Summary
-
1.
In tests at room temperature, the deformation resistance of sintered alloys of nickel with up to 5% aluminum oxide, prepared by high-temperature sintering, differs only slightly from that of sintered nickel. It shows a certain increase with increasing oxide concentration, as well as when α-Al2O3 is used instead ofγ-Al2O3.
At this temperature, the superiority of sintered nickel-aluminum oxide alloys over sintered nickel is more pronounced at small degrees of deformation.
-
2.
As test temperature is raised, the difference in the deformation resistance of nickel with and without aluminum oxide additions becomes greater. At a test temperature of 500°C, the part played by the particle size of the oxide in alloy strengthening sharply increases; the influence of the oxide modification becomes even stronger.
-
3.
The hardness of sintered Ni-A12O3 alloys after deformation and high-temperature annealing remains higher than that of oxide-free nickel subjected to the same treatment. At the same time, the hardness level rises with increasing concentration and decreasing particle size of the oxide.
The maximum hardness loss temperature is the same for sintered alloys containingγ-Al2O3 as for sintered nickel, but rises when α-Al2O3 is added to nickel.
-
4.
Sintered alloys of nickel with the α-modification of aluminum oxide are superior both in respect to deformation resistance at room and elevated tempe ratures, and temperature stability of strain distortions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
L. Bonis and N. J. Grant, Trans. Met. Soc. AIME,218, N 5, 877 (1960).
K. M. Zwilsky and N. J. Grant, Metal. Progr., 80, N 2, 108 (1961).
K. C. Nelson, K. M. Zwilsky, and N. J. Grant, Evaluation of ultrafine metal powders for dispersion- hardening purposes (1961).
M. F. Grinwade and K. Jackson, Powder Metallurgy, N 10, 13 (1962).
L. Bonis and N. J. Grant, Trans. Met. Soc. AIME, 224, 308 (1962).
N. H. Lewis, R. H. Suborn, and I. W. Martin, Powder Metallurgy, N 10, 87 (1962).
J. Smith, Powder Metallurgy, N 11, (1963).
P. Royen and W. Sterrel, Ber. Bumsengres Phys., 67, N 7, 716 (1963).
E. Orowan, Z. Metalls, 51 (1948).
F. V. Lenel and J. S. Ansell, Powder Metallurgy, New York-London, 267–304 (1961).
J. Fisher, E. Hart, and R. Pray, Act Met., 1, 336 (1953).
L. N. Larikov, Collection: Physical Principles of Metal Strength and Plasticity [in Russian], Moscow (1963), p. 255.
Jatti, Powder Metallurgy, N 10, 7786 (1962).
V. V. Grigor'eva and V. M. Sergeenkova, Poroshkovaya Met., 6 (1963).
J. A. Drowsky, F. V. Lenel, and J. S. Ansell, Trans. Met. Soc. AIME, 224, N 2, 236 (1962).
R. Murphy and N. Grant, J. Powder Metall., N 10, 1–12 (1962).
V. V. Grigor'eva and V. M. Sergeenkova, Transactions of the Eighth All-Union Scientific and Technical Conference on Powder Metallurgy [in Russian], Erevan (1964), p. 220.
K. V. Savitskii, V. N. Zhdanova, A. P. Savitskii, and V. A. Kulikov, Collection: Studies of Heat Resistivity Alloys [in Russian], Moscow, Acad. Sci. USSR Press, (1962), Vol. 9, p. 110 (discussion).
S. I. Lebedeva, Determination of the Microhardness of Minerals [in Russian], Moscow (1963).
L. H. Cottrell, Dislocations and Plastic Flow in Crystals [Russian translation], Metallurgizdat (1958).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Grigor'eva, V.V., Savitskii, K.V., Zhdanova, V.N. et al. The deformation resistance and stability of strain distortions of sintered alloys. Powder Metall Met Ceram 4, 758–764 (1965). https://doi.org/10.1007/BF00774227
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00774227