Effects of Grain Size on Surface Roughness of Thin Pure Cooper Sheets in Metal Micro Forming

Abstract

Size effect is a superior occurrence in the micro scale forming. When the distortion or deformation happened on micro scale, the presences of grain size and geometry of the selected material start playing an important role on the material deformation behavior. Here in this study, the influence of size effects on surface roughness is inspected. To investigate the impact of size the workpiece geometry and grain size both are considered in the form of t/d relation ( t= material thickness, d = average grain size). In this exploration, the micro tensile tests was carried out on the copper foil (t = 50 ?m), where to attain different grain sizes, the foil were annealed for different time. The surface roughness of all tensile tested copper samples is tested on the 3D laser-scanning microscope. The identified analysis provides a basis for further vital exploration to understand the influence of size effects in metal micro forming.