Abstract
The hot deformation behavior of IN690 superalloy was characterized in a temperature range of 1273–1473 K and a strain rate range of 0.01–10 s−1 using uniaxial compression tests on process annealed material. The constitutive relations between flow stress and effective strain, effective strain rate as well as deformation temperature were studied. It can be concluded that the flow stress significantly reduces with the deformation temperature of IN690 superalloy increasing. Whereas, there is a significant increase of flow stress when the strain rate increases from 0.1 s−1 to 10 s−1. Based on the hyperbolic-sine Arrhenius-type equation, a constitutive equation considering compensation of strain was developed. The activation energy and the material constants (Q, n and ln A) decrease as the deformation strain increases. The strain dependent term is successfully incorporated in the constitutive equation through a quartic equation. A good agreement between the experimental data and the predicted results has been achieved, indicating that the proposed constitutive equation and the methods of determing the material constants are suitable to model the high temperature deformation behavior of IN690 superalloy.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Gonzalez-Rodriguez J.G., Casales M., Espinoza-Medina M. A., Angeles-Chavez C., Izquierdo G., and Guardian R., Microstructural evolution of alloy 690 during sensitization at 700°C, Mater Charact., 2003, 51(5): 309.
Kim H.P., Hwang S.S., Lim Y.S., Kuk, I.H., and Kim J.S., Effect of heat treatment and chemical composition on caustic stress corrosion cracking of Alloy 600 and Alloy 690, Key Eng. Mater., 2000, 183–187: 707.
Lu B.T., Luo J.L., Peng B., Palani A., and Lu Y.C., Condition for lead-induced corrosion of alloy 690 in an alkaline steam generator crevice solution, Corrosion, 2009, 65(9): 601.
Lumsden J. and Mcilree A., Factors affecting PBSCC in alloy 600 and alloy 690 steam generator tubing, [in] Proceedings of 13th International Conference on Environmental Degradation of Materials in Nuclear Power Systems, Whistler, 2007: 1990.
Dwivedi S.N. and Balakrishnan R., Development of constitutive equations and processing maps for Inconel 718, [in] Proceedings of Winter Annual Meeting of the American Society of Mechanical Engineers: Volume 21, Dallas, 1990: 99
Dwivedi S.N. and Balakrishnan R., Development of constitutive equations and processing maps for Al 2024, [in] Proceedings of Winter Annual Meeting of the American Society of Mechanical Engineers: Volume 20, Dallas, 1990: 303.
Pu Z.J., Wu K.H., Shi J., and Zou D., Development of constitutive relationships for the hot deformation of boron microalloying TiAl-Cr-V alloys, Mater. Sci. Eng., A., 1995, 192–193: 780.
Rao K.P. and Hawbolt E.B., Development of constitutive relationships using compression testing of a medium carbon steel, J. Eng. Mater. Technol. Trans. ASME, 1992, 114(1): 116.
Cabrera E.S.P, A Constitutive description of aluminum-1% magnesium alloy deformed under hot-working conditions, J. Eng. Mater. Technol. Trans. ASME, 2001, 123(3): 301.
Liu D., Yang Y.H., Geng J., and Luo Z.J., Constitutive relationship of IN718 alloy for thermoviscoplastic and microstructure evolution coupled analysis, Acta Metall. Sin. Engl. Lett., 2007, 20(5): 373.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sun, C., Liu, J., Li, R. et al. Constitutive relationship of IN690 superalloy by using uniaxial compression tests. Rare Metals 30, 81–86 (2011). https://doi.org/10.1007/s12598-011-0202-z
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12598-011-0202-z