New Composition Based Technique for Solidification Cracking Resistance Evaluation
New Composition Based Technique for Solidification Cracking Resistance Evaluation
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DOI：
10.1007/s11661-021-06244-2
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发表时间：
2021-04
期刊：
影响因子：
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通讯作者：
R. Giorjão;Benjamin J. Sutton;A. Ramirez
中科院分区：
文献类型：
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作者：
R. Giorjão;Benjamin J. Sutton;A. Ramirez
通过数值模拟预测金属合金凝固过程中凝固裂纹的发生是避免此类缺陷的关键举措。有几种模型是广泛可用的，但是，由于所需的具体和不可访问的参数，这些模型的应用受到影响。一个简单的，基于成分的方法来排名凝固裂纹敏感性。该程序将计算热力学和计算流体动力学（CFD）联系起来，为凝固裂纹提供了一种评估工具。该方法与凝固过程中枝晶臂中的充液现象有关，而枝晶臂中的充液现象对凝固开裂现象起着关键作用。枝晶轮廓使用商业热力学软件包计算的固体分数构建。将计算结果与凝固裂纹实验数据进行了比较，表明计算结果具有较好的精度。基于组成对类似合金的凝固开裂倾向进行排序的方法能力提供了重要的新操作工具，以帮助焊接和增材制造相关领域中的合金开发。
Predicting the occurrence of solidification cracking during the solidification of metallic alloys by numerical simulation is a crucial move for avoiding such defects. Several models are widely available, however, the application of such are impacted due to the specific and not accessible parameters required. A simple, composition-based approach to rank solidification cracking susceptibility is presented. The procedure links computational thermodynamic and computational fluid dynamics (CFD) to provide an evaluation tool for solidification cracking. The method is related to the liquid filling phenomena in dendritic arms during solidification, which plays a critical role in solidification cracking phenomena. The dendritic profiles were constructed using the fraction of solid calculated by commercial thermodynamic software packages. The calculated results were compared with experimental solidification cracking data and showed satisfactory accuracy. The method capability to rank the solidification cracking propensity of similar alloys based on composition provides an important new operative tool to aid alloy development in welding and additive manufacturing related areas.