Abstract
Additive manufacturing (AM) has shown great potential in recent times to fabricate near net-shape 3D products from various materials systems including titanium (Ti) and Ti alloys. Here we present a comprehensive discussion on AM of Ti alloys outlining the microstructure and texture evolution plus defect formation and their subsequent effect over mechanical properties. We take a specific example of Laser-Engineered Net Shaping (LENS™) processed Ti-6Al-4V alloy and discuss how microstructure, texture, defects, and mechanical properties are connected in this system. In AM (LENS™) processing, graded microstructure forms in as-deposited bulk specimen for two-phase (α+β) alloys, for example, Ti-6Al-4V in terms of prior β grain morphology, different phase formation (α' -martensite, lamellar α, plus grain boundary α phases, etc.) plus their distribution depending on the deposition parameters. In addition, the microstructure exhibits spheroidization of α phase in as-deposited condition. The AM processing parameters also leads to strong macro- and microtexture evolution, macrozone elimination, and texture transition at the interface of various heat-affected zones. AM leads to various defect formations like porosity and residual stress within the bulk specimen. As a concomitant effect, mechanical properties along different orientations vary in coordination with the microstructure and texture evolution plus defect distribution with respect to the build direction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Additive Manufacturing: A Tool for Industrial Revolution 4.0
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.