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

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, andmore » shear elastic strain increased and increasing the friction coefficient from 0.1 to 0.6 decrease the normal and shear stress.« less
Authors:
 [1]
  1. Khaleel. Abu-Shgair, Al-Balqa Applied University, Amman, Jordan. khaleel45@yahoo.com (Jordan)
Publication Date:
OSTI Identifier:
22391283
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1653; Journal Issue: 1; Conference: APMAS 2014: 4. International Congress in Advances in Applied Physics and Materials Science, Fethiye (Turkey), 24-27 Apr 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 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