Finite element analysis of the springback behavior after V bending process of sheet materials obtained by Differential Speed Rolling (DSR) method

Vedat  Taşdemir

doi:10.3989/revmetalm.219

Autores/as

Vedat Taşdemir Department of Mechanical Engineering, Simav Technology Faculty, Kütahya Dumlupınar University https://orcid.org/0000-0002-2375-9525

DOI:

https://doi.org/10.3989/revmetalm.219

Palabras clave:

Laminación asimétrica, Flexión, Laminación de velocidad diferencial, Recuperación elástica, Deformación plástica severa

Resumen

El proceso de laminación de velocidad diferencial es un método de deformación plástica severa utilizado en la producción de materiales microestructurados que aplica una alta deformación y permite obtener buenas propiedades mecánicas. Este estudio se ha centrado en determinar el comportamiento de recuperación elástica y la formabilidad de los materiales obtenidos mediante el método de laminación de velocidad diferencial después del proceso de flexión en V. Los procesos de laminación se llevaron a cabo utilizando 4 relaciones de velocidad de laminación diferentes (1.0, 1.33, 1.66 y 2.0), una relación de reducción de espesor del 25% y 2 temperaturas de laminación diferentes (temperatura ambiente y 580 °C). Luego, los materiales laminados se doblaron usando 3 ángulos de matriz de doblado diferentes (60°, 90°, 120°). Como resultado de este estudio, la mayor deformación plástica se alcanzó a una relación de velocidad de 2.0 a 580 °C. De nuevo, la recuperación elástica más baja se obtuvo a 580 °C. A medida que aumentaba el ángulo de la matriz, disminuía la recuperación elástica. Se ha producido una recuperación elástica en el proceso de doblado de todos los materiales laminados obtenidos por laminación. En el proceso de doblado de la plancha de material sin laminar se observaron eventos tanto de avance como de recuperación dependiendo del ángulo de la matriz.

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