Optimizing the equal channel angular pressing process (ECAP) operation parameters to produce bulk nanostructure materials

Journal Article · Mon Mar 30 04:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4914195· OSTI ID:22391283

Abushgair, K. ^[1]

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1. Khaleel. Abu-Shgair, Al-Balqa Applied University, Amman, Jordan. [e-mail] (Jordan)

In this work we were interested in doing simulation using finite elements analysis (FEA) to study the equal channel angular pressing process (ECAP), which is currently one of the most popular methods of severe plastic deformation Processes (SPD). for fabricating Ultra-Fine Grained (UFG) materials, because it allows very high strains to be imposed leading to extreme work hardening and microstructural refinement. The main object of this study is to establish the influence of main parameters which effect ECAP process which are magnitude of the die angle and the friction coefficient. The angle studied between (90-135°) degree, and magnitude of the friction coefficient μ between (0.12-0.6), and number of pass. The samples were made from aluminum alloy at room temperature with (15X 15) mm cross section and 150 mm length. The simulation result shows that normal elastic strain, shears elastic strain, and max. shear elastic strain increased, when changing the angle from 90° to 100°. and decrease between the angle 110° to 135°. Also the total deformation increased when we change die angle from 90° to 135°. By studding the friction effect on the die and sample we noted that increasing the friction coefficient from 0.12 to 0.6, normal elastic strain, and shear elastic strain increased and increasing the friction coefficient from 0.1 to 0.6 decrease the normal and shear stress.

• OSTI ID: 22391283
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1653; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM ALLOYS
COMPUTERIZED SIMULATION
DEFORMATION
FRICTION
FRICTION FACTOR
GRANULAR MATERIALS
MICROSTRUCTURE
NANOMATERIALS
NANOSTRUCTURES
OPTIMIZATION
PLASTICITY
PRESSING
SHEAR
STRAIN HARDENING
STRAINS
STRESSES
TEMPERATURE RANGE 0273-0400 K