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  • 1970-1974  (10)
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Publisher
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Temperature dependence of the mechanical properties of Cu-Ti and Cu-Ti-Al alloys (1970)
    Springer
    Russian physics journal 13 (1970), S. 511-516 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A study has been made of the temperature dependence of the mechanical properties and mechanical twinning of the alloys Cu + 4.3% Ti (I) and Cu + 2.3% Ti + 2% Al (II) in the single-phase state and in a state with a developed modulated structure. A correlation is found between the σε(T) dependence and the development of mechanical twinning in the range 90–673 °K. The temperature dependence of the strength of the alloy Cu + 2.3% Ti + 5% Al containing incoherent stable-phase inclusions was studied. The experimental σ(T) dependence is compared with the theoretical dependence, and the activation energy and volume of plastic flow are determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00822609
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  • 2
    Electronic Resource
    Electronic Resource
    Discontinuous decomposition in quenched and deformed alloys (1970)
    Springer
    Russian physics journal 13 (1970), S. 85-89 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Discontinuous decomposition in quenched and deformed samples of the alloy Cu + 4.3% Ti has been studied by optical metallography and by electron metallography (with replicas and thin foils). The structure of the discontinuous-decomposition regions changes markedly during the continuous metastable decomposition in the matrix. Cells are nucleated within grains in the deformed samples at recrystallization nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00817229
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  • 3
    Electronic Resource
    Electronic Resource
    Precipitation hardening of alloys with structure modulated within the region of micro- and macroflow. I (1972)
    Springer
    Russian physics journal 15 (1972), S. 1274-1280 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of precipitation of phase Co3Ti on the change in mechanical properties, measured within the range of micro (ɛ ∼- 10§-1), and macroflow (ɛ = 10−3) was studied at various stages of decomposition of the Co-Ni-Ti and Co-Ni- Ti-Al alloys. It was shown that in the region of microdeformation, a parabolic dependence σ(ɛ) is observed, and the dependence of resistance to deformation on the grain size is expressed by Petch equation. It was shown that theoretical estimations with the use of Gerold -Haberkorn and Gleiter-Hornbogen theories are in agreement with the experimentally observed changes in macroscopic yield stress during the process of precipitation of Co3Ti phase in the studied alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901518
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  • 4
    Electronic Resource
    Electronic Resource
    Temperature dependence of resistance to micro- and macrodeformation in precipitation-hardening Co-Ni-Ti and Co-Ni-Ti-Al alloys. II (1972)
    Springer
    Russian physics journal 15 (1972), S. 1281-1285 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature dependence of mechanical properties σ(T) in the region of micro- and macroformations (ɛ ∼- 10−6-10−3) of the Co-Ni-Ti, and Co-Ni-Ti-Al alloys was studied in various structural states. It was shown that precipitation of Co3Ti phase in the alloy being investigated does not determine the anomalous temperature dependence σ(T) similar to that observed in various alloys with precipitation of Ni3Al phase. Experimental data obtained indicated that temperature dependence of macroscopic yield point is determined by the dependence of the resistance to the onset of plastic flow on temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901519
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  • 5
    Electronic Resource
    Electronic Resource
    Temperature dependence of the yield stress of a cobalt-nickel-titanium alloy (1974)
    Springer
    Russian physics journal 17 (1974), S. 608-612 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature dependence of the yield stress of a Co-Ni-Ti alloy was studied between −196 and +400
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00894787
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  • 6
    Electronic Resource
    Electronic Resource
    Investigation of decomposition processes in alloy Cu-Ge-Ti (1974)
    Springer
    Russian physics journal 17 (1974), S. 983-987 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The process of the decomposition of alloy Cu-6 at.% Ge-2.8 at.% Ti in the 400–700°C temperature range was investigated by transmission electron microscopic methods and by a study of the kinetics of the change of electrical resistance. After quenching in water decomposition at 500–600° occurs in two stages. In the first stage the coherent phase precipitates as lamellae with habit plane 100. The second stage is associated with the occurrence of semicoherent lamellae of the same phase. The effect of hardening conditions of the character of decomposition is investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00891072
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of vacancies on nucleation of a new phase in copper-base alloys (1974)
    Springer
    Russian physics journal 17 (1974), S. 988-991 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of hardening conditions on the decomposition of alloys Cu-Al-Co was investigated by studying the kinetics of the change of electrical resistance, measuring the paramagnetic susceptibility, and by transmission microscopy. The data obtained indicated a considerable effect of hardening vacancies on the process of nucleation of the stable phase (CoAl). It is shown that nucleation of phase CoAl occurs on vacancion clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00891073
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  • 8
    Electronic Resource
    Electronic Resource
    Some regularities of the fracture of ordered alloys based on Ni3Fe (1971)
    Springer
    Russian physics journal 14 (1971), S. 745-750 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some regularities of the fracture of ordered polycrystals of the alloys Ni3Fe, Ni3(FeMn), Ni3FeAl), Ni3(FeCr), Ni3(FeCr) are studied. The alloys Ni3Fe, Ni3(FeMn), and Ni3(FeAl) possess low plasticity in the ordered state at the test temperatures T 〈 100 °C. In the 100–200 ° C temperature range a “brittleness-viscosity” transition is detected which is analogous to that observed in body centered cubic (BCC) metals and alloys. The transition from the brittle into the plastic state is not accompanied by a change in the metallographic picture of slip. The distinguishing peculiarity of the strain at elevated temperatures is the significant displacement of the grains along the boundaries. The temperature band of the transition from the brittle into the plastic state of ordered alloys in the tempered state (tempering from a temperature below the temperature of the order-disorder transformation) is observed at tempering temperatures above 450 °C (tests at room temperature). The results obtained permit the assumption that a reduction in the plasticity in ordering alloys based on Ni3Fe is caused by segregation of the impurities along the grain boundaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00822163
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  • 9
    Electronic Resource
    Electronic Resource
    Morphology and decay kinetics of Co-Ni-Ti alloys (1972)
    Springer
    Russian physics journal 15 (1972), S. 1791-1797 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effects of small-angle diffuse modulated-structure electron scattering in Co-Ni-Ti alloys are studied. It is shown that elastic atomic-plane displacement plays a determining role in satellite formation on electron-diffraction patterns. It is also shown that in the early disintegration stages in Co-Ni-Ti alloys, the new-phase particles are equiaxial and randomly disposed. At later stages, a transition to one-dimensionally periodic modulated structure is observed. The time dependence of modulation period and particle size is described by the Lifshits-Slezov-Vagner equation. The coagulation-activation energy determined from kinetics curves is Q=64 kcal/mole. It is concluded that volume diffusion controls particle coarsening.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00893086
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  • 10
    Electronic Resource
    Electronic Resource
    On the nature of the dispersion hardening of Cu-Al-Co alloys (1974)
    Springer
    Russian physics journal 17 (1974), S. 363-368 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The authors describe an investigation into the mechanism of strain hardening of Cu-8 at. % Al-2 at. % Co alloy strengthened by particles of the intermetallic compound CoAl. They show that within the range 77–573°K the temperature dependence of the yield point is determined by the temperature dependence of the shear modulus. At T 〉 573°K the reverse processes gain in importance and cause a sharp decrease in the coefficient of strain-hardening and a loss of plasticity. The investigation of the Bauschinger effect and its reversal showed that distant stresses, generated by Orowan loops, have a considerable effect on the strain-hardening process. The reversal processes and an increase in test temperature produced no qualitative change in the dislocation pattern.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00893954
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