FINITE ELEMENT ANALYSIS OF SHEAR ANGLE ON DEFORMATION BEHAVIOR OF AlMg-Si ALLOY IN CONSTRAINED GROOVE PRESSING
F. Rahimi1, B. MohammadSadeghi2 and *S. Bakhshivash2, M. Haghshenas3
1
Materials Processing Simulation Laboratory
Iran University of Science & Technology
Tehran, Iran
2
School of Metallurgy & Materials Engineering
Iran University of Science & Technology
Tehran, Iran
(*Corresponding Author: s.bakhshi1994@gmail.com)
3
Department of Mechanical Engineering
University of North Dakota
Grand Forks, North Dakota, USA
ABSTRACT
Constrained groove pressing (CGP), as a severe plastic deformation (SPD) technique, is one of the
most applicable methods for sheet metal forming capable of producing ultra-fine grained materials (UFGMs).
In CGP, processing and die design parameters can significantly affect the deformation response of sheet
metal specimen. Having said this, in the present research the effect of die design variables and processing
parameters (i.e. shear angle and friction) on the deformation behaviour of an Al-Mg-Si Alloy are studied
thoroughly. Finite element analysis (FEA), was used to evaluate the effectiveness of mentioned parameters
on the deformation homogeneity, strain distribution and pressing load variations. Also, mechanical properties
of the deformed sample in term of micro-hardness was analyzed. It is observed that with increasing the shear
angle, effective stress, strain and pressing load are enhanced. Moreover, by increasing friction coefficient,
pressing load enhances and deformation is heterogeneously distributed. The color coded micro-hardness
measurement showed a good agreement with the strain distribution obtained from FEA (higher hardness for
the zones associated with higher shear plastic strain values).
KEYWORDS
Severe plastic deformation, Sheet forming, Aluminum, FEA, CGP.