Modeling of the Thermal Field in Dissimilar Alloy Ultrasonic Welding
Modeling of the Thermal Field in Dissimilar Alloy Ultrasonic Welding
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DOI：
10.1007/s11665-014-1342-8
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发表时间：
2015-02-01
影响因子：
2.3
通讯作者：
Robson, J.
中科院分区：
文献类型：
--
作者：
Jedrasiak, P.;Shercliff, H. R.;Robson, J.
建立了铝合金AA6111与镁合金AZ31和低碳钢DC 04大功率超声焊接温度场的有限元模型。实验热电偶和其他证据用于推断工件的热输入的大小和分布，作为时间的函数，对于每种焊接的材料组合。由此产生的温度历史被用来预测在铝镁焊缝界面处的金属间化合物相的生长。微观结构模型成功地预测了金属间化合物层的厚度，但结果对温度的敏感性被证明。
This paper describes a finite element model for predicting the temperature field in high power ultrasonic welding aluminum AA6111 to two dissimilar alloys, magnesium AZ31, and low carbon steel DC04. Experimental thermocouple and other evidence are used to infer the magnitude and distribution of the heat input to the workpiece, as a function of time, for each of the material combinations welded. The resulting temperature histories are used to predict the growth of intermetallic phases at the interface in Al-Mg welds. The microstructural model successfully predicts the thickness of the intermetallic layer, but the sensitivity of the results to temperature is demonstrated.