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首页> 外文期刊>Russian Journal of Non-Ferrous Metals >Modeling the Evolution of the Structure and Properties of Alloys for an Al-Zn-Mg System in Ageing
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Modeling the Evolution of the Structure and Properties of Alloys for an Al-Zn-Mg System in Ageing

机译：Al-Zn-Mg系合金时效过程中合金结构和性能演变的建模

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摘要

An investigation into and modeling of artificial ageing in alloys of an Al-Zn-Mg system are carried out. To determine the kinetic parameters of the dissociation of a supersaturated solid solution, methods of transmission electron microscopy, a measurement of electric resistance at heightened temperature, and differential scanning calorimetry are used. To describe the evolution of the structure in ageing, the Avrami equation and the ageing time dependence of the particle size are applied. A comparison between the computational and experimental values of particle sizes showed the sufficiently high accuracy of the model. Based on this, the yield strength for alloys of the system under consideration in the aged state was computed. The computational error was 11%, which is comparable with the error of the experimental determination of the yield strength.
机译：对Al-Zn-Mg系合金的人工时效进行了研究和建模。为了确定过饱和固溶体解离的动力学参数，使用了透射电子显微镜法，升高温度下的电阻测量和差示扫描量热法。为了描述时效时结构的演变，应用了Avrami方程和时效时间对粒度的依赖性。颗粒尺寸的计算值和实验值之间的比较表明该模型具有足够高的准确性。基于此，计算了所考虑的系统在时效状态下合金的屈服强度。计算误差为11％，与屈服强度实验确定的误差相当。

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