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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing: Alloy Design to Develop New Feedstock Materials
Presentation Title Opportunities to Improve the Mechanical Properties of Titanium Alloys Produced by Laser Powder Bed Fusion
Author(s) Marco Simonelli, Graham McCartney, Nesma Aboulkhair, Yau Yau Tse, Adam Clare, Richard Hague
On-Site Speaker (Planned) Marco Simonelli
Abstract Scope This talk presents the opportunities that laser powder-bed fusion (L-PBF) offers for the design and development of novel superior titanium alloys. From a detailed study of the solidification path of Ti-6Al-4V, our exemplar material, strategies to increase strength/ductility and address mechanical anisotropy in Ti alloys are proposed. Firstly, (i) the orientation relationship that links the low and high temperature phases (α and β, respectively) and (ii) the crystallographic defects introduced by L-PBF are utilised for prior-β grain refinement through epitaxial recrystallisation. The recrystallisation is characterised by high-temperature EBSD to inform on the early nucleation and growth of the β phase. The alloy design strategy used to develop a novel quaternary alloy Ti-6Al-4V-Fe with heat treatable metastable microstructure for increase in both strength and ductility is then presented. The merits of the design strategy and future outlooks and informed by high-temperature synchrotron X-ray diffraction, EBSD and TEM studies and mechanical testing.


3D Characterization of Cracks Formed in “Weldable” AA6061 and Implications for Alloy Design
Accidental Alloy Development: In-situ Evolution of AM Powder and Opportunities for New Material Synthesis Pathways
An Interdisciplinary Approach for Alloy Design for Additive Manufacturing
Application of Taguchi, Response Surface, and Artificial Neural Networks for Rapid Optimization of Direct Metal Laser Sintering Process
CALPHAD Informed Design of Rare-earth Containing Alloys for Additive Manufacturing
Characterization of Spatter with Organized Features in Laser Powder Bed Fusion
Development of Oxidation Resistant Multi-Principle Element Alloys Applied with Additive Manufacturing
High-Throughput Accelerated Alloy Development
Laser Additive Manufacturing of Nanocomposite Powders
Mechanical Alloying of Feedstock Powder for Additive Manufacturing by Selective Laser Melting: Aluminum Alloy Matrix Composites
Micro-crack Mitigation by Alloy Modification in the Additively Manufactured Ni-base Superalloy CM247LC
Microstructure and Property Variability in DED Inconel 718 as a Function of Build Rate
Opportunities to Improve the Mechanical Properties of Titanium Alloys Produced by Laser Powder Bed Fusion
Optimization of Nitrogen-Atomized 17-4 Stainless Steel Feedstock for AM Processing
Processing of Y2O3-modified Nickel Superalloy by Selective Laser Melting.
Residual Stress Mitigation of Additive Manufactured Stainless Steel 316L Components through the Directed Energy Deposition Inclusion of TiC Nanoparticles
Sensitivity Analysis and Composition Design for Metal Additive Manufacturing Using CALPHAD-based ICME Framework

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