Shear Pressing for Grain Refinement of Al-Mg-Li Sheet
A novel shear-deformation technique, named ‘shear pressing’ (SP), was developed for fabrication of plate-shaped fine grained metallic materials. The principle of SP is that a material is subjected to shear deformation by utilizing pressing with inclined plane dies. A micrometer order grain structure was obtained in an Al-Mg-Li alloy at strain of ε = -2.3 by utilizing this technique. The grain refinement sequences during pressing were examined by electron backscatter diffraction. The enhancement of grain refinement to the Al-Mg-Li alloy was compared with plane strain compression (PSC) at similar strains. The effect of the shear strain on the accelerated grain refining during compressing has been discussed.
Yafang Han et al.
Y. X. Du et al., "Shear Pressing for Grain Refinement of Al-Mg-Li Sheet", Materials Science Forum, Vols. 546-549, pp. 885-888, 2007