A5074832809- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Additive Manufacturing and 3D Printing Technologies
- High-Temperature Coating Behaviors
- Magnetism in coordination complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Materials Characterization Techniques
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Lanthanide and Transition Metal Complexes
- High Temperature Alloys and Creep
- Welding Techniques and Residual Stresses
- Manufacturing Process and Optimization
- Metallurgy and Material Science
- Metal complexes synthesis and properties
- Injection Molding Process and Properties
- Aluminum Alloy Microstructure Properties
- Advanced machining processes and optimization
- Laser Material Processing Techniques
- Boron and Carbon Nanomaterials Research
- Radioactive element chemistry and processing
- Advanced materials and composites
- Semiconductor materials and devices
- Chemical Synthesis and Characterization
- Fullerene Chemistry and Applications
Institute for Innovative Process Engineering
2018-2024
Neue Materialien Bayreuth GmbH
2018-2024
University of Bayreuth
2012-2016
Mutah University
2011-2014
The most commonly investigated high entropy alloy, AlCoCrCuFeNi, has been chosen for optimization of its microstructural and mechanical properties by means compositional changes heat treatments. Among the different available paths, decrease segregating element Cu, increase oxidation protective elements Al Cr approach towards a γ-γ′ microstructure like in Ni-based superalloys have probed compared. Microscopical observations made every step. Vickers microhardness measurements and/or...
Abstract Oxidation behavior of the compositionally complex alloys (high‐entropy alloys) Al 8 Co 17 Cr Cu Fe Ni 33 (fcc‐alloy), 23 15 (bcc‐alloy), and (reference‐alloy) at elevated temperatures in air is investigated. The microstructures oxide scales substrates are analyzed using scanning electron microscopy X‐ray diffraction. All oxidized follow a parabolic kinetic law with low mass change per surface area 800 °C. alloy follows sub‐parabolic 1 000 °C exhibits good oxidation resistance both...
Compositionally complex alloys, or high entropy are good candidates for applications at higher temperatures in gas turbines. After their introduction, the equiatomic Al17Co17Cr17Cu17Fe17Ni17 (at.%) served as a starting material and long optimization road finally led to recently optimized Al10Co25Cr8Fe15Ni36Ti6 alloy, which shows promising mechanical properties. Investigations of as-cast state after different heat treatments focus on evolution microstructure provide an overview some The...
To accelerate the industrialization of metal additive manufacturing (AM), especially for powder-bed-based processes, there is a huge demand to develop alternative powder methods producing highquality powder. In this work, 17-4PH stainless steel was produced using novel gas atomization method based on arc spraying process. The morphology powder, as well mechanical properties printed specimens SLM, were characterized and tested. obtained results compared with commercial its SLM specimens....
The copper β-diketonate complex [Cu(tba)2] (3) (tba = deprotonated of 3-benzoyl-1,1,1-trifluoroacetone) was prepared by the direct reaction Cu(OAc)2·H2O (2) (OAc O2CMe) with two equivalents H-tba (1). formation 3 monitored FT-IR and UV–Vis spectroscopy. Complex crystallized in a monoclinic space group P2(1)/n unit cell parameters 10.3719(3), b 5.65410(10), c 16.9974(2) Å, V 995.47(4) Å3, Z 2. crystal structure consists neutral sphere, wherein geometry about Cu2+ is precisely planar. spheres...
The laser melting process (DED-LB-p) is used for the production of large components due to high deposition rates. number parameters and printing strategies makes it difficult optimize this achieve optimal properties. Intensive post-processing still main obstacle widespread use process. In work, relationship between different strategies, on microstructural, tensile mechanical performance at room temperature investigated. porosity was measured in both directions. Grain orientation size were...
Directed energy deposition (DED-LB-p) is used for the production of large components due to high rates. The number process parameters and printing strategies makes it difficult optimize this achieve optimal properties. Intensive post-processing still main obstacle widespread use process. In work, influence different on microstructural tensile mechanical performance at room temperature investigated. porosity measured in both directions. grain orientation size are analyzed by EBSD. A very low...
The field-dependent magnetization M(H) of [M(tba)2·nH2O] supramolecular metal complexes and their [M(tba)2(4,4′-bipy)]n (M ˭ Ni(II), Cu(II), Zn(II); tba = deprotenated 3-benzoyl-1.1.1-triflouroacetone (H-tba); 4,4′-bipy 4,4′-bipyridine) macromolecular coordination polymers have been investigated by vibrating sample magnetometer at ambient temperature (ca. 23°C). external magnetic field H(Oe) was applied in the range 0−100 Oe. M(emu/g) equal almost to zero without an (H(Oe)) for each ion....
AbstractA vibrating sample magnetometer (VSM) has been used to study the field-dependent magnetization, M(H), of d5−d7 metal acetates [M(OAc)2.nH2O], β−diketonate complexes [M(tba)2(H2O)2] and macromolecular polymers [M(tba)2(4,4-bipy)]n (where, M = Mn(II), Fe(II), Co(II), OAc O2CCH3, tba deprotonated 3-benzoyl-1.1.1-trifluoroacetone, 4,4-bipy 4,4′-bipyridine). The magnetic field strength (H) was applied in range 0−104 Oe at ambient temperature (ca. 23°C). experimental results showed that...
The nickel-based superalloy (MAR-M247) is a non-weldable alloy with attractive high-temperature properties. However, it has not been possible to print components using classic additive manufacturing processes. Sinter-based processes enable the production of difficult and alloys. But cracking porosity in printed high. Therefore, this study, highly filled metal filaments MAR-M247 were used specimens fused filament fabrication (FFF). microstructure weight change analyzed after printing,...
Laser powder bed fusion (PBF-LB/M) is used in various industries to manufacture complex parts with high precision. For most applications, a low surface roughness of less than 1 µm required. This major challenge for additively manufactured (AM) and results cost time intensive post-processing. High porosity have negative impact on fatigue resistance. work presents aluminum pack cementation as method reduce improve resistance AM parts. An Fe-base alloy (Alloy 800H) Ni-base 699XA) are selected....