A5074790347- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Additive Manufacturing and 3D Printing Technologies
- Advanced materials and composites
- Laser-Ablation Synthesis of Nanoparticles
- Aluminum Alloy Microstructure Properties
- Advanced Materials Characterization Techniques
- Laser and Thermal Forming Techniques
- Metal and Thin Film Mechanics
- Intermetallics and Advanced Alloy Properties
- Laser-induced spectroscopy and plasma
- Nuclear Materials and Properties
- Metal Alloys Wear and Properties
- High-Temperature Coating Behaviors
- Laser Material Processing Techniques
- Material Properties and Applications
- High Temperature Alloys and Creep
- Manufacturing Process and Optimization
- Fusion materials and technologies
- Diamond and Carbon-based Materials Research
- Advanced Semiconductor Detectors and Materials
- Metallurgy and Cultural Artifacts
- Microstructure and Mechanical Properties of Steels
- Welding Techniques and Residual Stresses
- Aluminum Alloys Composites Properties
University of Wuppertal
2022-2024
Fraunhofer Institute for Laser Technology
2016-2023
RWTH Aachen University
2017-2020
High-manganese steels (HMnS) are alloys with outstanding mechanical properties, but their application is inhibited by inherent limitations in conventional processing. Additive manufacturing (AM) provides an alternative to make use of the unique properties HMnS due strongly differing processing conditions. However, no established methodology exists currently tailor metallic specifically for AM. Therefore, a combining theoretical and experimental screening was used design suited First,...
We present a novel route for the adsorption of pulsed laser-dispersed nanoparticles onto metal powders in aqueous solution without using any binders or surfactants. By electrostatic interaction, we deposit Y2O3 iron–chromium based and obtain high dispersion nano-sized particles on metallic powders. Within additively manufactured component, show that particle spacing oxide inclusion can be adjusted by initial mass fraction adsorbed micropowder. Thus, our procedure constitutes robust additive...
A new route for the synthesis of powder composites suitable processing with laser additive manufacturing is demonstrated. The composites, consisting micrometer-sized stainless steel powder, homogenously decorated nano-scaled Y2O3 particles, are manufactured by colloids and electrostatic deposition. Consolidated metal deposition selective melting, resulting specimens show superior mechanical properties at elevated temperatures, caused nano-sized, distributed dispersoids.
Abstract In this work, we demonstrate the feasibility of manufacturing an iron-based oxide-dispersion-strengthened (ODS) PM2000 composite material with chemical composition Fe20Cr4.5Al0.5Ti + 0.5Y 2 O 3 (in wt.%) via advanced directed energy deposition (DED) process high-speed laser cladding (HSLC). The characteristic high solidification rates HSLC processes allow successful dispersion nano-scaled yttrium-based oxides in ferritic stainless steel matrix. effective suppression nano-particle...
The field of additive manufacturing (AM), and especially laser powder‐bed fusion (LPBF), is constantly growing. Process windows for a large variety materials are already developed. Nevertheless, some still difficult to manufacture with LPBF. One these the tungsten carbide/cobalt‐based hard metal (WC–Co), which conventionally produced by powder metallurgy including liquid‐phase sintering. Most approaches WC–Co LPBF show high porosity, undesirable phases in microstructure, inhomogeneous...
Laser additive manufacturing (LAM) offers high flexibility in the production of customized and geometrically complex parts. The technique receives great interest from industry academia but faces substantial challenges regarding processability insufficient mechanical properties LAM-produced material. One reason is that currently mainly conventional alloys are being used LAM, which were developed for different processes such as casting. Since these not optimized specific process conditions...
In this contribution, the effect of nanoparticle additivation on microstructure and microhardness oxide dispersion strengthened steels (ODS) manufactured by laser powder bed fusion (L-PBF) directed energy deposition (DED) additive manufacturing (AM) is studied. The composites are made micrometer-sized iron-chromium-alloy based which homogenously decorated with Y2O3 nanoparticles synthesized pulsed fragmentation in water. Consolidated L-PBF DED, an enhanced AM-built ODS sample found. This...
Journal Article In-process Precipitation During Laser Additive Manufacturing Investigated by Atom Probe Tomography Get access Philipp Kürnsteiner, Kürnsteiner Department Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany Search for other works this author on: Oxford Academic Google Scholar Markus Benjamin Wilms, Wilms Fraunhofer Institute Technology ILT, Aachen, Andreas Weisheit, Weisheit Pere Barriobero-Vila, Barriobero-Vila of...
Copper is a key material for cooling of thermally stressed components in modern aerospace propulsion systems, due to its high thermal conductivity. The use copper materials such applications requires both strength and stability at temperatures, which can be achieved by the concept oxide dispersion strengthening. In present work, we demonstrate reinforcement two highly conductive precipitation-strengthened Cu-Cr-Nb alloys using laser additive manufacturing. Gas-atomized Cu-3.3Cr-0.5Nb...
Strong efforts are made internationally to optimize the process control of laser additive manufacturing processes. For this purpose, advanced detectors and monitoring software being developed quality production. However, commercial suppliers metal powders part manufacturers essentially focused on well-established materials. This article demonstrates potential optimized control. Furthermore, we outline development a new high temperature structural steel, tailored best utilize advantages...
Laser metal deposition (LMD) was used to in-situ alloy a crack-free Al0.6CoCrFeNi compositionally complex (CCA) with 3 at.% Ti and 0.25 C additions on an initially ferritic H10 tool steel from elemental powder blend. After LMD, the material annealed at 900 °C for 30 min induce martensitic hardening in substrate. The CCA both as-deposited states exhibited lamellar microstructure consisting of four phases: matrix interwoven disordered ordered body-centered cubic phases, titanium carbides...
Abstract Oxide dispersion-strengthened (ODS) steel is a sought-after composite material known for its high demand in high-temperature and corrosive environments. Achieving the desired ODS properties requires specific conditions size nanoparticles (NP) distribution printed part. Laser ablation liquid (LAL) enables precise NP adjustment. At same time, dynamic melt pool solidification Powder Bed Fusion (PBF-LB/M) process complements this by creating favorable successful processing. In study,...
Abstract Multi material additive manufacturing (MM-AM) is an attractive approach to combine the geometric flexibility in particular of powder bed based AM processes with functional integration. A major limitation multi-material laser fusion (MM-LPBF) approaches risk contamination. In present study, implementation a concept for multi parts demonstrated. new type device contructed, and process tested fundamentally gradually by experimental means. Aspects investigated include machine...