純アルミニウムの圧延集合組織の形成

抄録

Growth-twinned polycrystalline aluminum of which crystallographic orientation was three-dimensionally controlled was cold-rolled in the directions {111} <112>, {111} <110>, {001} <100> and {001} <110>. Analyses of pole figures and slip lines lead to understanding of the formation of the rolling textures and the factors contributing to it, such as grain boundaries, neighboring grains and twin planes.
Symmetrical geometry of the active slip systems about a plane containing ND-RD is an important factor to govern the formation of rolling textures of a pure metal type. Finally stable orientations are {110} <112>, {112} <111> and n {123} <121>.
If the active slipping direction lies symmetrically on the ND-RD plane, deformation bands are formed when the slip systems are unstably active due to oscillation of the stress and when the slip systems lie unsymmetrically on the ND-RD plane resulting in increase in 1/μ of the slip systems.
Grain boundaries, twin planes and neighboring grains often cause independent actions of the slip systems having the maximum resolved shear stress in polycrystalline aluminum. The slip rotation in a single crystal is hardly applicable to each grain of polycrystalline aluminum.