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

在这个子项目中，对低温（LTT）焊接金属进行部分冶金操作，选择性地产生压应力。这是通过在降低温度下由延迟马氏体相变引起的局部体积膨胀来实现的。重点研究了通过马氏体相变过程控制进行变形补偿，以实现焊接过程中热应变的定向控制。为此，建立了一个模拟模型，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.