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首页> 外文期刊>Russian Journal of Non-Ferrous Metals >Modeling for the Structure Evolution of Alloys of the Al-Cu-Mg System during Natural Ageing
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Modeling for the Structure Evolution of Alloys of the Al-Cu-Mg System during Natural Ageing

机译:自然时效过程中Al-Cu-Mg系合金结构演变的建模

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摘要

Natural ageing in alloys of the Al-Cu and Al-Cu-Mg systems is investigated and modeled. To determine the kinetic parameters, a method for measuring the electrical resistance is applied as the basic method. With the use of the: Avrami equation in the differential form, a model for the structure evolution (changes in the volume fraction of the Guinier-Preston zones (GPZs) and the depletion of the solid solution) and the change in the yield strength for the alloys during natural ageing is constructed. In the case of the Al-Cu-Mg ternary system, two types of zones are present (the GPZ and the Guinier-Preston-Bagaryatskii zone (GPBZ)). In this case, the dissociation of the oversaturated solid solution at room temperature is described by a set of differential equations. The accuracy of the constructed model of the dependence of the yield strength on the alloy composition and the natural ageing time is 6%, which is within the error of experimental determination for this parameter.
机译:对Al-Cu和Al-Cu-Mg系合金的自然时效进行了研究和建模。为了确定动力学参数,将测量电阻的方法用作基本方法。通过使用以下形式的微分形式的Avrami方程:结构演化的模型(Guinier-Preston区的体积分数的变化和固溶体的耗竭)以及屈服强度的变化。可以制造自然时效过程中的合金。对于Al-Cu-Mg三元系,存在两种类型的区域(GPZ和Guinier-Preston-Bagaryatskii带(GPBZ))。在这种情况下,室温下过饱和固溶体的解离通过一组微分方程来描述。屈服强度对合金成分和自然时效时间的依赖性所构建模型的精度为6%,在该参数的实验确定误差范围内。

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