OS0310 引張および圧縮におけるマグネシウム単結晶の変形挙動(非立方晶型金属材料の変形現象とそのモデル化,オーガナイズドセッション)

概要

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It is important to research activation of the slip systems in magnesium crystals to understand deformation behavior of magnesium. In this study, pure magnesium single crystals were stretched in [112^^-0] and compressed in [0001] in the range of 77K to 573K. to investigate the deformation behavior by non-basal slip. The active slip system was investigated by the observation of slip bands. In both case, {112^^-2} <1^^-1^^-23> second order pyramidal slip is activated in all magnesium and magnesium alloy single crystals, and its yield stress shows anomalous temperature dependence in the range from 77K to 293 K, however, the yields stress decreased rapidly with increasing temperature above 293 K. [112^^-0] compression and [0001] tensile test was also carried. {101^^-2} twin occurred at 5-10MPa in both case. Deformation behavior of magnesium single crystal strongly depends on the loading orientation.
一般社団法人日本機械学会の論文
2009-07-24