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半固态AlSi6Mg2铝合金循环剪切变形下的触变行为 被引量:1

Thixotropic behavior of a semi-solid AlSi6Mg2 aluminum alloy under cyclic shear deformation
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摘要 在Couette型同轴圆桶流变仪上,采用滞后环工艺研究了半固态AlSi6Mg2铝合金浆料的触变行为.实验结果表明半固态AlSi6Mg2铝合金浆料在循环剪切变形下,静置时间越长、剪切速率到达最大值所用时间越短、固相分数越大、最大剪切速率越大,则合金浆料τ-γ.滞后环所包围区域面积越大,合金浆料的触变性越强. The hysteresis loop technique was applied to investigate the thixotropic behavior of semi-solid AlSi6Mg2 aluminum alloy slurries using a Couette type viscometer. The experimental results show that, under cyclic shear deformation, the thixotropy degree of semi-solid AlSi6Mg2 alloy increases with increasing resting time, solid fraction, maximum shear rate, and decreasing time to reach the maximum shear rate.
出处 《北京科技大学学报》 EI CAS CSCD 北大核心 2007年第3期306-309,共4页 Journal of University of Science and Technology Beijing
基金 国家高技术研究发展项目(No.2006AA03Z115) 国家重点基础研究规划项目(No.2006CB605203) 国家自然科学基金资助项目(No.50374012)
关键词 铝合金 半固态 触变性 循环变形 剪切变形 aluminum alloy semi-solid thixotropic behavior cyclic deformation shear deformation
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