A5068550587- Electromagnetic Effects on Materials
- Microstructure and mechanical properties
- Aluminum Alloy Microstructure Properties
- Material Properties and Failure Mechanisms
- Aluminum Alloys Composites Properties
- Microstructure and Mechanical Properties of Steels
- Intermetallics and Advanced Alloy Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced Welding Techniques Analysis
- Metallurgical Processes and Thermodynamics
- Solidification and crystal growth phenomena
- Metal Alloys Wear and Properties
- Non-Destructive Testing Techniques
- Materials Engineering and Processing
- Supercapacitor Materials and Fabrication
- Additive Manufacturing and 3D Printing Technologies
- Conducting polymers and applications
- Geotechnical and Geomechanical Engineering
- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Advanced Energy Technologies and Civil Engineering Innovations
- Concrete Corrosion and Durability
- Advanced Sensor and Energy Harvesting Materials
- Metal and Thin Film Mechanics
- Corrosion Behavior and Inhibition
Korea Institute of Industrial Technology
2016-2024
Seoul National University
2013-2016
Microscale defects in materials damage the originally designed microstructure during their use, degrading mechanical properties/life expectancy. Therefore, various methods for repair have been proposed based on concept of self-healing. However, self-healing bulk metallic is still a challenge due to strong atomic bonding. Here, we introduce sub-second electric pulsing which can enhance kinetics microstructural changes infinitely reset damaged as non-autonomous method. The principle resetting...
The effect of electric current on the refinement pure aluminum during solidification was investigated based microstructural observations and numerical simulations. Coarse columnar grains are observed without application direct (DC off), while equiaxed clearly exist under solidification; area fraction zone increased up to 66% current, whereas it is negligible in DC off condition. Also, grain size decreased drastically 221 μm compared that several mm affected by electrical conditions such as...
In aluminum casting, the temperature of liquid and dissolved hydrogen density are crucial factors to be controlled for purpose both quality control molten metal cost efficiency. However, empirical numerical approaches predict these parameters quite complex time consuming, it is necessary develop an alternative method rapid prediction with a small number experiments. this study, machine learning models were developed content in aluminum. The obtained experimental data was preprocessed used...
The effect of a single pulse electric current with short duration on the quasi-static tensile behavior magnesium AZ31 alloy is experimentally investigated. A less than 1 second applied to specimen, while specimen being deformed in plastic region under loads. After nearly instant decrease flow stress at current, shows strain hardening until failure specimen. experimental result that strain-hardening parameters (the strength coefficient and exponent) curve after strongly depend energy density...
Abstract Grain refinement is a crucial issue in metallic materials. One of the emerging techniques to obtain equiaxed grains apply an electric current liquid metal during solidification. With this view, paper, effect on solidification behavior various cavity shapes mold was investigated. Cylinder-, cube-, and cuboid-shaped cavities designed have similar volume were used. By applying aluminum, effectively refined with grain size approximately 350 µm for all three types cavities. The...
Super duplex stainless steels (SDSSs), exhibiting excellent strength and corrosion resistance, serve as the attractive materials in a variety of industries. However, improvements their ductility impact-toughness are required extreme environments. In this study, effects gadolinium on microstructures Charpy impact properties super were investigated. A base steel (BDSS) gadolinium-added (GDSS) successfully fabricated using an air casting method. The oxygen content grain size SDSSs found to...