| Abstract Scope |
Wire Arc Additive Manufacturing (WAAM) is a direct energy deposition additive manufacturing process that uses well-established welding technology. It consists of a sequential deposition of weld passes and layers to form engineering components. The WAAM process is characterised by high heat input, high deposition rate, high surface roughness and the anisotropy of material properties.
In this project, the WAAM process has been employed to manufacture multipass, multilayer walls made using 316L Stainless Steel. An array of thermocouples on the base plate has been used to monitor the transient temperature field during the WAAM manufacturing of test specimens. The thermocouple readings are used to calibrate the thermal model, which we then used in a phase-field model capturing the solidification process and formation of weld-like microstructure. Furthermore, the same thermal model was used in the mechanical model capturing material response to the heat source, thus predicting the macroscopic distortion and residual stresses. |