Process Analysis and Numerical Simulation of Equal Channel Angular Pressing and Torsion (ECAPT)

Abstract:

Severe Plastic Deformation (SPD) methods are currently hot research techniques of preparation of bulk ultrafine-grained materials.Among the various SPD methods, ECAP (Equal Channel Angular Pressing) and TE (Twist Extrusion) have respective advantages and disadvantages and there have many questions in this research area at home and abroad although they are representative and rapidly developing and the promising ones.ECAPT, ECAP organic integrated with TE, was introduced for the frist time and the process principle and features were set forth in this study. The numerical simulation of the process was further analyzed with DEFORM-3D software.The results show that there have two main deformation zones in forming process of ECAPT during a single pass, and vertical and horizontal shear deformation have been taken place in workpiece and the value of effective strain is equivalent to accumulated deformation of ECAP and TE after one pass; And the peak and average value of effective strain when ECAPT are far greater than those of effective strain during the process of ECAP or TE. It is confirmed that there have more effective strain rate and more stronger severe plastic deformation during the process of ECAPT,and it improves the ability of material’s plastic deformation.

• Periodical: Advanced Materials Research (Volumes 79-82)
• Pages: 1229-1232
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.79-82.1229
• Online since: August 2009
• Authors: Yong Zhi Li, Ke Min Xue, Ping Li
• Keywords: Deformation Principle, ECAPT, Numerical Simulation, Processing Features, Severe Plastic Deformation (SPD)

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