A5006353407- Advanced Welding Techniques Analysis
- Metal Alloys Wear and Properties
- Aluminum Alloys Composites Properties
- Metal and Thin Film Mechanics
- Ion-surface interactions and analysis
- Particle accelerators and beam dynamics
- Welding Techniques and Residual Stresses
- Ultrasound and Cavitation Phenomena
- Microstructure and Mechanical Properties of Steels
- Aluminum Alloy Microstructure Properties
- Electron and X-Ray Spectroscopy Techniques
- Nuclear Physics and Applications
- Fusion materials and technologies
- Metallurgy and Material Science
- Metal Forming Simulation Techniques
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Mechanical stress and fatigue analysis
- High Temperature Alloys and Creep
- Tribology and Wear Analysis
- Erosion and Abrasive Machining
- Lubricants and Their Additives
- Nuclear Materials and Properties
- Metallurgy and Material Forming
- Additive Manufacturing Materials and Processes
University of Duisburg-Essen
2013-2024
Helmholtz-Zentrum Hereon
2015-2019
Philips (United Kingdom)
2016
Karlsruhe Institute of Technology
2011
In recent years, interest has been increasing in application of Nickel alloys the oil industry. For subsea engineering, possibility to weld high-strength materials an effective manner is essential. Friction Stir Welding (FSW) alternative join several retaining their properties or even improving them. This fact relevant for Corrosion-Resistant Alloys (CRA) used deep-water exploitation hydrocarbons. Publications up now have focused on FSW Inconel® series as alloy 600, 625, and 718. To provide...
Friction surfacing process is employed to deposit metallic coatings, whereby similar and dissimilar material combinations can be realized. The applied as a local repair technology, or the coating locally modify surfaces. One advantage of this that coatings are deposited in solid state without reaching melting range materials, thereby avoiding dilution with substrate. involved severe plastic deformation under high temperatures alters microstructure material, leaving it fully dynamically...
Understanding the acting wear mechanisms in many cases is key to predicting lifetime, developing models describing component behavior, or for improvement of performance components under tribological loading. Conventionally scanning electron microscopy (SEM) and sometimes additional analytical techniques are performed order analyze appearances, i.e., grooves, pittings, surface films, others. In addition, experience required draw correct relevant conclusions on damage from obtained data. Until...
In this work, Al alloys with 6.6%, 10.4%, and 14.6% Si were deposited as thick coatings by Friction Surfacing (FS), resulting in grain refinement spheroidization of needle-shaped eutectic phase. Lubricated sliding wear tests performed on a pin-on-disc tribometer using Al-Si as-cast FS processed states pins 42CrMo4 steel discs. The chemical composition the worn surfaces was analyzed X-ray photoelectron spectroscopy (XPS). mechanisms studied scanning electron microscopy (SEM) focused ion beam...
In friction surfacing (FS), material is deposited onto a substrate in the plasticized state, using frictional heat and shear stresses. The coating remains solid state undergoes severe plastic deformation (SPD) at high process temperatures (≈0.8 Tmelt), followed by cooling rates range of 30 K/s. Dynamic recrystallization thermal cycle determine resulting microstructure. this study, Ni-based alloy 625 was 42CrMo4 substrate, suitable, for instance, repair welding corrosion protection layers....
Powder bed fusion‐laser beam/metal (PBF‐LB/M) additive manufacturing provides a high potential to overcome the poor machinability of nickel‐free interstitial alloy austenitic (HIA) steels. Therefore, this study focuses on PBF‐LB/M processability HIA X40MnCrMoN21‐18‐2 and effect postprocessing microstructure chemical homogeneity. Samples are fabricated laboratory industrial machine subsequently postprocessed by conventional solution annealing or hot isostatic pressing (HIP). The influence...
Improving the mechanical properties of bulk and near-surface materials alternating dynamics cavitating bubbles are two main methods to reduce cavitation erosion damage. Grinding polishing, as common surface finishing stages, can alter damage on metallic by affecting both bubble surface. In this paper, ultrasonic resistance 316L NiAl-bronze alloys, each with initial conditions grinding polishing is investigated, focussing material reaction. The mechanisms removal discussed based subsurface...