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arXiv 2212.04404cond-mat.mtrl-sciphysics.chem-phphysics.comp-ph
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短程有序对Al-Mg熔体粘度和结晶的影响

The Effect of short-range order on the viscosity and crystallization of Al-Mg melts

Elizaveta A. Batalova, Larisa V. Kamaeva, Nikolay M. Chtchelkatchev

摘要:

本文用粘度法和热分析法研究了Mg含量在2.5~95at. %范围内的Al-Mg熔体的过冷粘度随浓度的变化规律进行了研究结果表明,粘度的温度依赖性很好地描述了指数依赖。粘度的浓度依赖性不是单调的,并且反映了液相中化学短程有序的变化。Al-Mg熔体过冷度的浓度依赖性由凝固过程中形成的固相类型决定,也反映了液相中化学短程有序在20和80at. %时最显著的变化mg.浓度范围为0 - 10、40 - 50和90 - 100原子%的铝镁合金镁合金易发生非平衡结晶,形成准共晶,凝固时无中间金属间相。

英文摘要:

In this work, using the methods of viscosimetry and thermal analysis, the concentration changes in the values of the supercooling viscosity of Al-Mg melts with Mg content from 2.5 to 95 at.% are studied. It is shown that the temperature dependences of viscosity are well described by an exponential dependence. The concentration dependence of viscosity is not monotonous and reflects a change in the chemical short-range order in the liquid phase. The concentration dependence of supercooling of Al-Mg melts is determined by the type of solid phase formed during solidification, and also reflects the most significant changes in the chemical short-range order in the liquid phase at 20 and 80 at.% Mg. Al-Mg alloys in the concentration ranges: 0-10, 40-50 and 90-100 at.% Mg are prone to non-equilibrium crystallization, the formation of quasi-eutectics and solidification without intermediate intermetallic phases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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