Title: The Effect of short-range order on the viscosity and crystallization of Al-Mg melts Show Chinese title

Title: 短程有序对Al-Mg熔体粘度和结晶的影响

Abstract: 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. Show Chinese abstract

Abstract: 在本工作中，使用粘度测量和热分析的方法，研究了Mg含量从2.5至95 at.%的Al-Mg熔体的过冷粘度值的浓度变化。 结果表明，粘度的温度依赖性可以用指数依赖关系很好地描述。 粘度的浓度依赖性不是单调的，并反映了液相中化学短程有序的变化。 Al-Mg熔体的过冷度的浓度依赖性取决于固态相形成的方式，同时也反映了液相中化学短程有序在20和80 at.% Mg时最显著的变化。Al-Mg合金在浓度范围：0-10、40-50和90-100 at.% Mg时容易发生非平衡结晶，形成准共晶以及无中间金属间相的凝固。