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The Effect of Post-Bond Heat Treatment on Tensile Property of Diffusion Bonded Austenitic Alloys

확산 접합된 오스테나이트계 재료의 인장특성에 미치는 후열처리의 영향

Hong, Sunghoon;Kim, Sung Hwan;Jang, Changheui;Sah, Injin
홍성훈;김성환;장창희;사인진

  • Received : 2015.06.13
  • Accepted : 2015.10.14
  • Published : 2015.12.01

Abstract

Diffusion bonding is the key manufacturing process for the micro-channel type heat exchangers. In this study, austenitic alloys such as Alloy 800HT, Alloy 690, and Alloy 600, were diffusion bonded at various temperatures and the tensile properties were measured up to $650^{\circ}C$. Tensile ductility of diffusion bonded Alloy 800HT was significantly lower than that of base metal at all test temperatures. While, for Alloy 690 and Alloy 600, tensile ductility of diffusion bonded specimens was comparable to that of base metals up to $500^{\circ}C$, above which the ductility became lower. The poor ductility of diffusion bonded specimen could have caused by the incomplete grain boundary migration and precipitates along the bond-line. Application of post-bond heat treatment (PBHT) improved the ductility close to that of base metals up to $550^{\circ}C$. Changes in tensile properties were discussed in view of the microstructure in the diffusion-bonded area.

Keywords

Diffusion Bonding;Post-bond Heat Treatment;Austenitic Alloys;Tensile Ductility

References

  1. Chang, Y. I., Finck, P. J. and Grandy, C., 2006, Advanced Burner Test Reactor Preconceptual Design Report," Argonne National Laboratory report ANLABR-1 (ANL-AFCL-173)
  2. Nam, H. Y., Kim, J. B., Lee, J. H. and Park, C. G. 2011, "Concept Development and Review of Current Technical Issues for SFR Steam Generator," Trans. Korean Soc. Mech. Eng. A, Vol. 35, pp.1083-1090
  3. Dostal, V., Driscoll, M.J. and Hejzlar, P., 2004, A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors, MIT Annual and Progress Reports, MIT-ANP-TR-100.
  4. Stephenson, D. J., 1991, Diffusion bonding 2, Elsevier applies science
  5. Bartle, P. M., Houldcroft, P.T., Needham, J.C., Sheldon, E.F., Westagate, S.A., Wilson, J.P., 1979, Diffusion Bonding as a Production Process, The Welding Institute
  6. Zhang, G., Chandel, R. S., Seow, H. P., 2001, "Solid Satate Diffusion Bonding of Inconel 718," Science and Technology of Welding and Joining, Vol. 6, pp. 235-239 https://doi.org/10.1179/136217101101538820
  7. Ravisankar, B., Krichnamoorthi, J., Ramakrishnan, S. S., Angelo, P. C., 2009, "Diffusion Bonding of SU 263," Journal of Materials Processing Technology, Vol 209, pp. 2135-2144 https://doi.org/10.1016/j.jmatprotec.2008.05.015
  8. Sah, I., Kim, D, Lee, H. J., Jang, C., 2013, "The Recovery of Tensile Ductility in Diffusion-Bonded Ni-Base Alloys by Post-Bond Heat Treatments," Materials and Design, Vol, 47, pp. 581-589 https://doi.org/10.1016/j.matdes.2012.12.061
  9. Hong, S., Sah, I., Jang, C., 2014, "Evaluation of High-Temperature Tensile Property of Diffusion Bond of Austenitic Alloys for S-$CO_2$ Cycle Heat Exchangers," Trans. Korean Soc. Mech. Eng. A, Vol. 38, pp. 1421-1426 https://doi.org/10.3795/KSME-A.2014.38.12.1421
  10. Duvall, D. S., Owczarski, W. A., Paulonis, D. F., King, W. H., 1972, "Methods for Diffusion Welding the Superalloy Udimet 700," Welding Research Supplement, pp. 41-49
  11. Jalilian, F., Jahazi, M., Drew, R. A. L., 2006, "Microstructural Evolution during Transient Liquid Phase Bonding of Inconel 617 Using Ni-Si-B Filler Metal," Materials Science and Engineering: A, Vol. 423, pp. 269-281 https://doi.org/10.1016/j.msea.2006.02.030
  12. Basuki, W. W., Kraft, O., Aktaa, J., 2012, "Optimization of Solid-state Diffusion Bonding of Hastelloy C-22 for Microheat Exchanger Applications by Coupling of Experiments and Simulations," Materials Science and Engineering: A, Vol. 538, pp. 340-348. https://doi.org/10.1016/j.msea.2012.01.056

Acknowledgement

Supported by : 미래창조과학부