Department of High Temperature Materials
- Head of Department
Choi, Baig-gyu
Department Introduction
Department of High Temperature Materials is currently working on alloy development, process optimization, test and evaluation and failure analysis of metallic materials applied to high-temperature on service. Major research fields of the department are on superalloys, which are mainly applied to industrial gas and steam turbine, aerospace, jet engine, and defense facilities.
+82-55-280-3321
Major Activities
- Development of single-crystal and directionally solidified materials for gas turbine : 5 papers published, 1 patent registered.
- Development of powder manufacturing and 3D printing process technologies for 650℃ class Ni-base superalloy : 2 papers published
Major Research Area
- Development of single crystal/directional solidification superalloys and their manufacturing process
- Development of corrosion/oxidation resistance superalloys for energy plant application
- Development of superalloys and their manufacturing process for steam turbine of combined cycle power plant
- Study on 3D printing technology for Ni-base superalloys
- Development of bonding materials for superalloys and repair process of gas turbine components
Future Research Plan
- High temperature mechanical testing and materials DB construction for gas turbines
- Development of 3D printing and post-processing technologies of Ni-base superalloys
- Superalloys for energy plant : Development of key technologies for commercialization
- Study on enhancement of weldability and printability in superalloys
- Repair process for hot parts in aircraft engine and gas turbine for power generation
Major R&D Activities
Development of single crystal superalloy for TIT 1650℃-grade industrial gas turbines
- Design of 8 candidates of Rene N5 grade single crystal alloy using thermodynamic calculation
- Optimization of heat treatment process for candidate alloys and evaluation of high-temperature properties – Comparative evaluation with Rene N5
- Evaluation of high-temperature properties of domestic single crystal castings by using Rene N5
of candidate alloys
heat treatment process
single crystal castings
Development of DS superalloy for TIT 1650℃-grade industrial gas turbines
- Control of metal-mold reaction during directional solidification of superalloy 247LC
- Database construction for tensile, creep and hot corrosion properties of DS 247LC superalloy prepared by 25kg-grade master ingot
- Recrystallization behavior of DS 247LC superalloy under creep deformation
247LC superalloy
corrosion properties (DB)
under creep deformation
Development of optimal design and process technology for 3D printing aircraft parts
- Selection of high-temperature parts for aircraft engines and optimization of additive manufacturing process parameters
- Design of 3DP strategies for specimens for property evaluation and aircraft parts and database establishment of heat treatment and post-treatment process
- Additive manufacturing of prototype parts and performance verification
according to 3DP process parameters
heat treatment design
property evaluation