Abstract Scope |
The composition-process-structure-property relationship in dissimilar alloys is critical for successful manufacturing. In this work, an attempt was made to understand such a relationship for wire-arc additive manufacturing (WAAM) of dissimilar alloy from P91 steel to Inconel 740H superalloy. More than 400 sets of data, including composition, microstructure, hardness, ductility, and porosity, were obtained along the composition gradient introduced by WAAM. The CALPHAD (Calculations of Phase Diagrams) method was used to predict the additional features, such as freezing range, phase fractions, and heat capacity, to enrich the experimental datasets. Finally, a statistical approach was applied to estimate the variation in hardness, porosity, and ductility as a function of the composition gradient. The proposed method shows an advantage in generating large datasets of a large alloy composition space and provides an effective way for revealing the composition-process-structure-property relationship. |