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A Coupled Thermal-Stress Model of A319 Alloy Chilled Sand Casting

机译：A319合金冷砂铸件的热-应力耦合模型

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摘要

Fatigue properties of cast parts are strongly influenced by their microstructures. One practical way to improve fatigue performance of any given alloy is to reduce the length scales of the microstructural features arising from solidification. Conventionally, solid chills are employed tp achieve this. A potential means of improving the effectiveness of chills is by incorporating water cooling. To assess the efficacy of this method, a solid and a water-cooled chill were designed and installed in bonded-sand mould packages, which were instrumented with thermocouples. A coupled thermal-stress mathematical model was developed in "ABAQUS CAE 6.13" to assess the casting/chill interface heat transfer behaviour and predict gap size. Overall, the experimental and modelling results show that this approach has the potential to improve the cast microstructure farther into casting.
机译：铸件的疲劳性能受其微观结构的强烈影响。改善任何给定合金疲劳性能的一种实用方法是减小凝固引起的微观结构特征的长度尺度。常规地，为了达到该目的，采用固态冷却器。改善冷风效果的一种潜在方法是采用水冷。为了评估该方法的有效性，设计了固体冷却剂和水冷冷却剂，并将其安装在结合砂型模具中，并用热电偶进行了测量。在“ ABAQUS CAE 6.13”中开发了一个耦合的热应力数学模型，以评估铸造/冷却界面传热行为并预测间隙尺寸。总体而言，实验和建模结果表明，这种方法具有改善铸件显微组织的潜力。

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