A5033705602- Metallic Glasses and Amorphous Alloys
- Material Dynamics and Properties
- Glass properties and applications
- Metallurgical Processes and Thermodynamics
- Theoretical and Computational Physics
- Surface Roughness and Optical Measurements
- Welding Techniques and Residual Stresses
- Chalcogenide Semiconductor Thin Films
- Hydrogen embrittlement and corrosion behaviors in metals
- Phase-change materials and chalcogenides
- Quantum Dots Synthesis And Properties
- Phase Change Materials Research
- Thermodynamic and Structural Properties of Metals and Alloys
- Advanced Thermoelectric Materials and Devices
- Microstructure and Mechanical Properties of Steels
Universitat Politècnica de Catalunya
2021-2024
Sahand University of Technology
2018
The slow transition from an out-of-equilibrium glass towards a supercooled liquid is complex relaxation phenomenon. In this Letter, we study the correlation between mechanical and equilibration kinetics in ${\text{Pd}}_{20}{\text{Pt}}_{20}{\text{Cu}}_{20}{\text{Ni}}_{20}{\mathrm{P}}_{20}$ high-entropy metallic glass. evolution of stress with aging time was obtained unprecedented detail, allowing us to pinpoint new interesting features. long structural equilibrium contains wide distribution...
The two-tank molten salt thermal storage system is the most common solution in concentrated solar power (CSP) plants. Solar (60% NaNO3 + 40% KNO3) widely used energy material In tower technology, where salts must operate at temperatures ranging from 290 °C to 565 °C, several issues related tank failures have emerged recent years, with some of these attributed welding process. process joints 316L stainless steel (ASS) probes exposed a moving flow binary mixture containing 60% and KNO3 (solar...
Composite materials offer numerous advantages in a wide range of applications, including thermoelectrics. Here, semiconductor-metal composites are produced by just blending nanoparticles sulfide semiconductor obtained aqueous solution and at room temperature with metallic Cu powder. The blend is annealed reducing atmosphere afterward consolidated into dense polycrystalline pellets through spark plasma sintering (SPS). We observe that, during the annealing process, presence copper activates...
In the present work, effect of ultrasonic impacts on TIG welding microstructure and mechanical properties AISI 321 stainless steel was investigated main effective mechanism discussed. Metallographic results reveal that induce shock in weld metal change size morphology ferrite austenitic dendrites result grain refining compare to original welding. Ultrasonic vibration pool promotes dendrite fragmentation as refining. Moreover, convection restricts equiaxed growth near fusion line region by...
One of the hallmarks disordered matter is large amplitude anelastic deformation, i.e., fraction reversible deformation that not instantaneously recovered after release load but delayed in time. In this paper, elasticity studied for glass-forming ${\mathrm{Zr}}_{46.25}{\mathrm{Ti}}_{8.25}{\mathrm{Cu}}_{7.5}{\mathrm{Ni}}_{10}{\mathrm{Be}}_{27.5}$ alloy by means stress step and recovery experiments. Even at high temperatures, far from glass transition, can recover an important endure a long...
Modern detector technology and highly brilliant fourth-generation synchrotrons allow to improve the temporal resolution in time-resolved diffraction studies. Profiting from this, we applied temperature scanning X-ray photon correlation spectroscopy (XPCS) probe dynamics of a Pt-based metallic glass former glass, transition region, supercooled liquid, covering up six orders magnitude time scales. Our data demonstrates that structural alpha-relaxation process is still observable although it...