Journal of Welding and Joining

  • 제31권3호
  • /
  • Pages.31-38
  • /
  • 2013
  • /
  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지
DOI QR코드

DOI QR Code

니켈기 초내열합금의 파형 결정립계 구조가 보론 편석과 재현 열영향부 액화균열거동에 미치는 영향

Effects of Serrated Grain Boundary Structures on Boron Enrichment and Liquation Cracking Behavior in the Simulated Weld Heat-Affected Zone of a Ni-Based Superalloy

  • 홍현욱 (창원대학교 신소재공학부) ;
  • 최준우 (창원대학교 신소재공학부) ;
  • 배상현 (창원대학교 신소재공학부) ;
  • 윤중근 (창원대학교 신소재공학부) ;
  • 김인수 (한국기계연구원 부설 재료연구소 내열재료연구실) ;
  • 최백규 (한국기계연구원 부설 재료연구소 내열재료연구실) ;
  • 김동진 (한국원자력연구원 원자력재료연구부) ;
  • 조창용 (한국기계연구원 부설 재료연구소 내열재료연구실)
  • Hong, Hyun-Uk (Department of Materials Science and Engineering, Changwon National University) ;
  • Choi, June-Woo (Department of Materials Science and Engineering, Changwon National University) ;
  • Bae, Sang-Hyun (Department of Materials Science and Engineering, Changwon National University) ;
  • Yoon, Joong-Geun (Department of Materials Science and Engineering, Changwon National University) ;
  • Kim, In-Soo (High Temperature Materials Research Group, Korea Institute of Materials Science) ;
  • Choi, Baig-Gyu (High Temperature Materials Research Group, Korea Institute of Materials Science) ;
  • Kim, Dong-Jin (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Jo, Chang-Yong (High Temperature Materials Research Group, Korea Institute of Materials Science)
  • 투고 : 2013.01.22
  • 심사 : 2013.06.03
  • 발행 : 2013.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The transition of serrated grain boundary and its effect on liquation behavior in the simulated weld heat-affected zone (HAZ) have been investigated in a wrought Ni-based superalloy Alloy 263. Recently, the present authors have found that grain boundary serration occurs in the absence of adjacent coarse ${\gamma}^{\prime}$ particles or $M_{23}C_6$ carbides when a specimen is direct-aged with a combination of slow cooling from solution treatment temperature to aging temperature. The present study was initiated to determine the interdependence of the serration and HAZ property with a consideration of this serration as a potential for the use of a hot-cracking resistant microstructure. A crystallographic study indicated that the serration led to a change in grain boundary character as special boundary with a lower interfacial energy as those terminated by low-index {111} boundary planes. It was found that the serrated grain boundaries are highly resistant to boron enrichment, and suppress effectively grain coarsening in HAZ. Furthermore, the serrated grain boundaries showed a higher resistance to susceptibility of liquation cracking. These results was discussed in terms of a significant decrease in interfacial energy of grain boundary by the serration.

키워드

참고문헌

  1. J.J. Pepe and W.F. Savage, Weld. J., 46 (1967), 411s-422s
  2. R. Nakkalil, N.L. Richards and M.C. Chaturvedi : Scripta Metall., 26 (1992), 1599-1604 https://doi.org/10.1016/0956-716X(92)90263-E
  3. O.A. Ojo and M.C. Chaturvedi : Metall. Mater. Trans. A, 38 (2007), 356-369 https://doi.org/10.1007/s11661-006-9025-1
  4. H.B. Kim and C.H. Lee : Journal of KWJS, 15 (1997), 46-55 (in Korean)
  5. H. Guo, M.C. Chaturvedi, N.L. Richards and G.S. McMahon : Scripta Mater., 40 (1999), 383-388 https://doi.org/10.1016/S1359-6462(98)00427-8
  6. K.R. Vishwakarma, N.L. Richards and M.C. Chaturvedi : Mater. Sci. Eng. A, 480 (2008), 517-528 https://doi.org/10.1016/j.msea.2007.08.002
  7. P. Lin, G. Palumbo, U. Erb and K.T. Aust : Scripta Metall. Mater., 33 (1995) 1387-1392 https://doi.org/10.1016/0956-716X(95)00420-Z
  8. N. Souai, N. Bozzolo, L. Naze, Y. Chastel and R. Loge : Scripta Mater., 62 (2010) 851-854 https://doi.org/10.1016/j.scriptamat.2010.02.019
  9. H.U. Hong, I.S. Kim, B.G. Choi, M.Y. Kim and C.Y. Jo : Mater. Sci. Eng. A, 517 (2009), 125-131 https://doi.org/10.1016/j.msea.2009.03.071
  10. H.U. Hong, I.S. Kim, B.G. Choi, Y.S. Yoo and C.Y. Jo : Metall. Mater. Trans. A, 43 (2012), 173-181
  11. H.U. Hong, H.W. Jeong, I.S. Kim, B.G. Choi, Y.S. Yoo and C.Y. Jo, Phil. Mag., 92 (2012), 2809-2825 https://doi.org/10.1080/14786435.2012.676212
  12. H.U. Hong, I.S. Kim, B.G. Choi, C.Y. Jo, Y.S. Yoo, H.W. Jeong and S.M. Seo : US Patent Application Serial No. 12/484,597
  13. H.U. Hong, B.S. Rho and S.W. Nam : Mater. Sci. Eng. A, 318 (2001) 285-292 https://doi.org/10.1016/S0921-5093(01)01254-0
  14. H.W. Jeong, S.M. Seo, H.U. Hong and Y.S. Yoo : J. Appl. Cryst., 43 (2010) 1495-1501 https://doi.org/10.1107/S002188981004149X
  15. V. Randle : Scripta Mater., 54 (2006) 1011-1015 https://doi.org/10.1016/j.scriptamat.2005.11.050
  16. G.S. Rohrer, V. Randle, C.S. Kim and Y. Hu : Acta Mater., 54 (2006) 4489-4502 https://doi.org/10.1016/j.actamat.2006.05.035
  17. D. McLean : Grain Boundaries in Metals, Clarendon Press, Oxford, UK, 1957
  18. L. Karlsson and H. Norden : Acta Metall., 36 (1988) 13-24 https://doi.org/10.1016/0001-6160(88)90024-7
  19. H.U. Hong, I.S. Kim, B.G. Choi, H.W. Jeong, S.M. Seo, Y.S. Yoo and C.Y. Jo : Mater. Sci. Forum, 654-656 (2010) 488-491 https://doi.org/10.4028/www.scientific.net/MSF.654-656.488
  20. W.A. Owczarski : Welding Research Council Bulletin, New York, NY, 1969, 6-9
  21. C.S. Smith : Trans. AIME, 1948, vol. 175, 15-51
  22. D.A. Porter, K.E. Easterling : Phase Transformations in Metals and Alloys, 2nd edition, Chapman & Hall Press, London, UK, 1992, 139-142