Abstract
The outcome of this study highlights the feasibility of additively manufactured bimetallic structures from refractory alloys for high-temperature applications. Using a wire-based directed energy deposition (DED) process, a bimetallic structure composed of molybdenum alloy (TZM) and niobium alloy (NbZr1) was successfully fabricated. The TZM-NbZr1 interface displayed no significant defects, such as cracks or delamination, and showed no presence of intermetallic compounds. A few pores were observed on the deposited NbZr1 side near the interface. During uniaxial tensile testing, the specimen’s failure occurred on the NbZr1 side in close proximity to the interface, resulting in an ultimate tensile strength of 249 ± 126 MPa and an elongation of less than 6 %.
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