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29 Dec 2014 To perform this, six different configurations were used in the design of the die's channel for ECAP (equal channel angular pressing) to obtain nanostructure materials and to optimize the process. Thanks to simulation performed with FEM, it is possible to study the homogeneity in the deformation due to the
improvement of ECAP in terms of die design and in ECAP process. This paper describes the various types of newly . The rotary die is used when the material under ECAP requires multiple passes. Here the multiple confined punch helps to guide the material in the required direction and the movable punch moves in
was detection by measuring the microhardness as a func- tion of strain hardening. The microhardness measurements. LOCAL ANALYSIS OF PLASTIC DEFORMATION IN ECAP AND ECAR. PROCESSES. Fig. 1. Scheme of: a) ECAP and b) ECAR method. ?. Die wo rkpice. F. Die. Guide roll. Guide roll. ? workpice r. R
Finite element analysis and optimization of equal channel angular pressing for producing ultra-fine grained materials. Article · April 2007 The obtained count results and rules can offer valuable guidelines for ECAP die geometries optimization and uniformity effective strain distribution in the workpiece. CitationsCitations36
20 Jun 2011 The present paper offers guidelines on die design and manufacture, emphasizing geometry, material and heat treatment. Further, operational parameters such as lubrication, pressing temperature, deformation routes, die closure procedure and the influence of channel cross section on maximum acceptable
8. Assembly of the symmetric ECAP die, including the main body with the guiding and filling plates mounted to form the first and second channel of the die, and the holder for the two billets. The billet size can vary from 9.5 ? 9.5 to 25 ? 25 mm, with the length of 102 mm. 168. 9. The components of the sharp-corner ECAP die.
Equal Channel Angular Pressing (ECAP) is currently one of the most popular methods for fabricating Ultra-Fine Grained (UFG) materials. In this work, ECAP process has been performed on commercial pure aluminum up to 8 passes by route A. After verification of FEM work, the influences of four die channel angles, three

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March 2018