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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

100%

Rusz S. , Malanik K. , Klos M.

tom 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.