OS0317 双晶変形を伴う最密六方晶金属の二軸圧縮塑性挙動(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)

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  • OS0317 Biaxial Compressive Plastic Behavior of Hexagonal Close-Packed Metals Including Twinning

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Uniaxial and biaxial compression tests with proportional strain paths were preformed on industrial pure titanium and AZ31 magnesium alloy, in order to investigate the plastic behavior of hexagonal close-packed metals. Those distinctive features were clarified by comparing with the results of industrial pure iron. The true stress-true strain curves of pure titanium and AZ31 alloy showed constant or increasing strain hardening ratio within a certain range of applied strain, due to deformation twinning. The work contours, namely contours of the equal expenditure of plastic work, were obtained by biaxial compressive stress-strain relations for the study of yielding behavior. The deviation of work contour plots in biaxial compression region became large with the progress of plastic deformation. This fact implies the evolution of anisotropy during biaxial compressions of hexagonal close-packed metals.

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