한국분말재료학회지 (Journal of Powder Materials)

  • 제19권3호
  • /
  • Pages.215-219
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  • 2012
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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분말야금 및 주조형 니켈기 초내열합금 크리프 신뢰성의 초음파 모니터링

Evaluation of Creep Reliability of Powder Metallurgy and Cast-type Ni-based Superalloy by Using Ultrasonic Wave

  • 최찬양 (서울과학기술대학교 신소재공학과) ;
  • 송진헌 (고려대학교 재료금속공학부) ;
  • 오세웅 (한국야금(주) 생산기술연구소) ;
  • 김정석 (한양대학교 기계공학부) ;
  • 권숙인 (고려대학교 재료금속공학부) ;
  • 오승탁 (서울과학기술대학교 신소재공학과) ;
  • 현창용 (서울과학기술대학교 신소재공학과) ;
  • 변재원 (서울과학기술대학교 신소재공학과)
  • Choi, Chan-Yang (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Song, Jin-Hun (Department of Materials Science and Engineering, Korea University) ;
  • Oh, Se-Ung (Production Engineering Research Center, KORLOY Co. Ltd.) ;
  • Kim, Chung-Seok (Devision of Mechanical Engineering, Hanyang University) ;
  • Kwun, Sook-In (Department of Materials Science and Engineering, Korea University) ;
  • Oh, Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Hyun, Chang-Yong (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Byeon, Jai-Won (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 투고 : 2012.04.13
  • 심사 : 2012.05.11
  • 발행 : 2012.06.28
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초록

An attempt was made to evaluate creep reliability of two commercial Ni-based superalloys by using ultrasonic wave. The materials include fine-grained PM alloy fabricated by mechanical alloying and subsequent hot isostatic pressing, and IN738LC cast alloy with a grain size of a few cm. Microstructural parameters (fraction of creep cavity and size of ${\gamma}^{\prime}$ precipitates) and ultrasonic parameters (velocity, attenuation) were measured to try to find relationships between them. Ultrasonic velocity decreased with creep cavity formation in PM alloy. On the other hand, no distinct changing trend of ultrasonic velocity was observed for IN738LC alloy. Ultrasonic attenuation was found to have a linear correlation with the size of ${\gamma}^{\prime}$ precipitates and was suggested as a potential parameter for monitoring creep reliability of IN738LC alloy.

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참고문헌

  1. S. H. Choi, J. Y. Yun, H. M. Lee, Y. M. Kong, B. K. Kim and K. A. Lee: J. Kor. Powd Met. Inst., 18 (2011) 122 (Korean). https://doi.org/10.4150/KPMI.2011.18.2.122
  2. S. H. Jeong, S. H. Kang, C. H. Han, T. K. Kim, D. H. Kim and J. S Jang: J. Kor. Powd Met. Inst., 18 (2011) 456 (Korean). https://doi.org/10.4150/KPMI.2011.18.5.456
  3. H. M. Ledbetter, R. J. Fields and S. K. Datta: Acta Metall., 35 (1987) 2393. https://doi.org/10.1016/0001-6160(87)90086-1
  4. S. I. Kwun, S. T. Hong and W. Y. Choo: J. Mater. Sci. Letters, 19 (2000) 1453. https://doi.org/10.1023/A:1006779607608
  5. J. W. Byeon and S. I. Kwun: Mater. Trans., 44 (2003) 2184. https://doi.org/10.2320/matertrans.44.2184
  6. J.W. Byeon and S.I. Kwun: Mat. Letters, 58 (2004) 94. https://doi.org/10.1016/S0167-577X(03)00422-1
  7. J.W. Byeon and S.I. Kwun: Mater. Trans., 44 (2003) 1204. https://doi.org/10.2320/matertrans.44.1204
  8. J. W. Byeon, S. B. Choi and S. I. Kwun: J. Kor. Inst. Met. & Mater., 35 (1997) 657 (Korean).
  9. J. Li and R.H.Wahi: Acta Metall. Mater., 43 (1995) 507. https://doi.org/10.1016/0956-7151(94)00252-D
  10. J. Cadek: Creep in Metallic Materials, Elsevier, Amsterdam (1988) 235.
  11. USA: ASTM C20-87, Standard Test Method for Apparent Porosity, Bulk Density, and Water Absorption of Burned Refractory Brick and Shapes by Boiling Water.
  12. J. W. Byeon: Ph. D. thesis, Nondestructive evaluations of microstructures and mechanical properties of Ni base superalloy and 2.25 CrMo steel degraded at high temperatures, Korea University, Seoul (2001) 50 (Korean).
  13. J. Krautkramer and H. Krautkramer: Ultrasonic Testing of Materials, Springer-Verlag, New York (1990).
  14. M. Matan, D.C. Cox, C. M. F. Rae and R. C. Reed: Acta Mater., 47 (1999) 2031. https://doi.org/10.1016/S1359-6454(99)00093-2
  15. O. V. Abramov: Ultrasound in Liquid and Solid Metals, CRC Press Inc., USA, (1994).