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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2007

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Increasing SPD effectiveness by changing deformation process in the first pass through the ECAP die

Rusz S., Malanik K., Klos M.

Journal of Achievements in Materials and Manufacturing Engineering

2007

Vol. 23, nr 2

79-82

Purpose: Purpose of this paper Technology ECAP belongs to the most efficient technologies for production of materials with ultra-fine grained structure. Its disadvantage consists in necessity to make 4 to 5 passes through the channel of forming tool in order to obtain high degree of deformation needed for grain disintegration. Design/methodology/approach: Newly proposed geometry of the channel makes it possible to achieve up to double amount of deformation during the first pass through deformation tool. Findings: In this manner it is possible to obtain much higher efficiency of the whole process. It is a completely new approach to development of this technology. Research limitations/implications: New geometry of tool has been designed which represents the first step toward application of the given equipment in semi-industrial conditions. Practical implications: Obtained results form good pre-requisite for further development of technology for production of ultra-fine grained materials. Originality/value: Achievement of high amount of deformation already at the first pass through the modified ECAP tool. This will create an ultra-fine grained structure, which makes it possible to obtain required mechanical properties of formability with much lower number of passes. New findings will be applied in the field of forming.