Utilization of partial metallurgical injection for regulation of solidification forces in fusion welding processes (A07)

在这个子项目中，压应力是通过使用低相变温度(LTT)焊缝金属的部分冶金操作来选择性地产生的。这是通过在低温下延迟马氏体相变引发的局部体积膨胀来实现的。重点是通过马氏体相变的过程控制来补偿变形，从而实现束焊过程中的目标热应变控制。为此，开发了一个模拟模型，并用于预测残余应力。

In this subproject, compressive stresses are selectively generated by partial metallurgical manipulation with Low Transformation Temperature (LTT) weld metal. This is done by local volume expansion initiated by delayed martensitic phase transformation at reduced temperature. The focus is on distortion compensation through process control of martensitic phase transformation for targeted thermal strain control in the beam welding process. For this purpose, a simulation model is developed and used to predict residual stresses.