| Abstract Scope |
Additive Manufacturing has enabled a design revolution enabling complex geometry not possible via traditional manufacturing. An emerging AM technology is multi-material printing where multiple powders and/or wires are fed into the meltpool enabling chemistry, microstructure, and properties to be functionally graded strength throughout a component. Ongoing effort has focused on the deposition of crack-free microstructures, hardness, and low-level properties. If Multi-material AM (MMAM) is to be moved towards application in design, there is need to develop a “Spatial Materials Design” philosophy, where both geometric and material topology are considered.
In this study, MMAM is applied to 316L to IN718 interfaces, manufactured by directed energy deposition AM. Notch strengthening by MMAM is demonstrated at room and elevated temperature showing a 40 and 100% increase in strength when compared to monolithic 316L. Strain and microstructure are evaluated using advanced techniques. |