|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advances in Additive Manufacturing of Titanium and Titanium Based Alloys
||Intrinsic Heat Treatment of Titanium Alloys during Selective Laser Melting
||Pere Barriobero-Vila, Joachim Gussone, Jan Haubrich, Stefanie Sandl÷bes, Julio Cesar Da Silva, Peter Cloetens, Norbert Schell, Guillermo Requena
|On-Site Speaker (Planned)
Selective laser melting (SLM) is a laser additive manufacturing method allowing near net-shape manufacturing of metallic components with high resource-efficiency and promising cost savings for titanium alloys. For α+β titanium alloys, the sharp cycles of steep heating and cooling rates associated with the SLM process usually promotes formation of brittle microstructures containing martensite that render poor ductility, poor fatigue resistance and are unsuitable for structural applications. The analysis of the intrinsic heat treatment applied during selective laser melting of titanium powder alloys using scanning strategies that combine porosity-optimized parameters is presented. For Ti-6Al-4V, extensive martensite decomposition leading to lamellar α+β microstructures can be formed along the building direction, where the β matrix consists in nano-thin interconnected 3D networks resolved by synchrotron X-ray computed tomography. The degree of stabilization of this phase is indicated by lattice parameter variations obtained from bulk analysis using high energy synchrotron X-ray diffraction.
||Planned: Supplemental Proceedings volume