DOI QR코드

DOI QR Code

Transient Liquid Phase Bonding of Gamma Prime Precipitation Strengthened Ni Based Superalloy

석출강화형 Ni 기 초내열합금의 천이액상확산접합

  • Kim, Jeong Kil (Advanced Process Development Team, Doosan Heavy Industries & Construction) ;
  • Park, Hae Ji (Advanced Process Development Team, Doosan Heavy Industries & Construction) ;
  • Shim, Deog Nam (Advanced Process Development Team, Doosan Heavy Industries & Construction)
  • 김정길 (두산중공업 신공정기술개발팀) ;
  • 박해지 (두산중공업 신공정기술개발팀) ;
  • 심덕남 (두산중공업 신공정기술개발팀)
  • Received : 2017.02.03
  • Accepted : 2017.03.21
  • Published : 2017.06.30

Abstract

Transient liquid phase (TLP) bonding is essential technology to repair micro-cracking on the airfoil of blades and vanes for gas turbines. Understanding of the characteristics of TLP bonding of the superalloys is necessary in the application of the technology for repairing these components. In this study, the focus was on investigating TLP bonding characteristics of ${\gamma}^{\prime}$ precipitation strengthened Ni based superalloy. TLP bonding was carried out with an amorphous filler metal in various bonding conditions, and the microstructural characterization was investigated through optical microscopy (OM) and electron probe micro-analysis (EPMA). The experimantal results explained clearly that bonding temperatures had critical effects on the TLP bonding behaviors, and that isothermal solidication of the joints made at higher temperatures than $1170^{\circ}C$ was controlled by Ti diffusion instead of B.

Keywords

References

  1. K.Maile, Qualification of Ni-based alloys for advanced ultra-supercritical plant, Pro. Eng. 55 (2013), 214-220 https://doi.org/10.1016/j.proeng.2013.03.245
  2. K.N.Song, S.D.Hong, D.S.Ro, J.H.Lee and J.H. Hong, Measurement of weld material properties of alloy 617 using an instrumented indentation technique, J. Weld. Join. 31 (2013), 41-46 https://doi.org/10.5781/KWJS.2013.31.5.41
  3. G.Maier, O. Hubsch, I.H. Riede, C. Somsen, J. Klower and R. Mohrmann, Cyclic plasticity and lifetime of the nickel-based Alloy C-263, Experiments, models and component simulation, MATEC Web of Conferences 14 (2014)
  4. R.C. Reed, The superalloys, Cambridge Univ. Press (2006)
  5. Y.H.Yang, Y.J.Xie, M.S.Wang andW.Ye, Microstructure and tensile properties of nickel-based superalloy K417G bonded using transient liquid-phase infiltration, Mater. Des. 51 (2013)141-147 https://doi.org/10.1016/j.matdes.2013.04.024
  6. O.A.Idowu, N.L.Richards and M.C.Chaturvedi, Effect of bonding temperature on isothermal solidification rate during transient liquid phase bonding of Inconel 738LC superalloy, Mater. Sci. Eng. A 397 (2005), 98-112 https://doi.org/10.1016/j.msea.2005.01.055
  7. C.Y.Kang andM.S.Kwon, TLP bonding of directionaaly solidified Ni base superalloy GTD-111, J. Weld. Join., 21 (2003) 212-218
  8. M.. Pouranvari, A. Ekrami and A. H. .Kokabi, Effect of bonding temperature on microstructure development during TLP bonding of a nickel base superalloy, J. Alloys and Comounds, 469 (2009), 270-275 https://doi.org/10.1016/j.jallcom.2008.01.101
  9. V.Jalilvand, H.Omidvar, M.R.Rahimipour andH.R.Shakeri, Influence of bonding variables on transient liquid phase bonding behavior of nickel based superalloy IN-738LC, Mater. Des. 52 (2013), 36-46 https://doi.org/10.1016/j.matdes.2013.05.042
  10. V.Jalilvand, H.Omidvar, H.R.Shakeri andM.R.Rahimipour, Microstructural evolution during transient liquid phase bonding of Inconel 738LC using AMS 4777 filler alloy, Mater. Charact. 75 (2013), 20-28 https://doi.org/10.1016/j.matchar.2012.10.004
  11. A.Ghoneim, O.A.Ojo, Microstructure and mechanical response of transient liquid phase joint in Haynes 282 superalloy, Mater. Charac. 62 (2011), 1-7 https://doi.org/10.1016/j.matchar.2010.09.011
  12. J. K. Kim, H. J. Park and D. N. Shim, Effects of Post Weld Heat Treatment on Microstructures of Alloy 617 and 263 Welds for Turbines of HSC Power Plants, J. of Welding and Joining, 34 (3) (2016), 52-60 (in Korean) https://doi.org/10.5781/JWJ.2016.34.3.52
  13. J. K. Kim, H. J. Park and D. N. Shim, Effects of PWHT on Microstructure and Mechanical Properties of Weld Metals of Ni-Based Superalloy 617 and 263 for Hyper- Supercritical Power Plants, Acta Metall. Sin. (Engl. Lett.) 29 (12) (2016) 1107-1118 https://doi.org/10.1007/s40195-016-0494-y
  14. M.Pouranvari andA.Ekrami, A.H.Kokabi, Effect of bonding temperature on microstructure development during TLP bonding of a nickel base superalloy, J. Alloys and Comounds, 469 (2009), 270-275 https://doi.org/10.1016/j.jallcom.2008.01.101
  15. D.U.Kim andK.Nishimoto, Bonding phenomena of transient liquid phase bonded joints of a Ni base single crystal superalloy, Met. Mater. Int. 8 (2002) 403-410 https://doi.org/10.1007/BF03186114
  16. B.K.Lee, Development of the base metal-like insert metals for TLP bonding with directional solidified Ni-base superalloy GTD-111, doctoral dissertation (2010)
  17. J.Cao, Y.F.Wang, X.G.Song, C.Li and J.C. Feng, Effects of post-weld heat treatment on microstructure and mechanical properties of TLP bonded Inconel718 superalloy, Mater. Sci. Eng. A, 590 (2014), 1-6 https://doi.org/10.1016/j.msea.2013.10.013
  18. M.Pouranvari, A.Ekrami and A.H.Kokabi, Microstructure development during transient liquid phase bonding of GTD-111 nickel-based superalloy, J. Alloys and Comounds, 641 (2008), 641-647
  19. M.Pouranvari, A.Ekrami, A.H.Kokabi andH.N.Han, Microstructural characteristics of a cast IN718 superalloy bondedby isothermal solidification, Met. Mater. Int. 19 (2013), 1091-1099 https://doi.org/10.1007/s12540-013-5026-y
  20. D.U. Kim, The effect of base metal grain boundary on isothermal solidification phenomena during TLP bonding of Ni base superalloys, Journal of KWJS, 19 (3) (2001), 326-333 (in Korean)