Abstract
The shear‐stress distribution produced by distortion of Ni3Ge single crystals under compression is studied. The evolution of the dislocation structure during deformation of Ni3Ge single crystals of various orientations ([2¯34], [1¯11]$, [1¯39], and [001]) at T = 77, 293, 523, 673, and 873 K is analyzed. It was found that, up to failure strains, the dislocation structure is characterized by a uniform dislocation distribution. Regardless of the strain‐axis orientation, the linear relation τ = f(ρ0.5) is valid for all the test temperatures except for T = 77 K. The deviation from the linear relation at T = 77 K is due to the suppressed thermally activated slip of dislocations in nonuniform‐strain fragments at the specimen edges. In these fragments, the shear stresses are substantially reduced, and hence, the stresses produced by the dislocation cluster retard the development of slip in this trace.
Similar content being viewed by others
REFERENCES
Yu. A. Abzaev, Yu. V. Solov'eva, È. V. Kozlov, et al., "Calculation of shear stresses in single crystals of the Ni3Ge alloy," Izv. Vyssh. Uchebn. Zaved., Fiz., No. 6, 48-53 (1995).
Yu. A. Abzaev, V. A. Starenchenko, Yu. V. Solov'eva, et al., "Analysis of fragmentation of deformation in Ni3Ge single crystals," J. Appl. Mech. Tech. Phys., 39, No. 1, 135-139 (1998).
Yu. A. Abzaev, V. A. Starenchenko, N. A. Koneva, and É. V. Kozlov, "Evolution of the dislocation structure and hardening mechanisms of Ni3Ge single crystals oriented for multiple slip," Izv. Vyssh. Uchebn. Zaved., Fiz., No. 3, 65-70 (1987).
V. A. Starenchenko, Yu. A. Abzaev, and N. A. Koneva, "Stability loss of uniform plastic strain of Ni3Ge single crystals," Fiz. Met. Metalloved., 64, No. 6, 1178-1182 (1987).
V. A. Starenchenko, Yu. A. Abzaev, N. A. Koneva, and È. V. Kozlov, "Thermal hardening and evolution of the dislocation structure of Ni3Ge single crystals," Fiz. Met. Metalloved., 68, No. 3, 595-601 (1989).
V. A. Starenchenko and Yu. A. Abzaev, "Temperature dependence of parameters of interdislocation interaction in Ni3Ge single crystals," Metallofizika, No. 2, 131-136 (1991).
V. A. Starenchenko, Yu. A. Abzaev, Yu. V. Solov'eva, and É. V. Kozlov, "Thermal hardening of Ni3Ge single crystals," Fiz. Met. Metalloved., 79, No. 1, 147-155 (1995).
V. A. Starenchenko, Yu. V. Solov'eva, Yu. A. Abzaev, and B. I. Smirnov, "Orientation dependence of thermal hardening of single crystals of the Ni3Ge alloy," Fiz. Tverd. Tela, No. 38, 3050-3058 (1996).
V. A. Starenchenko, Yu. V. Solov'eva, Yu. A. Abzaev, et al., "Evolution of the dislocation structure during deformation of Ni3Ge single crystals of various orientations," Fiz. Tverd. Tela, 40, No. 4, 81-89 (1998).
V. A. Starenchenko, Yu. V. Solov'eva, and Yu. A. Abzaev, "Accumulation of dislocations and thermal hardening in alloys with an L12 superstructure," Fiz. Tverd. Tela, 41, No. 3, 454-460 (1999).
J. N. Lomer and H. M. Rozenberg, "The detection of dislocation by the temperature heat conductivity measurements," Philos. Mag., 4, No. 340, 467-483 (1959).
R. W. K. Honeycombe, The Plastic Deformation of Metals, Edward Arnold, London (1968).
J. Weertman and J. Wirtman, in: R. W. Cahn (ed.), Physical Metallurgy, North-Holland, Amsterdam (1956).
L. I. Mirkin, Physical Fundamentals of Strength and Plasticity [in Russian], Izd. Mosk. Univ., Moscow (1968).
D. McLean, Mechanical Properties of Metals John Wiley and Sons, New York-London (1962).
H. G. van Bueren, Imperfections in Crystals, North-Holland, Amsterdam (1960).
J. Fridel, Dislocations, Pergamon Press, Oxford (1964).
N. A. Koneva, L. A. Teplyakova, È. V. Kozlov, "Nature of hardening of ordered alloys with an L12 superstructure," in: Structure and Plastic Behavior of Alloys [in Russian], Izd. Tomsk. Univ., Tomsk (1983), pp. 74-99.
N. A. Koneva and É. V. Kozlov, "Nature of substructural hardening," Izv. Vyssh. Uchebn. Zaved., Fiz., No. 8, 3-14 (1982).
N. A. Koneva and É. V. Kozlov, "Special features of substructural hardening," Izv. Vyssh. Uchebn. Zaved., Fiz., No. 3, 56-70 (1991).
G. I. Taylor, "The mechanism of plastic deformation of crystals. Part 1. Theoretical," in: Proc. Roy. Soc. London, Ser. A, 145 (1934), pp. 362-387.
N. F. Mott, "The work hardening of metals," Trans. AIME, No. 6, 962-968 (1960).
A. Seeger, J. Diehl, S. Mader, and H. Rebstock, "Workhardening and worksoftening of face-centered cubic metal crystals," Philos. Mag., 2, No. 15, 323-350 (1957).
H.-R. Pak, T. Saburi, and S. Nenno, "The effect on the temperature dependence of yield stress in Ni3Ge single crystals," Trans. Jpn. Inst. Metals, 19, No. 1, 35-42 (1978).
A. A. Predvoditelev, "Possible ways to construct the hardening theory based on tests on dislocations," in: Physics of Deformation Hardening of Single Crystals [in Russian], Naukova Dumka, Kiev (1972), pp. 74-94.
L. J. Segerlind, Applied Finite Element Analysis, John Wiley and Sons, New York (1976).
L. D. Landau and E. M. Lifshitz, Theory of Elasticity, Pergamon Press, Oxford (1986).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Abzaev, Y.A., Starenchenko, V.A. Stress Distribution in a Slip Trace of Deformed Ni3Ge Single Crystals. Journal of Applied Mechanics and Technical Physics 44, 114–121 (2003). https://doi.org/10.1023/A:1021794116757
Issue Date:
DOI: https://doi.org/10.1023/A:1021794116757