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首页> 外文期刊>ISIJ international >Characterization of Shear Deformation Based on In-situ Observation of Deformation in Semi-solid Al–Cu Alloys and Water-particle Mixture
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Characterization of Shear Deformation Based on In-situ Observation of Deformation in Semi-solid Al–Cu Alloys and Water-particle Mixture

机译：基于半固态Al-Cu合金和水-颗粒混合物变形的原位观察表征剪切变形

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摘要

In-situ observation of deformation at the grain scale in semi-solid Al–Cu alloys has been carried out using synchrotron X-ray radiography. The deformed microstructure was characterized by the quantitative analysis of solid motion from the image sequences during shear in semi-solid Al–Cu alloys. The influence of solid particle shape on shear deformation was also examined by comparing with in-situ observation of deformation in water-polystyrene particle mixtures where the polystyrene particles are spherical with a diameter of 500 μ m. In both semi-solid Al–Cu alloys and water-particle mixtures, solid particles located close to the shear plane developed an increasing component perpendicular to the shear plane, and a relatively high shear strain rate and decreased solid fraction was localized in a shear domain. The shear band width in semi-solid Al–Cu alloys (~10 mean particles diameter) was approximately two times wider than that formed in water-particle mixtures due to the difference in the solid particle shape.
机译：使用同步加速器X射线射线照相术对半固态Al-Cu合金的晶粒度形变进行了现场观察。通过对半固态Al-Cu合金剪切过程中图像序列中的固体运动进行定量分析，表征了变形的微观结构。还通过与水-聚苯乙烯颗粒混合物中形变的现场观察相比较来检查固体颗粒形状对剪切变形的影响，其中聚苯乙烯颗粒是直径为500μm的球形。在半固态的Al-Cu合金和水颗粒混合物中，靠近剪切平面的固体颗粒在垂直于剪切平面的位置上都有增加的分量，并且相对较高的剪切应变率和减少的固体分数位于剪切域中。由于固态颗粒形状的不同，半固态Al-Cu合金的剪切带宽度（约10个平均粒径）大约是水颗粒混合物中形成的剪切带的两倍。

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