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Improvement of both elongation and strength of magnesium alloy consisting long period stacking ordered phase by hot-extrusion

長周期積層規則相を有するマグネシウム合金の熱間押出しによる伸びと強度の改善

Harjo, S.   ; 相澤 一也  ; Gong, W.   ; 山崎 倫昭*; 川崎 卓郎   

Harjo, S.; Aizawa, Kazuya; Gong, W.; Yamasaki, Michiaki*; Kawasaki, Takuro

The elongation of an LPSO type Mg alloy consisting 25 vol% of LPSO phase was found to increase without sacrificing the tensile strength, when the extrusion ratio or the equivalent strain of the hot-extrusion became higher. This phenomenon is very interesting, considering that the improvements of elongation and of tensile strength due thermo-mechanical processes are usually contradictory properties. In this study, monitoring deformation behavior of the $$alpha$$Mg and LPSO phases in hot-extruded LPSO type Mg alloys consisting 25 vol% of LPSO phase by in situ neutron diffraction was carried out to elucidate the reason of the improvement of both elongation and strength by hot-extrusion with high extrusion ratio.

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