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We have published various academic papers on the evaluation and metallurgical control of hot cracking phenomena occurring in welds and additively manufactured parts of directionally solidified and single-crystal nickel-based superalloys.
We have published various academic papers on the evaluation and metallurgical control of hot cracking phenomena occurring in welds and additively manufactured parts of directionally solidified and single-crystal nickel-based superalloys.
Recently, to address previously unidentified solidification cracking phenomena that cannot be fully explained by conventional metallurgical approaches, we have been actively incorporating phase-field modeling into our research framework.
Recently, to address previously unidentified solidification cracking phenomena that cannot be fully explained by conventional metallurgical approaches, we have been actively incorporating phase-field modeling into our research framework.
2025 Materials Communications Today
2025 Materials
2024 JMR&T
Patents
Patents
Publications (only corresponding)
Publications (only corresponding)
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
312계 용가재 적용에 따른 XM-19 스테인리스강 용접부 미세조직 및 기계적 성질, Journal of Welding and Joining 2025;43(2):205-213. (https://doi.org/10.5781/JWJ.2025.43.2.10)
Sung-Jin Lee and Eun-Joon Chun*, Applicability of Hf-Free 247LC as a Filler Metal for Hot Crack-Free 247LC Superalloy Welds Assisted by Varestraint Testing , Materials, 2025. https://doi.org/10.3390/ma18061284
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
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.
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.
Sung-Jin Lee and Eun-Joon Chun* et al. Solidification Crack Free Welding Strategy via Ultra High Precision Laser Scanning at a Single Grain of Directionally Solidified and Single Crystal Superalloys, Journal of Welding and Joining, 2023. DOI: https://doi.org/10.5781/JWJ.2023.41.4.4
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
Eun-Joon Chun* , Strategy of Suppressing the Solidification Cracking Susceptibility of 247LC Superalloy Weld Metals using Commercial Ni-Based Fillers), Journal of Welding and Joining, 2023. DOI:https://doi.org/10.5781/JWJ.2023.41.1.7
Eun-Joon Chun* et al., "Liquation cracking susceptibility of remelted and reheated weld metals in CM247LC superalloy using multi-bead Varestraint testing", Science and Technology of Welding Joining, 2023. https://doi.org/10.1080/13621718.2022.2122246
Kyeong-Min Kim, and Eun-Joon Chun* et al., “Quantifying susceptibility to solidification cracking in oscillated CM247LC superalloy welds via Varestraint testing”, Metals and Materials International, 2023. https://doi.org/10.1007/s12540-022-01250-4
Eun-Joon Chun* et al., "Suppression of liquation cracking susceptibility via pre-weld heat treatment for manufacturing of CM247LC superalloy turbine blade welds", Journal of Advanced Joining Processes, 2021. https://doi.org/10.1016/j.jajp.2021.100069
Kyeong-Min Kim and Eun-Joon Chun* et al., “Effect of ERNiFeCr-2 Filler Metal on Solidification Cracking Susceptibility of CM247LC Superalloy Welds”, Korean Journal of Metals and Materials, 2021. http://dx.doi.org/10.3365/KJMM.2021.59.10.698
Conference and meeting
Conference and meeting
2025 Thermo-Calc User Group Meeting (서울)
Application of the Additive Manufacturing module and MICRESS to mitigate solidification cracking in single-crystal superalloy welds
2025 대한금속재료학회 추계학술대회 (광주)
Weldability-Driven Control of Solidification Cracking in CMSX-4 for Additive Manufacturing
2025 대한용접접합학회 추계학술대회 (대구)
Phase field를 이용한 단결정 초내열합금 아크 용접부 응고균열 현상 규명
Phase field를 활용한 니켈계 초내열합금 레이저 용접부 응고 미세조직 해석
2024 대한용접접합학회 추계학술대회 (창원)
PVR 및 Varestraint 시험을 연계한 최적의 용접 고온균열 평가법 개발 연구; Part 1 Alloy 690
단결정 에피택셜 성장된 CMSX-4 초내열합금 용접부의 BTR
Hf 미첨가 247LC 초내열합금의 용접부 액화균열거동
247LC DS 초내열합금 레이저 용접 시의 공정 조건 최적화 연구
ERNiCrMo-3 용가재 적용에 따른 247LC 초내열합금 용접부 BTR 축소 거동
2024 대한용접접합학회 춘계학술대회 (대구)
CMSX-4 단결정 초내열합금 용접 응고균열 거동: 용융부의 단결정 및 다결정화에 따른 BTR 변화
Solidification cracking behavior of 247LC superalloy welds
난용접성 247LC 초내열합금의 용접균열 거동 평가: 응고 및 액화균열의 종합적제어방안
Triple-bead Varestraint 시험을 이용한 247LC 다층용접부 액화균열 거동 평가
Hf-free 247LC 초내열합금 용접부의 응고균열 거동
단결정 CMSX-4 초내열합금 용접부의 응고균열 거동
2024 대한금속재료학회 춘계학술대회 (창원)
CMSX-4 단결정 초내열합금 용접 응고균열 거동: 단결정 및 다결정화에 따른 BTR 변화
2023 대한용접접합학회 추계학술대회 (부산)
Multi-bead Varestraint 시험을 이용한 247LC 초내열합금 보수용접 열영향부의 액화균열 민감도 평가
B 첨가에 따른 247LC 초내열합금 용접부 고온균열 거동
Hf 첨가에 따른 247LC 초내열합금 용접부 고온균열 거동
장시간 열간노출된 247LC 초내열합금 보수용접부의 액화균열 거동
2023 대한금속재료학회 추계학술대회 (대구)
Boron-free 247LC 초내열합금 용접부 응고균열 거동
5000시간 열간노출된 247LC 초내열합금 용접부의 고온균열 거동
CMSX-4 초내열합금 용접 응고균열거동에 미치는 응고범위 및 결정립계의 영향
2023 대한용접접합학회 춘계학술대회 (대전)
장시간 열간노출된 247LC 초내열합금 용접 열영향부의 액화균열 거동 및 저감방안
일방향응고, 단결정 니켈 초내열합금의 용접 응고균열 발생 임계조건과 야금학적 억제방안
2023 대한금속재료학회 춘계학술대회 (제주)
2022 대한용접접합학회 춘계학술대회 (대구)
발전터빈용 난용접성 초내열합금의 용접고온균열 제어 기술
CM247LC 초내열합금 용접부 응고균열 민감도 저감 방안에 대한 연구
2022 대한용접접합학회 용접야금위원회 심포지움:금속재료의 용접야금현상 및 연구동향 (제주)
발전터빈용 난용접성 초내열합금 재생용접부의 고온균열거동 평가 및 제어기술
International Welding & Joining Conference-Korea 2022 (IWJC-Korea 2022, Jeju), https://www.iwjc2022.org/
Investigations on repair-weldability of precipitation-hardened superalloy: In terms of hot cracking susceptibilities
Effect of oscillation on solidification cracking susceptibilities of non-weldable superalloy welds
Effect of aging treatment on PMZ hot cracking behavior in arc and laser welding of non-weldable superalloy
2022 대한금속재료학회 추계학술대회 (제주)
247LC 초내열합금 용접 고온균열 제어(Part 1): 싱글모드 레이저 용접부 액화균열 거동
247LC 초내열합금 용접 고온균열 제어(Part 2): 싱글모드 레이저 고속/워블 용접부 응고균열 거동
과시효에 따른 247LC 초내열합금 용접 열영향부 고온균열 민감도 변화 거동
재용융 및 재가열부 고온균열 관점에서의 난용접성 초내열합금 보수용접성 검토
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