鉄と鋼
Online ISSN : 1883-2954
Print ISSN : 0021-1575
論文
固液共存状態Al-Cu合金と水‐粒子混合体のせん断変形過程のその場観察に基づいたせん断変形組織の特徴
柳楽 知也横田 大和森田 周吾安田 秀幸吉矢 真人C.M. Gourlay杉山 明上杉 健太朗梅谷 啓二
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2013 年 99 巻 2 号 p. 141-148

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In-situ observation of deformation in semi-solid alloys at the grain scale has been carried out using X-ray radiography. This paper characterizes the deformed microstructure in the semi-solid state by a quantitative analysis of solid motion from the image sequences obtained by the in-situ experiment on semi-solid Al-Cu alloys. A velocity of solid, a shear strain rate and a divergence of solid rate, which correspond to the change in solid fraction, were evaluated during a 0.5-1d (d: crystal size) increment of direct shear. The effect of solid morphology on the shear deformation was also examined by in-situ observation of deformation in water-polystyrene particle mixture where the polystyrene particles are spherical (shape factor~1) with diameter of 500 μm. The shear strain was localized in the vicinity of the shear domain and the localized area corresponds to the area where the solid fraction decreased both in semi-solid Al-Cu alloys and the water-particle mixture. The waterpolystyrene particle mixture showed a narrower localized area of the shear strain than that of Al-Cu alloys due to the difference in the solid shape.

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© 2013 一般社団法人 日本鉄鋼協会
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