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Product Code: ICA11_1401

Characterization of Micro/Macrostructure of Laser Cladded Inconel 718 with Increased Deposition Rates As Related to the Mechanical Properties
Johannes Witzel, Chair for Laser Technology, RWTH Aachen University; Aachen Germany
Salay Stannard, Joining Technologies, Inc.; East Granby CT USA
Andres Gasser, Fraunhofer Institute for Laser Technology; Aachen Germany
Ingomar Kelbassa, Fraunhofer Institute for Laser Technology, Chair for Laser Technology, RWTH Aachen University; Aachen Germany
Presented at ICALEO 2011

Currently, high value Class 1 jet engine components such as BLISKs (Blade Integrated DiSKs) are manufactured by time and cost-prohibitive conventional techniques, such as five-axis milling, linear friction welding and electro chemical machining. This project within the Fraunhofer Cluster of Innovation TurPro qualifies the LMD process as a new green manufacturing method for nickel and titanium alloy-based BLISKs. Quality assurance and predictable material properties remain a major concern when aiming for a process certification of additive manufacturing of BLISK blades. This paper presents the results of a microstructure investigation of laser cladded IN 718 using increased deposition rates of up to 7000 mm3/min. Presented are the ternary relations between process parameters, dendrite arm spacing and resulting mechanical properties with respect to niobium segregation.

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