Full Constraints Shear Testing Technique on Coarse Grained Material

Abstract

With severe plastic deformation (SPD), ultra-fine grained (UFG) and nanograined materials can be produced. These materials have an exceptionally high yield stress and low strain hardening compared to coarse grained (CG) materials produced by conventional forming techniques. However, with most SPD techniques, only small-sized specimens can be made, which can be insufficient for conventional material testing. A new full constraints shear technique was proposed in a previous paper, where it was tested on UFG material and validated using finite element simulations, analytical, and numerical methods. In this paper, the testing technique was further tested on both UFG and CG materials. The chosen forming methods were the friction assisted lateral extrusion process (FALEP) and cold rolling.