ORIENTATION DEPENDENCE OF CREEP THERMOACTIVATION PARAMETERSIN Ni3Ge SINGLE CRYSTALS
https://doi.org/10.17073/0368-0797-2014-10-58-61
Abstract
The paper presents the research results of different characteristics of the Ni3Ge alloy possessing L12 structure. The research of single crystals is carried out. Their deformation is oriented along axes [001], [ 39], [ 22] and [ 34]. The activation energies of creep for the investigated orientations are measured. The steady-state creep rate is described by the well-known law dε /dt = K2σn. Values of the steady-state stress exponent, n, are received. Conclusions about possible mechanisms of creep are done. It is shown, that creep of the samples oriented along different axes is carried out by the dislocation processes with different activation energies.
Supporting agencies: The reported study was partially supported by RFBR, research project no. 14-02-92605.
About the Authors
Yu. V. Solov’eva
Tomsk State University of Architecture and Building (2, Solyanaya sqr., Tomsk, 634003, Russia)
Russian Federation
Russian Federation
Dr. Sci. (Phys.-math.), Professor
S. V. Starenchenko
Tomsk State University of Architecture and Building (2, Solyanaya sqr., Tomsk, 634003, Russia)
Russian Federation
Dr. Sci. (Phys.-math.), Professor
Russian Federation
Dr. Sci. (Phys.-math.), Professor
A. N. Solov’ev
Tomsk State University of Architecture and Building (2, Solyanaya sqr., Tomsk, 634003, Russia)
Russian Federation
Russian Federation
Postgraduate
V. A. Starenchenko
Tomsk State University of Architecture and Building (2, Solyanaya sqr., Tomsk, 634003, Russia)
Russian Federation
Russian Federation
Dr. Sci. (Phys.-math.), Professor
References
1. Hemker K.J. A Study of the High-Temperature Deformation of the Intermetallic Alloy Ni3Al. Ph. D. Thesis, Stanford University, Stanford, 1990.
2. Hemker K.J., Nix W.D., Mills M.J. An investigation of the creep of Ni3Al. Acta Metall. Mater. 1991, Vol. 39, no. 8, pp. 1901–1913.
3. Solov’eva Yu.V., Gettinger M.V., Starenchenko S.V., Starenchenko V.A. The creep behavior of single-crystalline Ni3Ge alloys. Russian Physics Journal. 2009, Vol. 52, no. 4, pp. 390–397. (In Russ.).
4. Solov’eva Yu.V., Starenchenko V.A, Starenchenko S.V., Gettinger M.V., Shalygina T.A. Deformation of single-crystalline Ni3Ge alloy oriented towards direction [ 39]. Steel in translation. 2009, no. 12, pp. 1043–1047. (In Russ.).
5. Solov’eva Yu.V., Starenchenko S.V., Gettinger M.V., Starenchenko V.A. Creep curve study of single-crystalline Ni3Ge alloys of different orientation. Izv. vuz. Fizika. 2009, no. 9/2, pp. 98–107. (In Russ.).
6. Solov’eva Yu.V., Starenchenko S.V., Pantyukhova O.D., Starenchenko V.A. Creep investigation of Ni3Ge alloy single crystals oriented along axes [ 34] and [ 22]. Bulletin of the Russian Academy of Sciences: Physics. 2012, Vol. 76, no. 7, pp. 778–781. (In Russ.).
7. Solov’eva Yu.V., Starenchenko S.V., Starenchenko V.A. Intermetal creep with L12 superstructure. Fundamental’nye problemy sovremennogo materialovedeniya. 2009, Vol. 6, no. 3, pp. 41–54. (In Russ.).
8. Solov’eva Yu.V., Starenchenko S.V., Starenchenko V.A. Еffect of the orientation of strain axes on the creep in Ni3Ge alloy single crystals. Bulletin of the Russian Academy of Sciences: Physics. 2011, Vol. 75, no. 2, pp. 202–206. (In Russ.).
9. Kassner M.E., Pe´rez-Prado M.-T. Fundamentals of Creep in Metals and Alloys. Elsevier Ltd., 2004. 267 p.Acknowledgements. The reported study was partially supported by RFBR, research project no. 14-02-92605.
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Review
For citations:
Solov’eva Yu.V., Starenchenko S.V., Solov’ev A.N., Starenchenko V.A. ORIENTATION DEPENDENCE OF CREEP THERMOACTIVATION PARAMETERSIN Ni3Ge SINGLE CRYSTALS. Izvestiya. Ferrous Metallurgy. 2014;57(10):58-61. (In Russ.) https://doi.org/10.17073/0368-0797-2014-10-58-61
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