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Influence of thermo-mechanical treatment on the precipitation strengthening behavior of Inconel 740, a Ni-based superalloy

Published online by Cambridge University Press:  27 April 2011

Jun-Hak Oh ,
Byung-Gil Yoo ,
In-Chul Choi ,
Michael L. Santella  and
Jae-il Jang
Jun-Hak Oh
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
Byung-Gil Yoo
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
In-Chul Choi
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
Michael L. Santella
Affiliation:
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
Jae-il Jang*
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

In this work, we have systematically explored the influence of thermo-mechanical treatment on the precipitation behavior and its strengthening in Inconel 740, a relatively new Ni-based superalloy, using specimens on which different levels of stresses were applied at 700 °C. With increasing applied stress, fraction of gamma prime precipitates increased (without significant size change) and nanoindentation hardness was enhanced. The stress effects were discussed in terms of the free energy barrier for heterogeneous nucleation and the prevailing mechanisms of precipitation strengthening.

Keywords

StrengthNanoindentationNi
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 10 , 28 May 2011 , pp. 1253 - 1259
Copyright
Copyright © Materials Research Society 2011

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References

REFERENCES

1.Zhao, S., Xie, X., Smith, G.D., and Patel, S.J.: Microstructural stability and mechanical properties of a new nickel-based superalloy. Mater. Sci. Eng. A 355, 96 (2003).CrossRefGoogle Scholar
2.Evans, N.D., Maziasz, P.J., Swindeman, R.W., and Smith, G.D.: Microstructure and phase stability in INCONEL alloy 740 during creep. Scr. Mater. 51, 503 (2004).CrossRefGoogle Scholar
3.King, J.E.: Fatigue-crack propagation in nickel-base superalloys—effects of microstructure, load ratio, and temperature. Mater. Sci. Technol. 3, 750 (1987).CrossRefGoogle Scholar
4.Reppich, B., Schepp, P., and Wehner, G.: Some new aspects concerning particle hardening mechanism in γ′ precipitating Ni-Base alloys—II. Experiments. Acta Metall. 30, 95 (1982).CrossRefGoogle Scholar
5.Gopalan, P., Rajaaman, R., Viswanathan, B., Gopinathan, K.P., and Venkadesan, S.: The kinetics of formation and growth of TIC precipitates in Ti-modified stainless steel studied by positron annihilation spectroscopy. J. Nucl. Mater. 256, 229 (1998).CrossRefGoogle Scholar
6.Reppich, B.: Some new aspects concerning particle hardening mechanism in γ′ precipitating Ni-Base alloys—I. Theoretical concept. Acta Metall. 30, 87 (1982).CrossRefGoogle Scholar
7.Nembach, E., Suzuki, K., Ichihara, M., and Takeuchi, S.: In situ deformation of the γ′ hardened superalloy Nimonic-PE16 in high-voltage electron-microscopes. Philos. Mag. 51A, 607 (1985).CrossRefGoogle Scholar
8.Nembach, E.: Particle Strengthening of Metals and Alloys (John Willey and Sons, New York, 1996).Google Scholar
9.Brown, L.M. and Ham, R.K.: Strengthening Methods in Crystals, edited by Kelly, K. and Nicholson, R.B. (Applied Science, London, 1971), p. 12.Google Scholar
10.Huther, W. and Reppich, B.: Interaction of dislocations with coherent, stress-free, ordered precipitates. Z. Metallk. 69, 628 (1978).Google Scholar
11.Oliver, W.C. and Pharr, G.M.: An improved technique for determining hardness and elastic-modulus using load and displacement sensing indentation experiments. J. Mater. Res. 7, 1564 (1992).CrossRefGoogle Scholar
12.Porter, D.A. and Eastering, K.E.: Phase Transformations in Metals and Alloys (Taylor & Francis Group, New York, 2004).Google Scholar
13.Sauthoff, G.: Influence of stress on precipitation. J. De Phy. IV 6, 87 (1997).Google Scholar
14.Kesternich, W.: Microstructural evolution and mechanical-properties of advanced high-temperature steel. J. Nucl. Mater. 155, 1025 (1988).CrossRefGoogle Scholar
15.Cahn, J.W.: Nucleation on dislocations. Acta Metall. 5, 169 (1957).CrossRefGoogle Scholar
16.Dutta, B., Palmiere, E.J., and Sellars, C.M.: Modelling the kinetics of strain induced precipitation in Nb microalloyed steels. Acta Mater. 49, 785 (2001).CrossRefGoogle Scholar
17.Kim, J.-H., Baek, J.-H., Han, C.-H., Kim, S.-H., Lee, C.-B., Na, K.-S., and Kim, S.-J.: Effect of thermomechanical process on mechanical property and microstructure of 9Cr-1Mo steel. J. Korean. Inst. Met. Mater. 47, 621 (2009).Google Scholar
18.Nix, W.D. and Gao, H.: Indentation size effects in crystalline materials: A law for strain gradient plasticity. J. Mech. Phys. Solids 46, 411 (1998).CrossRefGoogle Scholar
19.Jackson, M.P. and Reed, R.C.: Heat treatment of UDIMET 720Li: The effect of microstructure on properties. Mater. Sci. Eng. A 259, 85 (1999).CrossRefGoogle Scholar
20.Pretorius, T. and Nembach, E.: Strengthening of an L12-ordered γ′ intermetallic by disordered γ-particles. Part I: Computer simulations. Acta Mater. 49, 1971 (2001).CrossRefGoogle Scholar
21.Mohles, V.: The critical resolved shear stress of single crystals with long-range ordered precipitates calculated by dislocation dynamic simulations. Mater. Sci. Eng. A 365, 144 (2004).CrossRefGoogle Scholar
22.Rao, S.I., Parthasarathy, T.A., Dimiduk, D.M., and Hazzledine, P.M.: Discrete dislocation simulations of precipitation hardening in superalloys. Philos. Mag. 84, 3195 (2004).CrossRefGoogle Scholar
23.Brown, L.: The self-stress of dislocations and the shape of extended nodes. Philos. Mag. 10, 441 (1964).CrossRefGoogle Scholar
24.Kocks, U.F.: The theory of an obstacle-controlled yield strength. Mater. Sci. Eng. 27, 291 (1977).CrossRefGoogle Scholar
25.Orowan, E.: Symposium on International Stresses (Inst. of Metal. London, 1947).Google Scholar
26.Tabor, D.: The Hardness of Metals (Clarendon Press, Oxford, 1951).Google Scholar