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WAAM duplex SS tubes at FABTECH 2018

12 November 2018

A pair of Clarkson University Ph.D. students gave three presentations at the American Welding Society Annual Show during the FABTECH 2018 Conference.

They presented three talks, namely: Mass Transport in Deposited Cold Wire Arc Cladding, Modelling of Mixing and Unmixed Zones in 410 Stainless Steel/Inco 718 Dissimilar Metal Welds, and Microstructure and Mechanical Properties of WAAM Duplex Stainless Steel Tube.

One of the key areas of the research involves computational and experimental assessment of joining dissimilar alloys using welding and cladding. As a part of the Ph.D. thesis, these students study the mass transport phenomenon and its effect on mechanical properties in the dissimilar metals welding and cladding processes. Also, they focus on the thermal simulation of Wire Arc Additive Manufacturing (WAAM) process to predict the microstructure of WAAM parts.

Another student works on the minimization of residual stresses formation in the Wire Arc Additive Manufactured structures made of Duplex Stainless Steels. The mechanical and metallurgical performance of the WAAM-made structures are highly dependent on the non-uniform thermal cycles inflicted during the WAAM process, which must be accounted while manipulating the process parameters to reach the minimal residual stresses formation.

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