A5024647955- High-Temperature Coating Behaviors
- High Temperature Alloys and Creep
- Nuclear Materials and Properties
- Intermetallics and Advanced Alloy Properties
- Metal Forming Simulation Techniques
- Metallurgical Processes and Thermodynamics
- Aluminum Alloys Composites Properties
- Material Properties and Failure Mechanisms
- Advancements in Solid Oxide Fuel Cells
- Advanced ceramic materials synthesis
- Iron and Steelmaking Processes
- High Entropy Alloys Studies
- Elasticity and Wave Propagation
- Advanced Welding Techniques Analysis
- Welding Techniques and Residual Stresses
- Catalytic Processes in Materials Science
- Numerical methods in engineering
- Chemical Looping and Thermochemical Processes
- Thermal and Kinetic Analysis
Islamic Azad University, Karaj
2021-2023
Islamic Azad University, Science and Research Branch
2020
Islamic Azad University, Tehran
2017-2019
University of Tehran
2009
Abstract In this research, the effect of thermal shock has been investigated on microstructure and cyclic oxidation Pt-Al-7%YSZ coating applied Rene-80 superalloy. The microstructural evaluation phase identification were performed by field emission scanning electron microscope (FE-SEM) X-ray diffraction (XRD). test consisted repeated cycles rapid cooling between 900 °C 400 °C. Prior to test, specimen coated Pt-electroplating, high-activity low-temperature (HALT) aluminizing spray YSZ ceramic...
The problem of determining the dynamic stress intensity factors (DSIFs) in a medium made by functionally graded orthotropic materials weakened multiple axisymmetric cracks under torsional impact loading is investigated. It assumed that mass density and shear modulus two principal directions material (FGM) vary exponentially along z-axis. solution rotational Somigliana-type ring dislocation an FGM obtained using Laplace Hankel transforms. This used to construct integral equations for system...
In this study, the oxide scale formation on Rene-80 superalloy after hot corrosion under thermal shock has been investigated. The X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM) were used for phase identification evaluation of scale, respectively. test was performed by depositing Na2SO4 salt at beginning each cycle surface specimens. results showed that occurred intermittently with basic fluxing mechanism re-precipitation discontinuous porous oxides. growth...
In some of the Direct Reduction (DR) methods, iron oxides would be reduced with reformed natural gas. Due to reduction conditions, temperature, gas flow, pressure, and component reducer gas, decomposition CH4, CO Csol/soot formation on surface pellets is possible. Consequently, rate reduction, consumption could changed. this research, effect coated hematite lime oxides, also formation, reported. By increasing 3–8% a diameter 10 mm, 15–40% H2 in H2/CH4 mixture, 1050 1250°C reaction decreased,...
The effect of oxide scale and microstructural changes during 10, 20, 40 hot corrosion cycles on the high-temperature tensile properties Rene-80 superalloy at 950 °C was investigated. Due to formation micro-cracks micro-voids, compressive stresses produced from Cr2O3 NiO growth, stemming NiMoO4 transformation Al internal oxidation, spalled. By increasing cycles, UTS (Ultimate Tensile Strength) El.% (Elongation) first decreased then increased due propagation intergranular vertical cracks after...