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  • 1
    Electronic Resource
    Electronic Resource
    Substructure formation in high-strength dispersely strengthened alloys (1991)
    Springer
    Russian physics journal 34 (1991), S. 244-252 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Conclusions Analysis of new experimental laws of plastic flow observed in high-strength alloys with dispersional strengthening (such as the formation of substructure with high crystal-lattice curvature, high-temperature localization of deformation from the earliest stages, with reorientation of the localized-shear zones and the adjacent undeformed structural elements) leads to the conclusion that deformational point defects play an important role in the realization of collective deformational modes in the high-strength state. In conditions of high nonequilibrium concentration, deformational point defects, first, permit the inclusion of quasi-viscous diffusional mechanisms of crystal-lattice reorientation by point-defect drift in the local fields of high inhomogeneous stress and, second, by facilitating dislocational deformation mechanisms, may lead to local weakening of the shear zones, localization of the plastic flow, and stability loss, in particular, as a result of mutually consistent autocatalytic defect multiplication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00894928
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  • 2
    Electronic Resource
    Electronic Resource
    Crystal structure of oxides in internally oxidized alloys based on niobium and molybdenum (1982)
    Springer
    Russian physics journal 25 (1982), S. 326-328 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The paper presents the results of investigations on the crystal structure of zirconium and hafnium oxides in internally oxidized niobium and molybdenum alloys. It has been shown that the crystal structure of the oxides in the low-temperature range depends on the particle size. Particles of a size 2r〉20 nm have a monoclinlc lattice, in accordance with the phase diagram. When the particle size is 2r〈4 nm hct modifications of ZrO2 and HfO2 are observed, which is at variance with the phase diagram. In the range 4〈2r〈20 nm previously unknown orthorhombic modifications of the oxides were discovered. The change in the crystal lattice of the oxides as the particle size decreases is due exclusively to scale effects and can be explained by taking account of the contribution of the surface energy to the free energy of the particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00906202
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  • 3
    Electronic Resource
    Electronic Resource
    Change in elemental composition and structural-phase transformations in molybdenum with the high-dose implantation of metal ions (1996)
    Springer
    Russian physics journal 39 (1996), S. 858-866 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A study is made of features of structural-phase transformations that occur in molybdenum during the high-dose implantation of metal ions in a vacuum ∼2·10−4 torr. It is established that ion-stimulated interaction of the surface of the target with elements in the residual gases plays an important role in the modification of the microstructure of the ion-alloyed layer under these conditions. It is shown that such interaction leads to the formation of thin continuous layers of a carbide phase in the surface layer. The continuous layers are in highly nonequilibrium structural-phase states. Experimental data is used as a basis for discussion of the mechanism of this interaction as a function of implantation conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02437105
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