A5012326584- Advanced materials and composites
- Metal Alloys Wear and Properties
- Additive Manufacturing Materials and Processes
- Electrodeposition and Electroless Coatings
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Metal and Thin Film Mechanics
- Microstructure and mechanical properties
- Advanced machining processes and optimization
- Microstructure and Mechanical Properties of Steels
- Additive Manufacturing and 3D Printing Technologies
- Welding Techniques and Residual Stresses
- Diamond and Carbon-based Materials Research
- Metallic Glasses and Amorphous Alloys
- Advanced Machining and Optimization Techniques
- Advanced ceramic materials synthesis
- Advanced Materials Characterization Techniques
- Tunneling and Rock Mechanics
- Metallurgy and Material Forming
- Advanced Surface Polishing Techniques
- Graphene research and applications
- Aluminum Alloys Composites Properties
- Corrosion Behavior and Inhibition
- Catalytic Processes in Materials Science
- Tribology and Wear Analysis
Chalmers University of Technology
2015-2024
Case Western Reserve University
2002
Max Planck Society
1996-1997
Leibniz Institute for Solid State and Materials Research
1996
University of Toronto
1995
University of Göttingen
1988-1993
Refractory high-entropy alloys (RHEAs), comprising group IV (Ti, Zr, Hf), V (V, Nb, Ta), and VI (Cr, Mo, W) refractory elements, can be potentially new generation high-temperature materials. However, most existing RHEAs lack room-temperature ductility, similar to conventional metals alloys. Here, we propose an alloy design strategy intrinsically ductilize based on the electron theory more specifically decrease number of valence electrons through controlled alloying. A ductile RHEA,...
There is an increasing demand to improve the service life of cutting tools during machining heat resistant superalloys (HRSA). Various studies showed that textured improved tribological properties and reduced forces, temperature, tool wear. Surface texturing can be seen as a futuristic design performance increase productivity. However, only limited research has been conducted in with inserts high-pressure coolant. In this work, three different micro texture designs on both rake flank face...
Abstract Additive manufacturing (AM) is able to generate parts of a quality comparable those produced through conventional manufacturing, but most the AM processes are associated with low build speeds, which reduce overall productivity. This paper evaluates how increasing powder layer thickness from 20 µm 80 affects speed, microstructure and mechanical properties stainless steel 316L that using laser bed fusion. A detailed characterization was performed scanning electron microscopy,...
Changes in the microstructure and mechanical properties during annealing at 800 °C have been characterized a 90% cold-rolled AlCoCrFeNi2.1 eutectic high-entropy alloy containing FCC B2 (ordered BCC) phases. In as-rolled condition, phase is found to contain high frequency of finely spaced deformation-induced boundaries, which provides driving force for recrystallization within this phase. Quantitative analysis electron backscatter diffraction data from annealed samples indicates that...
The exceptional properties of Heat Resistant Super Alloys (HRSA) justify the search for advanced technologies that can improve capability machining these materials. One such technology is application a coolant at high pressure while machining, strategic solution known least six decades. aim to achieve extended tool life, better chip control and improved surface finish. Another temperature in workpiece/tool interface targeting optimum cutting conditions. In most existing applications with...
Wear resistant coatings that comply with non-toxic environment goals are highly desirable. Cr3C2–NiCr is a promising alternative to the toxic, ‘Co’- containing WC–Co mitigate wear. The purpose of this study was examine suitability for automotive brake disc application by systematically investigating their dry sliding wear behavior at different test conditions. Therefore, High Velocity Air Fuel (HVAF) and Oxy (HVOF) were employed deposit coatings. powder feedstock as-deposited characterized...
The effect of defects and microstructure on mechanical properties Ti-6Al-4V welds produced by tungsten inert gas welding, plasma arc electron beam welding laser was studied in the present work. different weld types have been evaluated with respect to micro hardness, yield strength, ultimate tensile ductility fatigue at room temperature elevated temperature. Metallographic investigation carried out characterize microstructures fractographic relate performance. Electron finer microstructure,...
The effect of defects and microstructure on the mechanical properties Ti-6Al-4V welds produced by tungsten inert gas welding; plasma arc electron beam laser welding was studied in present work. different weld types were evaluated with respect to micro hardness; yield strength; ultimate tensile ductility; fatigue at room temperature elevated temperatures (200 °C 250 °C). Metallographic investigation carried out characterize microstructures types, fractographic conducted relate performance....
Additive manufacturing provides a unique possibility to manufacture parts with advanced design and thin-walled structures. To explore thin-wall capacity, laser powder bed fusion was employed fabricate 316 L samples different section thicknesses. A detailed microstructure characterization then carried out, tensile properties were assessed. It found that reducing the part thickness did not affect but reduce properties. Samples 1 mm exhibited lowest yield strength of 457 ± 11 MPa...
Graphene has emerged as excellent reinforcement for electrodeposited metallic composites. The poor stability of graphene in electrochemical baths makes it challenging to obtain uniform composite coatings. In this work, we investigate the possibility electrodeposit FeW-graphene coatings with organic stablizers. Polydiallyldimethylammonium chloride is selected stabilize oxide which added into electrolyte various concentrations. Scanning electron microscopy and Raman analysis confirmed...