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首页> 外文会议>International Symposium on Eco-Materials Processing amp; Design; 20060108-11; Chengdu(CN) >Effect of Electromagnetic Stirring on Orientation Distribution Function of Primary Solid Phase of Al-Cu Alloy
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Effect of Electromagnetic Stirring on Orientation Distribution Function of Primary Solid Phase of Al-Cu Alloy

机译：电磁搅拌对Al-Cu合金初生固相取向分布函数的影响

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摘要

In this study, the orientation distribution function (ODF), which can be calculated from the pole figure data, was examined and tried in order to characterize the bulky morphology of primary solid phase of semi-solid slurry instead of erroneous 2D observation for the characterization of microstructure. Al-15wt%Cu alloys were electromagnetically stirred during the continuous cooling in the specially designed electromagnetic (EM) stirrer, which generates a rotating magnetic field, and the samples were prepared by interrupt-quenching semi-solid slurry at a solid-liquid region. Owing to EM stirring the temperature distribution of melt inside a crucible became uniformed compared with the case of unstirred melt and the normal dendritic structure was transformed to one consisting of the spherical and rosette shaped primary solid phase due to the fragmentation of the dendrites. Also by the effect of EM stirring the < 110 > //ND texture were still strongly developed, but the advancement of the orientations to lead < 110 > //ND texture became weaker, and the orientations to lead < 100 > //ND and < 111 > //ND texture were more strongly advanced in comparison with the unstirred case. Therefore the advancement of the texture became weak and so the tendency to random orientation was appeared due to the EM stirring. Therefore it was thought that the extent of random orientation could be valued for the characterization of bulky morphology of primary solid phase of semi-solid slurry.
机译：在这项研究中，研究并尝试了根据极图数据计算出的取向分布函数（ODF），以表征半固态浆料的初级固相的庞大形态，而不是错误的二维观察来表征的微观结构。在专门设计的电磁（EM）搅拌器中，在连续冷却期间将Al-15wt％Cu合金进行电磁搅拌，产生旋转磁场，并通过在固液区中对半固态浆料进行淬火来制备样品。与未搅拌的熔体相比，由于进行了EM搅拌，坩埚内的熔体的温度分布变得均匀，并且由于树枝状晶体的碎裂，正常的树枝状结构转变成由球形和玫瑰形初级固相组成的一种。同样，通过EM搅拌的作用，<110> // ND纹理仍然强烈发展，但是导致<110> // ND纹理的取向的进展变得较弱，而导致<100> // ND纹理的取向和<111> //与未搅拌的情况相比，ND纹理的作用更强。因此，质地的发展变弱，并且由于EM搅拌而出现了随机取向的趋势。因此，认为可以通过随机取向的程度来表征半固态浆料的初级固相的大体积形态。

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