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首页> 外文期刊>Journal of Materials Engineering and Performance >Modeling Precipitation Kinetics During Heat Treatment with Calphad-Based Tools
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Modeling Precipitation Kinetics During Heat Treatment with Calphad-Based Tools

机译：使用基于Calphad的工具对热处理过程中的沉淀动力学进行建模

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Sophisticated precipitation reaction models combined with well-developed CALPHAD databases provide an efficient way to tailor precipitate microstructures that maximize strengthening via the optimization of alloy chemistries and heat treatment schedules. The success of the CALPHAD approach relies on the capability to provide fundamental phase equilibrium and phase transformation information in materials of industrial relevance taking into consideration composition and temperature variation. The newly developed TC-PRISMA program is described. The effect of growth modes, alloy chemistries, and cooling profiles on the formation of multimodal microstructures has been examined in order to understand the underlying thermodynamics and kinetics. Practical issues that are critical to the accuracy and applicability of the current simulations, such as modifications that overcome mean field approximations, compatibility between CALPHAD databases, and selections of key parameters (particularly interfacial energy and nucleation site densities), are also addressed.
机译：先进的沉淀反应模型与完善的CALPHAD数据库相结合，为定制沉淀微结构提供了有效的方法，该结构通过优化合金化学和热处理时间表来最大限度地增强强度。 CALPHAD方法的成功取决于能否在考虑到成分和温度变化的情况下，在与工业相关的材料中提供基本的相平衡和相变信息。描述了新开发的TC-PRISMA程序。为了了解潜在的热力学和动力学，已经研究了生长模式，合金化学性质和冷却曲线对多峰微结构形成的影响。还解决了对当前模拟的准确性和适用性至关重要的实际问题，例如克服平均场近似值的修改，CALPHAD数据库之间的兼容性以及关键参数（尤其是界面能和成核位点密度）的选择。

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