes in the strain path, but also to the continuous dynamic recrystallization experienced by the material at room temperature.
Documentos Relacionados
- El camino hacia lo Halal: Ética y sacralización de los alimentos en la vida del musulmán en Guadalajara
- El carbón vegetal en Brasil y la producción de acero.
- Causalidad, iconicidad y continuidad: el efecto del conocimiento previo sobre el mundo en la comprensión de relaciones causales
- Efecto del raleo sobre el crecimiento y la densidad de la madera de Pinus taeda implantado en Misiones, Argentina
- Prebióticos y su efecto en la biod sponibilidad del calcio