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Microstructure evolution during heat treatment of superalloys loaded with different amounts of carbon

Published online by Cambridge University Press:  26 May 2015

Zhuhuan Yu ,
Junfeng Qiang ,
Jun Zhang  and
Lin Liu
Zhuhuan Yu*
Affiliation:
Material Science and Engineering Department, Xi'an University of Science and Technology, Xi'an 710054, People's Republic of China
Junfeng Qiang
Affiliation:
Material Science and Engineering Department, Xi'an University of Science and Technology, Xi'an 710054, People's Republic of China
Jun Zhang
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
Lin Liu
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The effects of heat treatment for recovering microstructure of a Ni-based single crystal superalloy with carbon addition have been evaluated. The heat treatment resulted in increased levels of chemical homogeneity. All the samples experienced more γ′ coarsening than as-cast samples. Significant changes to as-cast carbide morphologies were observed. Script-type, MC carbide networks transformed during heat treatment to smaller, spherical Ta-rich MC carbides. Heat treatment caused significant MC carbide decomposition and formation of Cr-rich secondary carbides on or near to decomposed carbides in all modifications. The size of carbides after heat treatment was less than that of cast alloy obviously, and the distribution of carbides became more and more dispersion than in cast alloy.

Keywords

heat treatmentsuperalloyscarbon additionsmicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 13 , 14 July 2015 , pp. 2064 - 2072
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Reed, R.C.: The Superalloys: Fundamentals and Applications (Cambridge University Press, Cambridge, 2006); p. 147.CrossRefGoogle Scholar
Shi, Q.Y., Ding, X.F., Wang, M.L., Zheng, Y.R., He, J.P., Tin, S., and Feng, Q.: Co effect on as-cast and heat-treated microstructures in Ru-containing single crystal superalloys. Metall. Mater. Trans. A 45, 1833 (2014).CrossRefGoogle Scholar
Liu, G., Liu, L., Ai, C., Ge, B.M., Zhang, J., and Fu, H.Z.: Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru. J. Alloys Compd. 509, 5866 (2011).CrossRefGoogle Scholar
Berthod, P., Heil, C., and Aranda, L.: Influence of the morphologic evolution of the eutectic carbides at high temperature on the thermal expansion behavior of refractory cast alloys. J. Alloys Compd. 504, 243 (2010).CrossRefGoogle Scholar
Seo, S.M., Jeong, H.W., Ahn, Y.K., Yun, D.W., Lee, J.H., and Yoo, Y.S.: A comparative study of quantitative microsegregation analyses performed during the solidification of the Ni-base superalloy CMSX-10. Mater. Charact. 89, 43 (2014).CrossRefGoogle Scholar
Fuchs, G.E.: Improvement of creep strength of a third generation, single-crystal Ni-base superalloy by solution heat treatment. J. Mater. Eng. Perform. 11(1), 19 (2002).CrossRefGoogle Scholar
Fuchs, G.E.: Solution heat treatment response of a third generation single crystal Ni-base superalloy. Mater. Sci. Eng., A 300, 52 (2001).CrossRefGoogle Scholar
Kramb, R.C., Antony, M.M., and Semiatin, S.L.: Homogenization of a nickel-base superalloy ingot material. Scr. Mater. 54, 1645 (2006).CrossRefGoogle Scholar
Paulo, R.S., Azevedo, E.S., Renato, B., and Carlos, A.N.: Solution heat-treatment of Nb-modified MAR-M247 superalloy. Mater. Charact. 75, 214 (2013).Google Scholar
