Effect of Two Different Solutionizing Heat Treatments on the Microstructure of the CMSX-4 Ni-Based Superalloy

Abstract:

The heat-treatment processes for the precipitation-strengthened nickel-based superalloys are extremely complicated. The solution heat treatments are designed to dissolve the gamma-prime and the secondary carbide phases and allow the optimum re-precipitation of these phases upon cooling or after aging, for various precipitation-strengthened superalloys. The study was conducted to examine the effects of two solutionizing heat treatments on the microstructure of the CMSX4 superalloy. A comparison between the two obtained microstructures was performed.

• Periodical: Solid State Phenomena (Volume 246)
• Pages: 15-18
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.246.15
• Online since: February 2016
• Authors: Agnieszka Szczotok*
• Keywords: (γ+γ') Eutectic, CMSX-4, Heat Treatment, Nickel-Based Superalloy

References

[1] P.C. Xia, J.J. Yu, X.F. Sun, H.R. Guan, Z.Q. Hu, Influence of γ' precipitate morphology on the creep property of a directionally solidified nickel-base superalloy, Mater. Sci. Eng. A 476 (2008) 39-45.

DOI: 10.1016/j.msea.2007.04.065

[2] T.M. Pollock, S. Tin, Nickel-based superalloys for advanced turbine engines: chemistry, microstructure and properties, J. Propul. Power 22 (2006) 361-374.

DOI: 10.2514/1.18239

[3] R.C. Reed, T. Tao, N. Warnken, Alloys-by-design: application to nickel-based single crystal superalloys, Acta Mater. 57 (2009) 5898-5913.

DOI: 10.1016/j.actamat.2009.08.018

[4] M.S.A. Karunaratne, D.C. Cox, P. Carter, R.C. Reed, Modeling of the microsegregation in CMSX-4 superalloy and its homogenisation during heat treatment, in: Superalloys 2000, ed. T.M. Pollock at al. TMS, 2000, pp.263-272.

DOI: 10.7449/2000/superalloys_2000_263_272

[5] B.C. Wilson, G.E. Fuchs, The effect of composition, misfit, and heat treatment on the primary creep behavior of single crystal nickel base superalloys PWA 1480 and PWA 1484, in: Superalloys 2008, ed. R.C. Reed at al. Wiley, 2008, pp.149-158.

DOI: 10.7449/2008/superalloys_2008_149_158

[6] N.S. Stoloff, Fundamentals of Strengthening, in: Superalloys II, ed. C. T. Sims, N. S. Stoloff, W.C. Hagel, John Wiley & Sons, New York, NY, (1987), pp.61-96.

DOI: 10.1080/10426919208947432

[7] J.R. Groh, Effect of cooling rate from solution heat treatment on Waspaloy microstructure and properties, in: Superalloys 1992, Proceedings of the International Symposium at Seven Springs Mountain Resort, PA, TMSAIMB, ed. R.D. Kissinger, D.I. Deye, D.L. Anton, A.D. Cetel, M.V. Nathal, T.M. Pollock, D.A. Woodford (1992).

DOI: 10.7449/1996/superalloys_1996_621_626

[8] S.R. Hegde, R.M. Kearsey, J.C. Beddoes, Designing homogenization – solution heat treatments for single crystal superalloys, Mater. Sci. Eng. A 527, 21–22 (2010) 5528-5538.

DOI: 10.1016/j.msea.2010.05.019

[9] G.E. Fuchs, Solution heat treatment response of a third generation single crystal Ni base superalloy, Mater. Sci. Eng. A 300 (2001) 52-60.

DOI: 10.1016/s0921-5093(00)01776-7

[10] S.S.K. Gunturi, D.W. MacLachlan, D.M. Knowles, Anisotropic creep in CMSX-4 in orientations distant from <001>, Mater. Sci. Eng. A289 (2000) 289-298.

DOI: 10.1016/s0921-5093(00)00829-7

[11] Q.Z. Chen, D.M. Knowles, Mechanism of <112>/3 slip initiation and anisotropy of γ' phase in CMSX-4 during creep at 750°C and 750 MPa, Mater. Sci. Eng. A356 (2003) 352-367.

DOI: 10.1016/s0921-5093(03)00148-5

[12] M. Okazaki, T. Hiura, T. Suzuki, Effect of local cellular transformation on fatigue small crack growth in CMSX-4 and CMSX-2 at high temperature, in: Superalloys 2000, ed. T. M Pollock, R.D. Kissinger, R.R. Bowman, K.A. Green, M. McLean, S. Olson, J.J. Schirra, TMS, 2000, pp.505-514.

DOI: 10.7449/2000/superalloys_2000_505_514

[13] A. Szczotok, B. Chmiela, Effect of heat treatment on chemical segregation in CMSX-4 nickel-base superalloy, J. Mater. Eng. Perform. 23/ 8 (2014) 2739-2747.

DOI: 10.1007/s11665-013-0843-1