A5071630543- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Aluminum Alloy Microstructure Properties
- Aluminum Alloys Composites Properties
- Welding Techniques and Residual Stresses
- High Entropy Alloys Studies
- Intermetallics and Advanced Alloy Properties
- Lubricants and Their Additives
- Laser Material Processing Techniques
- Microstructure and mechanical properties
- Metal Alloys Wear and Properties
- Powder Metallurgy Techniques and Materials
- Tribology and Wear Analysis
- Advanced Combustion Engine Technologies
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Bauxite Residue and Utilization
- Titanium Alloys Microstructure and Properties
- Dental materials and restorations
- Biodiesel Production and Applications
- Muon and positron interactions and applications
- Microstructure and Mechanical Properties of Steels
- Tribology and Lubrication Engineering
Thailand National Metal and Materials Technology Center
2017-2024
National Science and Technology Development Agency
2018-2024
Institute for Materials Testing and Materials Technology Dr. Neubert
2012-2013
Abstract The effect of Mn addition on the microstructure, thermal and mechanical properties in as-cast cold-rolled Al–Sc–Zr alloys was studied. Electrical resistometry, differential scanning calorimetry microhardness measurements were used. Transmission electron microscopy, backscatter diffraction X-ray specimens quenched from temperatures pronounced changes resistivity helped to identify microstructural processes responsible for changes. distinct increase observed after annealing above...
Sintered Fe-Mo-Si-C steels were prepared from pre-alloyed Fe-0.85Mo powder added with fixed 4wt.% silicon carbide and varied graphite contents. It was found that the addition caused morphological change black nodular to vermicular particles resulted in decrease of nodular/vermicular particle fraction, increase pearlite fraction slight ferrite fraction. The either or Fe-Mo-Si-C/graphite core-shell whereas totally composed carbon. microstructural features showed influence on mechanical...
Solute clustering and precipitation processes in hot-extruded Al–Mn–Sc–Zr alloy were studied. Positron annihilation studies combined with electrical resistometry, microhardness testing microstructural characterization. Extrusion introduced dislocations which arranged into a cell structure. Sc solutes segregated at dislocations. Moreover, fine coherent Al3(Sc,Zr) particles precipitated during extrusion subsequent cooling. During the isochronal annealing agglomerated forming Sc-rich...
Selective laser melting (SLM), which is an additive manufacturing technology, attractive due to its ability freely form shapes. SLM forms a 3D material by building it layer-by-layer from metal powder. However, some issues have yet be resolved, including dimensional accuracy, surface finish, processing time, and mechanical properties such as roughness, hardness, crystal orientation. We demonstrate that pure titanium (Ti), clinically used for artificial bone hard tissue implants because...
The effect of hot extrusion at 350°C on microstructure, thermal, electrical and mechanical properties the AlMnScZr alloy was studied. samples cast hot-extruded alloys were annealed from 20°C up to 600°C. Transmission scanning electron microscopy backscatter diffraction examinations specimens quenched temperatures significant resistivity changes used identify microstructural processes responsible for these changes. as well is characterized by a dispersion fine coherent Al 3 Sc and/or (Sc,Zr)...
This paper reports results of a study aimed at understanding the precipitation processes occurring during annealing two AlScZr-based alloys with and without Mn prepared by powder metallurgy subsequent hot extrusion 350 • C. Samples were isochronally annealed up to ≈ 570 Precipitation behaviour was studied electrical resistometry dierential scanning calorimetry.Mechanical properties monitored microhardness HV1 measurements.Transmission electron microscopy examinations X-ray diraction...
<div class="section abstract"><div class="htmlview paragraph">Soot particles are produced inside the combustion chamber of internal engines and will later be exhausted into thermosphere. Part these contaminate engine oil. When this happens, diesel abrasion or, in a worst-case scenario, lubricant starvation occur. This circumstance eventually cause wear. research uses X-Ray Fluorescence (XRF) technique to analyze additive element For wear test, tribology Four ball tester...
Abstract Engine lubricant has an important role in decreasing friction and the wearing of moving parts engine. However, soot contaminated engine oil could change chemical physical properties that affect operation. Soot particles were simulated using carbon black order to eliminate effect metallic ash unburned hydrocarbon, which contained particulate matter. The was blended CI-4 lubricating oil. investigation wear associated with use a four-ball test. amount compared by measuring scar...
Nickel based alloy was fabricated by a laser powder bed fusion using the blue with wavelength of 450 nm and maximum output power 200 W, effect volumetric energy density (VED), on porosity evaluated for samples. A sample diode laser, recorded 0.012% at VED 33 J/mm3, indicating that it can be more efficiently than near-infrared fiber laser. Furthermore, revealed when surface roughness reached 37.5 μm, large voids were generated, high likelihood void formation approximately 40 μm or during...
316L stainless steel plate was fabricated by spatter free selective laser melting (SLM). has excellent properties such as corrosion resistance and hardness. But it is difficult to form into complicated structures because of hard work material. SLM can fabricate shapes builds a 3D material layer-by-layer from powder. Some issues, however, have yet be resolved, including dimensional accuracy, surface finishes, processing time, mechanical roughness There some problems that generated metal...
Soot particles are produced during combustion process in the diesel engine. These will later exhaust into thermosphere and part of them contaminate engine oil. When lubricant is contaminated with soot, abrasion or a worst-case scenario starvation occurs. This situation eventually lead ware. High volume soot also raises acid level area. If this state co-occurs high temperature volatile gases operation, corrosion may be produced. research study effect additive on dispersion oil size which...
A vacuum selective laser melting method with a beam profile control was developed to fabricate the high quality 3D object. To investigate of fabrication, denudation zone (DZ) as indicator evaluated make single bead. The main challenge is clarify correlation between DZ and profiles. profiles, such Gaussian mode, doughnut flat-top were formed in several modes, by dioptric system shaper. stainless steel 316L (SS316L) powder irradiated arbitrary pressure form bead, then measured. As result, it...
A pure titanium (Ti) plate was fabricated by selective laser melting (SLM) in a vacuum. Ti is attractive materials for medical, aerospace, and automotive applications, because they have properties of biocompatibility, high corrosion erosion resistance, mechanical but forming complicated structures challenging due to difficulties working the material. Although some studies reported form pores SLMed samples spattering generated irradiation, there are few reports that investigate details...