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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Pioneers in Additive Manufacturing
Presentation Title AFRL Contributions to Additive Manufacturing of Titanium, ca 2000
Author(s) Pamela Kobryn, Lee Semiatin
On-Site Speaker (Planned) Pamela Kobryn
Abstract Scope From 1998-2003, the Air Force Research Laboratory performed extensive R&D on powder deposition of Ti-6Al-4V using both low-power (LENS™) and high-power (LAM™) systems. Major areas of research focused on the effect of process variables on microstructure evolution and properties and the application of such AM techniques to fabricate preforms for forging. In the former area, the effects of laser power, scan rate, and substrate texture on the microstructure and texture of the build were established. Microstructure observations were interpreted within the context of a solidification (G-vs-R) map previously developed at AFRL for macro-solidification processes. Mechanical properties were found to be comparable to those of castings; noticeable improvements were obtained when post-deposition HIP was used. In the forging area, it was shown that the breakdown of the transformed microstructure in AM preforms of Ti-6Al-4V followed trends similar to those for conventional ingot-metallurgy products.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3DP Retrospective: Do Inventors Know What They Are Doing?
A-94: 3D Additive Manufacturing of Metals at Micro/Nanoscale Using Localized Electrodeposition
A-95: Direct Metal Write Additive Manufacturing of Rare-earth Modified Aluminum Alloys Using Electromagnetic Heating Systems
A-96: FEM Modeling of Steel Additive Manufacturing Using Laser Hot-Wire Process
A-97: Microstructure Evolution and Galling Properties of Hard Facing Coatings Deposited Using Laser Directed Energy Deposition
A-98: Novel High Temperature Drop on Demand Liquid Metal-jetting for the Production of Complex 2D and 3D objects
A History of Additive Manufacturing
AFRL Contributions to Additive Manufacturing of Titanium, ca 2000
Assent and Decline of LOM Technology
Directed Light Fabrication: A Near-Net Shape Process using Laser Assisted Metal Deposition
Early Developments of AM within the UK
Laser Deposition of Metallic Powders
Laser Engineered Net Shaping - AM Metal Parts with Exceptional Material Properties
Making Things Bit-by-byte: Opportunity in a Fortuitous Convergence of Technologies
Pioneering International Consensus
Process Fundamentals for Selective Laser Melting: Power Ratio, Melting, Porosity, and Build Properties

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