|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Forming of Components - Tailoring Specific Material Properties in Low Volume Production
||Microstructure Evolution, Tensile and Dynamic Properties, and Computational Modeling in Ti-6Al-4V and Inconel 718 Alloys Manufactured by Laser Engineered Net Shaping
||Yuwei Zhai, Diana A Lados
|On-Site Speaker (Planned)
Laser Engineered Net Shaping (LENS) is a powder-based Additive Manufacturing process able to fabricate fully dense metallic parts. Applying it to structural aerospace components and repair requires a fundamental understanding of both the microstructures and static and dynamic properties of the LENS-fabricated materials. In this study, Ti-6Al-4V and Inconel 718 alloys were fabricated using two laser power levels for each alloy, and were investigated in both as-fabricated and heat treated conditions. First, the effects of processing parameters and heat treatment on microstructure and tensile properties were systematically studied. Computational modeling tools have been developed to evaluate the thermal histories of the depositions and uniquely predict their resulting microstructures. Further, room temperature fatigue crack growth tests (R=0.1,0.8) were performed in different orientations with respect to the deposition direction, in order to establish the crack growth mechanisms at the microstructural scale of the alloys. The results will be compared and critically discussed.
||Planned: A print-only volume