The UHP Materials Processing Laboratory conducts cutting-edge research and advanced education on ultra-high-performance (UHP) metallic materials, with a strong focus on ultra-high-precision and ultra-high-purity processing technologies.

UHP 소재프로세스연구실은 발전 및 항공용 가스터빈, 차세대 원자로 등 극한환경 발전 시스템에 적용되는 첨단 내열소재 및 수퍼알로이에 대한 연구를 수행하고 있습니다. 

특히, 응고론을 바탕으로 용접·적층제조 과정에서의 프로세스–미세조직–고온결함 상관관계에 통합적으로 접근합니다. 

극한 첨단소재의 응고 프로세스 기술은, 전기차 (전력반도체 및 이차전지) 산업에 요구되는 초정밀 레이저 접합·패키징 기술 연구 분야로도 확장시켜 나가고 있습니다. 

최근 인공지능 기술의 급속한 발전과 초대형 데이터센터 및 고효율 전력 시스템 수요 증가에 따라, 발전 및 에너지 활용 산업을 지탱하는 고신뢰성 소재·프로세스 기술의 중요성이 더욱 커지고 있습니다. 

본 연구실은 응고 프로세스를 바탕으로 가스터빈·원자로·모빌리티·반도체 등 발전부터 에너지 활용산업을 아우르는 연구 스펙트럼을 구축해 나가고 있습니다.

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Recent Research Highlights

Our recent research activities include:

• Hot cracking mechanisms in welding and additive manufacturing (AM) of advanced superalloys for next-generation gas turbine engines and nuclear power systems.

• Laser-based joining and packaging technologies for electric vehicle battery and power semiconductor systems. 

• Phase-field–based computational modeling of solidification phenomena 

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Achievements Over the Past Three Years

• More than 20 peer-reviewed journal publications addressing weld-induced hot cracking phenomena
  
  

• Over 50 presentations at leading international academic and industrial conferences
  
  

• Ten patent applications and granted patents on novel processing technologies for hot cracking mitigation and control in welding

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Vision

Advanced materials are only meaningful when they can be reliably implemented in real processes and systems.

We are committed to advancing predictive and reliable high-performance materials processing technologies to enable the practical implementation of advanced materials, thereby contributing to the development of next-generation energy and mobility systems through the integration of experimental investigation and computational materials science.

1. Min-chang Shin and  Eun-Joon Chun*, Localized Crack-Free Welding for DS 247LC Superalloy Correlated with Single-Mode Fiber Laser and CET Theory, Korean Journal of Metals and Materials, 2025. https://doi.org/10.3365/KJMM.2025.63.11.887

2. Min-chang Shin and  Eun-Joon Chun*, New Findings on Reduced Solidification Brittle Temperature Range in Epitaxially Grown CMSX-4 Superalloy Welds via Varestraint Testing, Materials Today Communications, 2025. https://doi.org/10.1016/j.mtcomm.2024.111201

3. Sung-Jin  Lee and Eun-Joon Chun* et al., Effects of Hf and carbide formation behavior on solidification cracking susceptibilities of 247LC superalloy welds, Materials Chemistry and Physics, 2024. https://doi.org/10.1016/j.matchemphys.2024.129147.

4. Hye–Eun Jeong, and Eun-Joon Chun* et al., Effect of local carbide formation behavior on repair weld liquation cracking susceptibility for long-term-serviced 247LC superalloy, Journal of Materials Research and Technology, 2024. https://doi.org/10.1016/j.jmrt.2023.12.003.

5. Ye-Ji Lee and Eun-Joon Chun*, Correlation Between Solidification Cracking and Composition Distribution in Green Laser Welds of Lithium-Ion Battery Busbars, Korean Journal of Metals and Materials, 2025. https://doi.org/10.3365/KJMM.2025.63.5.356

6. Eun-Joon Chun* et al., Liquation Crack-free Welding Strategy for 247LC DS Superalloy by Control of Pipeline Diffusion via Ultra-high-speed Laser Beam Scanning, Science and Technology of Welding Joining, 2023. https://doi.org/10.1080/13621718.2023.2189367