Charles Murgau Corinne, Lundbäck Andreas, Åkerfeldt Pia, Pederson Robert
Department of Engineering Science, University West, 46129 Trollhättan, Sweden.
Division of Mechanics of Solid Materials, Luleå University of Technology, 97181 Luleå, Sweden.
Materials (Basel). 2019 Oct 28;12(21):3534. doi: 10.3390/ma12213534.
In the present study, the gas tungsten arc welding wire feed additive manufacturing process is simulated and its final microstructure predicted by microstructural modelling, which is validated by microstructural characterization. The Finite Element Method is used to solve the temperature field and microstructural evolution during a gas tungsten arc welding wire feed additive manufacturing process. The microstructure of titanium alloy Ti-6Al-4V is computed based on the temperature evolution in a density-based approach and coupled to a model that predicts the thickness of the α lath morphology. The work presented herein includes the first coupling of the process simulation and microstructural modelling, which have been studied separately in previous work by the authors. In addition, the results from simulations are presented and validated with qualitative and quantitative microstructural analyses. The coupling of the process simulation and microstructural modeling indicate promising results, since the microstructural analysis shows good agreement with the predicted alpha lath size.
在本研究中，对气体钨极电弧焊送丝增材制造工艺进行了模拟，并通过微观结构建模预测了其最终微观结构，该模型通过微观结构表征得到了验证。采用有限元方法求解气体钨极电弧焊送丝增材制造过程中的温度场和微观结构演变。基于密度法，根据温度演变计算钛合金Ti-6Al-4V的微观结构，并将其与预测α板条形态厚度的模型相结合。本文所展示的工作包括工艺模拟和微观结构建模的首次耦合，作者在之前的工作中分别对它们进行了研究。此外，还给出了模拟结果，并通过定性和定量的微观结构分析进行了验证。工艺模拟和微观结构建模的耦合显示出了有前景的结果，因为微观结构分析与预测的α板条尺寸显示出良好的一致性。
