Abstract
Elemental metals Nb and Mo are common refractory metals, performing good properties in a high-temperature working environment. While due to their high melting points, they are hard to be manufactured. Besides, elemental metal with a single BCC phase performs onefold properties, which promotes the design of medium/high entropy refractory alloys. This paper focuses on the formability analysis of refractory metals Mo, Nb and mixed MoNbTi powder printed by SLM. It successfully demonstrated for the first time that laser metal deposition can be used to produce MoNbTi high-entropy alloy from a blend of elemental powders by in-situ alloying with the assistance of the Flow 3D app. The densities of elemental Nb, Mo and MoNbTi manufactured by the corresponding optimized printed parameters were 99.41%, 99. 13% and 97.38%, respectively. As-built MoNbTi high-entropy alloy contained FCC+BCC double phase. The FCC phase is diffusively precipitated in the BCC phase, and the boundary is moist.
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