A5081398328- Metallurgy and Material Science
- Aluminum Alloy Microstructure Properties
- Coal Combustion and Slurry Processing
- Additive Manufacturing Materials and Processes
- Materials Engineering and Processing
- Environmental and Industrial Safety
- Aluminum Alloys Composites Properties
- Laser-induced spectroscopy and plasma
- Additive Manufacturing and 3D Printing Technologies
- Electron and X-Ray Spectroscopy Techniques
- Machine Learning in Materials Science
- Polymer Nanocomposites and Properties
- Advanced Materials Characterization Techniques
- Ion-surface interactions and analysis
- Advanced Surface Polishing Techniques
- X-ray Diffraction in Crystallography
- Advanced machining processes and optimization
- Advanced materials and composites
- Welding Techniques and Residual Stresses
- Cavitation Phenomena in Pumps
- High-Temperature Coating Behaviors
- Orthopaedic implants and arthroplasty
- Natural Fiber Reinforced Composites
- Material Properties and Applications
- Polymer crystallization and properties
Lund University
2021-2024
Polytechnic University of Timişoara
2018-2021
Al-alloys incorporating Mn, Cr and Zr, tailored for powder bed fusion-laser beam processes with solubilities three times equilibrium have recently been developed that yield a high strength. Mn Cr-enriched precipitates form during printing heat treatment influence the material's mechanical properties hence making it important to understand their kinetics. In this study, direct imaging of these was accomplished through utilisation in situ synchrotron-based scanning X-ray fluorescence. During...
Inconel 718 is one type of nickel-based alloy used for a large range applications, including gas turbines and aeroengines components. Although mechanical thermodynamic properties this material have been deeply studied in the past years, method able to investigate local thin white layer formed on surface after machining remains challenging. Here, 90 nm X-ray beam probe strain, crystal orientation, chemical composition grains layer. Data reveals mosaicity induced by tool during machining. The...
Nano-scale chemical inhomogeneity in surface oxide films formed on a V- and N-containing martensite stainless steel tempering heating induced changes are investigated by combination of synchrotron- based hard X-ray Photoelectron emission spectroscopy (HAXPES) microscopy (HAXPEEM) as well microscopic absorption (m-XAS) techniques. The results reveal the micron-sized Cr2N- VN-type particles, while matrix phase exists due to localised formation nano-sized nitride particles at 600 °C. film...
The CuZnPb brasses are used on a large scale in manufacturing component details for hydraulic driving or regulation devices, as well small and huge vanes. Partially the material is bodies partially sealing seats. During normal operation those pieces subjected to cavitation erosion. present paper analyzes erosion behavior resistance of brass CuZn39Pb3 mentioned details. For experimental researches was standard vibration device realized Timisoara Polytechnic University Cavitation Laboratory....
The cavitation erosion researches conducted on vibratory devices presents a way of degradation very similar with those encountered in industrial equipment. Photos the cloud as well eroded surfaces, at various exposure periods, are basis present work description this destruction mechanism. For experiments, there were used two materials: gray cast iron lamellar graphite and high resistance bronze. device is that Timisoara Polytechnic University Cavitation Laboratory which respects integrally...
Abstract The influence of sodium oleate additives on processing and morphology polypropylene ‐ co ‐polyamide (PP/CPA) mixture melts has been investigated. It is shown that located in the interphase components acts at small (up to 3 wt%) as an interfacial tension agent, improving miscibility polymers, increasing kinetic stability mixtures degree PP dispersion co‐polyamide matrix. plasticizing effect melt was observed 7 wt% a reduction viscosity. ultrathin fibers (microfibers) strictly...
Abstract Vacuum diffusion-bonded printed circuit heat exchangers are an attractive choice for the high-temperature, high-pressure demands of next-generation energy applications. However, early reports show that high-temperature materials desired these applications suffer from poor bond strengths due to precipitation at line, preventing grain boundary migration. In this study, a diffusion stainless steel grade 321H is investigated, and mechanical properties found be caused by Ti(C, N) line....
Abstract The paper highlights the behavior at vibratory cavitation erosion of CuZn39Pb3 brass microstructures, as obtained by in-depth heat treatments. Two treatment cycles are analysed (hardening 800ºC, followed cooling in water, and hardening with tempering 400ºC air). micro-hardness measurements show that change microstructure, relative to initial status material (semi-finished), determines higher values micro-hardness. studies erosion, using vibrating standard piezoelectric crystal...
Abstract Interdiffusion and chemical reactions contribute to tool wear in metal machining. Increased understanding of these processes, through characterisation worn tools, can facilitate design more resilient materials diffusional passivation. However, the unknown reaction conditions, large number elements, formation interspersed phases makes for a complex analysis. Here, we demonstrate use scanning transmission electron microscopy energy dispersive X‐ray spectroscopy characterising...
A new family of high-strength Al-alloys has recently been developed, tailored for the powder bed fusion-laser beam process. In these alloys, Mn, Cr and Zr are incorporated in solid solution at amounts up to three times that equilibrium as-printed state. Mn Cr-enriched precipitates form during printing heat treatment influence material's mechanical properties. this study, direct imaging was accomplished through utilisation situ synchrotron-based scanning X-ray fluorescence. During treatment,...
Abstract Among the materials, often used in manufacturing details subjected to cavitation erosion, such as pump impellers, propellers, fittings, valves body, etc. there are also CuZnPb brasses. Their use molded or laminated condition, for pieces cavitation, is of short duration due degradation through erosion. For this reason, any method increasing extension life, beneficial. In direction enrolled results obtained paper, by tests made on CuZn39Pb3 brass, three volumetric heat treatment...
Abstract The bronze CuSn is used sometimes for equipment components working in cavitation conditions, as example ship propellers, bodies and other parts of valves. To increase the time, those elements can be subjected to volumetric thermal treatments. present research concerned with mean durability <?CDATA ${\bar{\delta }}_{cav}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mover accent="true"> <mml:mi>δ</mml:mi> <mml:mo>¯</mml:mo>...
Abstract CuSn bronze alloys are some of the most used in casting freshwater ship propellers. Through in-depth heat treatments, microstructure and hardness substantially altered when compared with initial state material after casting. The work highlights change behavior resistance to vibrating cavitation erosion CuSn12-C microstructures, being subject two treatments (hardening at 700ºC, followed by cooling water, hardening tempering 500ºC 250ºC, air). experimental tests performed using...