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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Alloy Development and Powder Manufacture for Additive Manufacturing
Presentation Title Preventing the Coarsening of Al3Sc Precipitates by the Formation of a Zr-rich Shell during Laser Metal Deposition
Author(s) Philipp Kürnsteiner, Markus Benjamin Wilms, Andreas Weisheit, Eric Aimé Jägle, Dierk Raabe
On-Site Speaker (Planned) Philipp Kürnsteiner
Abstract Scope As neighboring tracks and subsequent layers are deposited during Additive Manufacturing processes such as Laser Metal Deposition (LMD), the material experiences a cyclic reheating. The idea behind the present study is to exploit this intrinsic heat treatment (IHT) of LMD to produce parts that are already precipitation hardened after manufacturing, avoiding the need for a post heat treatment. Two hypereutectically Sc-alloyed Al alloys were studied: the commercial Al4.5Mg0.66Sc04Zr Scalmalloy® and an Al1.0Sc0.6Zr alloy. It will be shown that high number densities of Al3(Sc,Zr) precipitates in the range of 1021-3x1023m-3 can be achieved by exploiting the IHT. Different IHT conditions were analyzed by lifting out Atom Probe Tomography tips from different layers of multi-layer samples. In the Scalmalloy®, the precipitates coarsened with increasing strength of the IHT. In the Al1.0Sc0.6Zr alloy, the precipitates formed a Zr-rich shell that prevented coarsening. This enabled uniform in-situ precipitation strengthening throughout the build-height of multi-layer samples.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


Alloy Design Principles for Additive Manufacturing – Lessons from Learned from Welding Metallurgy
Alloy Design Strategies for the Adaptation of Non-weldable Compositions for Additive Manufacturing
Aluminium Alloy Design for Selective Laser Melting
Aluminium Alloy Development for Additive Manufacturing
Bridging the Gap Between Rapid Solidification and the Additive Manufacture of Novel Aluminum Alloys
Characterization of Metal Additive Manufacturing Surfaces Using Synchrotron X-ray CT and Micromechanical Modeling
Computational Design of High-performance Aluminum Alloys for Additive Manufacturing
Current Understanding and Status of Ni-base Superalloys for Additive Manufacturing: Towards Alloy Development for AM
Designing Fe-Ni-Al and Fe-Ni-Ti Maraging Steels for In-situ Precipitation Hardening during Laser Metal Deposition
Developing Powder Rheology Relationships for Characterization of Metal Powder Feedstocks Used in Additive Manufacturing
Development and Application of Techniques for Rapid Alloy Screening via Novel Bicombinatorial Approaches
Effect of Atomizing Media on Mechanical Properties of 17-4 PH Stainless Steel Additively Manufactured via Selective Laser Melting
Fabrication of Hastelloy X by Electron Beam Melting and Selective Laser Melting
High Entropy Alloys for Additive Manufacturing
Increasing Powder Yields and Quality for Additive Manufacturing by Fundamental Processing Research on Gas Atomization
Laser Engineered Net Shaping (LENS) of High Entropy Alloys
Microstructural Optimization and Design of Metallic Materials for AM
Microstructure Development in Isolated Melt Pools of Electron Beam Melted Inconel 718
Performance of PTA AM Components for Mining and Energy Applications
Preventing the Coarsening of Al3Sc Precipitates by the Formation of a Zr-rich Shell during Laser Metal Deposition
Progress toward the Use of Elemental Powders for Additive Manufacturing of Aluminum Alloys
Rapid Solidification of Cu-Sn(-Ti) Based Alloys: Towards Alloy Design for Selective Laser Melting
Relationship between Alloy Composition and Solidification Conditions
RF Plasma Powder Metallurgy: An Overview of Applications for Material Development in Additive Manufacturing
The Metalysis Process - a Flexible Distributed Manufacture Route for the Production of Novel AM Powders
Thermal Stability of Laser Sintered Nanostructured Powder

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