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논문 기본 정보

자료유형
학술저널
저자정보
Gitae Park (Korea Institute of Materials Science) Yongjoon Kang (Korea Institute of Materials Science) Chan Kyu Kim (Korea Institute of Materials Science) Seolbin Jeong (Korea Institute of Materials Science) Sang Woo Song (Korea Institute of Materials Science)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第42卷 第3號
발행연도
2024.6
수록면
239 - 247 (9page)

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초록· 키워드

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This study focuses on the microstructural evolution of Inconel 718 superalloy, a precipitation-hardened superalloy, subjected to various manufacturing processes and subsequent thermal exposures. Conventional manufacturing methods such as casting and forging were compared with modern 3D printing techniques, notably wire-arc additive manufacturing. Subsequent treatments, including solution treatment and two-stage aging, as well as bead-on-plate welding, were performed to assess their effects on the microstructure of Inconel 718. The transformations of strengthening phases such as γ′(Ni₃(Al,Ti)), γ″(Ni₃Nb) and intermetallic δ(Ni₃Nb) phases were observed to vary significantly under different thermal cycles, and these variations in phase transformation are anticipated to lead to a degradation in mechanical performance post-welding. Additionally, thermodynamic calculations using commercial Calphad software were utilized to investigate phase transformations in the welds, providing critical insights into how manufacturing processes and thermal exposures affect the stability and distribution of microstructural features, thereby highlighting the complexities of phase dynamics in this high-performance alloy.

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Abstract
1. Introduction
2. Experimental procedure
3. Results and discussion
4. Conclusions
References

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