OS2003 Mg合金集合組織における双晶形成のその場観察とEBSD解析(OS20-1 双晶,OS-20 HCP金属の実験力学と計算力学)

概要

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A commercial Mg alloy, AZ31B, has been used widely. In the texture of AZ31B sheet, {101^^-2} twin is expected to form by applying an extension strain parallel to the c-axis, which is equivalent to the a-axis compression strain. In this study, an in-situ bending test of AZ31B sheet with a texture was conducted under a confocal scanning laser microscope to observe twinning by applying compression stress along a direction almost perpendicular to the c-axis of grains. In addition, EBSD techniques were used for the analysis of crystal orientation evolution during compression testing. In-situ observation revealed that the growth of twins is apparent during plastic bending deformation. EBSD analysis suggested that twinning behavior obey Schmid's law even in the polycrystal.
一般社団法人日本機械学会の論文
2011-07-16