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Evaluation of Liquation Cracking Behavior and Susceptibility in Heat-Affected Zone of CM247LC Superalloy Welds for Turbine Blade Application
CM247LC 초내열합금 터빈 블레이드 용접 열영향부의 액화균열 발생 거동 및 민감도 평가
Ye-Seon Jeong, Kyeong-Min Kim, Uijong Lee, Hyungsoo Lee, Seong-Moon Seo, Eun-Joon Chun
정예선, 김경민, 이의종, 이형수, 서성문, 천은준
Korean J. Met. Mater. 2020;58(12):875-886.   Published online 2020 Dec 4
DOI: https://doi.org/10.3365/KJMM.2020.58.12.875

In this study, the weldability of the as-cast CM247LC superalloy for turbine blade applications was metallurgically evaluated in terms of its hot cracking behavior and susceptibility. For this purpose, a real blade was manufactured using a directional solidification casting process, and gas tungsten arc welding was performed at the tip..... More

PWHT Cracking Susceptibility in the HAZ of Martensitic 10Cr Steel for A-USC Power Plant
극초임계압 화력발전소용 마르텐사이트계 10Cr 내열강 열영향부의 용접후열처리 균열 감수성
Minjeong Kim, Yongjoon Kang, Namkyu Kim, Sanghoon Lee, Sangwoo Song, Namhyun Kang
김민정, 강용준, 김남규, 이상훈, 송상우, 강남현
Korean J. Met. Mater. 2019;57(7):430-437.   Published online 2019 Jun 5
DOI: https://doi.org/10.3365/KJMM.2019.57.7.430

In this study, the post-weld heat treatment (PWHT) cracking susceptibility in the heat affected zone (HAZ) of martensitic 10Cr steel was evaluated. The specimens taken from the 10Cr steel were thermally cycled using a Gleeble to simulate HAZ 1 (δ-ferrite) and HAZ 2 (single phase, γ). HAZ 2 had martensite..... More

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