|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||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 Lados, Eric Brown, Greg Vigilante, Robert Warren
|On-Site Speaker (Planned)
Laser Engineered Net Shaping (LENS) is a directed energy deposition process able to fabricate fully dense metallic parts. Applying LENS to structural components and repair requires a fundamental understanding of the microstructure, static and dynamic properties, and damage mechanisms of the LENS-fabricated materials. In this study, Ti-6Al-4V and Inconel 718 alloys were deposited using two laser power levels for each material, and investigated in both as-fabricated and heat treated conditions. The effects of processing parameters and heat treatments on microstructure and room temperature tensile and fatigue crack growth (FCG) properties were systematically studied. FCG tests (R=0.1, 0.8) were performed in different orientations with respect to the deposition direction, in order to establish the FCG mechanisms at the microstructural scale of the alloys at different growth stages, and further correlate them to the processing conditions using thermal simulations results. The findings will be compared and critically discussed for processing-microstructure-properties optimization.
||Planned: Supplemental Proceedings volume