Lee, H.S., Kim, D.H., Kim, D.S., and Yoo, K.B.: Microstructral changes by heat treatment for single crystal superalloy exposed at high temperature. J. Alloys Compd. 561, 135 (2013).CrossRefGoogle Scholar
Hegde, S.R., Kearsey, R.M., and Beddoes, J.C.: Designing homogenization-solution heat treatments for single crystal superalloys. Mater. Sci. Eng., A 527, 5528 (2010).CrossRefGoogle Scholar
Qiu, C.L., Wu, X.H., Mei, J.F., Andrews, P., and Voice, W.: Influence of heat treatment on microstructure and tensile behavior of a hot isostatically pressed nickel-based superalloy. J. Alloys Compd. 578, 454 (2013).CrossRefGoogle Scholar
Chang, L.T., Sun, W., Cui, Y.Y., Zhang, F.Q., and Yang, R.: Effect of heat treatment on microstructure and mechanical properties of the hot-isostatic-pressed Inconel 718 powder compact. J. Alloys Compd. 590, 227 (2014).CrossRefGoogle Scholar
Yu, J.J., Sun, X.F., Zhao, N.R., Jin, T., Guan, H.R., and Hu, Z.Q.: Effect of heat treatment on microstructure and stress rupture life of DD32 single crystal Ni-base superalloy. Mater. Sci. Eng., A 460, 420 (2007).CrossRefGoogle Scholar
Hzzotte, A., Grosdidier, T., and Denis, S.: Precipitate splitting in nickel-based superalloys: A3-D finite element analysis. Scr. Mater. 34, 601 (1996).CrossRefGoogle Scholar
Al-Jarba, K.A. and Fuchs, G.E.: Effect of carbon additions on the as-cast microstructure and defect formation of a single crystal Ni-based superalloy. Mater. Sci. Eng., A 373, 255 (2004).CrossRefGoogle Scholar
Yu, Z.H. and Liu, L.: Effect of carbon addition on the carbide morphology of single crystal Ni-based superalloy. Trans. Nonferrous Met. Soc. China 24(2), 339 (2014).CrossRefGoogle Scholar
Tin, S. and Pollock, T.M.: Phase instabilities and carbon additions in single-crystal nickel-base superalloys. Mater. Sci. Eng., A 348, 111 (2003).CrossRefGoogle Scholar
Mihalisin, J.R.: Some effects of carbon in the production of single crystal superlloy castings. In Superalloys 2004, TMS: Seven Springs, 2004; p. 795.Google Scholar
Cutler, E.R., Wasson, A.J., and Fuchs, G.E.: Effect of minor alloying aditions on the carbide morphology in a single crystal Ni-base superalloy. Scr. Mater. 58, 146 (2008).CrossRefGoogle Scholar
Cutler, E.R., Wasson, A.J., and Fuchs, G.E.: Effect of minor additions on the solidification of single crystal Ni-base superalloys. J. Cryst. Growth 311, 3753 (2009).CrossRefGoogle Scholar
Safari, J. and Nategh, S.: On the heat treatment of Rene-80 nickel-base superalloy. J. Mater. Process. Technol. 176, 240 (2006).CrossRefGoogle Scholar
Kuo, C.M., Yang, Y.T., Bor, H.Y., and Wei, C.N.: Aging effects on the microstructure and creep behavior of Inconel 718 superalloy. Mater. Sci. Eng., A 510–511, 289 (2009).CrossRefGoogle Scholar
Yu, Z.H., Liu, L., Zhao, X.B., Zhang, W.G., Zhang, J., and Fu, H.Z.. Effect of carbon additions on the microstructure of a single crystal Ni-base superalloy AM3. China Foundry 7, 352 (2010).Google Scholar
Pollock, T.M., Merphy, W.H., Goldman, E.H., and Uyam, D.L.: Grain Defect Formation during directional solidification of nickel base single crystal superalloys. Antolokch, S.D., Stusrud, R.W., Mackay, R.A., eds. Superalloys 1992, Pittsburgh, 1992. Warrendale, PA, TMS, 125 (1992).Google Scholar
Ges, A.M., Fornaro, O., and Palacio, H.A.: Coarsening behavior of a Ni-base superalloy under different heat treatment conditions. Mater. Sci. Eng., A 458, 96 (2007).CrossRefGoogle Scholar
Wasson, A.J. and Fuchs, G.E.: Microstructure evolution of a carbon modified single crystal Ni-base superalloy. Mater. Charact. 74, 11 (2012).CrossRefGoogle Scholar