비대칭압연한 알루미늄합금판재의 전단집합조직발달과 결정립미세화 : 전단변형 조합의 영향

Shear Texture Development and Grain Refinement in Asymmetrically Rolled Aluminum Alloy Sheets : Effects of Shear Combinations

Asymmetric rolling, in which the ratio of the rotation rates of the upper and lower rolls was 2, has been used to introduce an intense plastic shear strain for the purpose of grain refinement and developing shear deformation textures through the sheet thickness to improve the strength and plastic strain ratio of AA1050 aluminum alloy sheets. The alloy sheets were rolled at room temperature without lubrication. The textures and microstructures of the sheets were investigated by x-ray diffraction and electron back-scattered diffraction (EBSD) analyses with emphasis on effects of combinations of rot ling directions.