Abstract
The lattice parameter mismatch between the γ and γ′ phases (γ/γ′ misfit) in single crystals of heat-resistant nickel alloys (HRNAs) ZhS32 and VZhM4 after annealing of varying duration at 900 to 1100°C was studied by X-ray diffraction. It was established that relaxation of coherent stresses in single crystals of HRNAs is accompanied by removal of tetragonal splitting of the matrix (004) γ reflection, and the relaxation dynamics depends on the heat resistance of the single crystal and is determined by the level and duration of temperature exposure. A qualitative change in the profile of the matrix X-ray reflection from the VZhM4 single crystal after long-term annealing at a temperature of 1100°C was revealed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Kablov, E.N., Petrushin, N.V., and Svetlov, I.L., Contemporary Cast Nickel Refractory Alloys, Trudy mezhdunarodnoi nauchno-tekhnicheskoi konferentsii “Nauchnye idei S.T. Kishkina i sovremennoe materialovedenie” (Proc. Int. Sci.-Tech. Conf. ‘Kishkin Scientific Ideas and Contemporary Material Science’), 2006, Moscow: VIAM, pp. 39–55.
Svetlov, I.L., Petrushin, N.V., Kablov, et al., RF Patent no. 2293782, 2007.
Protasova, N.A., Svetlov, I.L., Bronfin, M.B., and Petrushin, N.V., Lattice-Parameter Misfits between the Γ and Γ’ Phases in Single Crystals of Nickel Superalloys, Phys. Met. Metallogr., 2008, vol. 106, pp. 495–502.
Muller, A., Gnaupfel-Herold, Th., and Reimers, W., Small Lattice Mismatches in Highly Imperfect Single Crystals: a Probe into Phase Specific Strains and Stresses, Phys. Status Solidi A, 1997, vol. 159, pp. 375–396.
Yokokawa, T., Osawa, M., Murakami, et al., High Temperature Measurements of the Γ/Γ’ Lattice Misfits in Third Ni-Base Superalloy, Proc. Conf. on Power Engineering, Liege, Belgium, 1989.
Epishin, A.I., Link, T., Bryuknur, U., and Fedelikh, B., Residual Stresses in the Dendritic Structure of Single-Crystal Nickel-Based Superalloys, Phys. Met. Metallogr., 2005, vol. 100, pp. 192–199.
Samoilov, A.I., Ignatova, I.A., Kozlova, V.S., and Krivko, A.I., Determination of Intraphase Stresses in Pseudo-Single-Crystal Structures with Mutual Crystallographic Phase Orientation, Zavod. Lab., 1980, no. 5, pp. 414–418.
Samoilov, A.I., Kablov, E.N., Petrushin, N.V., Nazarkin, R.M., and Moiseeva, N.S., On the Nature of Splitting of Γ Satellites of X-ray Diffraction Reflexes of Refractory Single-Crystal Nickel Alloys, Zavod. Lab., Diagn. Mater., 2010, vol. 76, no. 12, pp. 26–29.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.A. Protasova, I.L. Svetlov, 2012, published in Materialovedenie, 2012, No. 5, pp. 44–50.
Rights and permissions
About this article
Cite this article
Protasova, N.A., Svetlov, I.L. Influence of annealing on the character of structural-phase mismatch in single crystals of heat-resistant nickel alloys. Inorg. Mater. Appl. Res. 4, 29–35 (2013). https://doi.org/10.1134/S2075113313010097
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S2075113313010097