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  • 1
    Monograph available for loan
    Monograph available for loan
    Alma-Ata : Izdatel'stvo "Nauka" Kazachskoj SSR
    Call number: MOP 46038 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 174 Seiten , Illustrationen , 21 cm
    Language: Russian
    Note: In kyrillischer Schrift
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The results of x-ray study of amorphous metal alloys are compared with the structural parameters of intermediate phases determined for equilibrium state diagrams and primary products of crystallization upon warming of amorphous alloys and crystal phases (formed at “subcritical” cooling rates) of the alloys susceptible to amorphization. It is found that susceptibility of the alloys to amorphization depends on the specific chemical interaction of the components which is revealed in the formation of the intermediate crystal phases. This conclusion is proved by the results of studying solid-phase reaction of amorphization.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. Alloying of Cr-Ni steels with molybdenum (up to 4–5%) leads to additional hardening in the original quenched condition but has almost no effect on hardening during aging of steels not containing cobalt and does not change the character of the redistribution of atoms of alloying elements in the solid solution during aging. 2. The structure of Cr-Ni steel alloyed with molybdenum and cobalt in the quenched condition can be regarded as a heterogeneous solid solution in which the separation of molybdenum atoms occurs to a considerable extent. During subsequent aging the differentiation of atoms of Cr, Mo and atoms of Fe, Co, and Ni continues, and also ordering in sections rich in iron and cobalt.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The optimal heat treatment for LMtsSKA 58-2-2-1-1 brass is oil quenching from 690±10° and subsequent tempering at 300±10° for 4 h. 2. The increase in hardness with quenching is due to the change to the single-phase β condition at a temperature above 680°; the hardening of the structure is associated with the precipitation of lamellar α phase. 3. After heat treatment of LMtsSKA brass under optimal conditions the tensile strength of extruded bars in the longitudinal direction is ≥60 kgf/mm2 and the relative elongation is ≥13%.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Metal science and heat treatment 9 (1967), S. 355-366 
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusion In recent years we have produced new types of age-hardening alloys and new hardening treatments for which the combination of several methods of hardening is typical. We should note first of all the high-nickel and chromium-nickel maraging steels and various methods of thermo-mechanical treatment for age-hardening alloys. In all cases the decomposition processes involve a high density of structural defects. Explanation of the decomposition mechanism in connection with specific types of defects is an urgent problem, the solution of which is already possible with present techniques of electron microscopy (crystallographic analysis of structural defects and new formations is possible with the use of goniometric devices in transmission electron microscopy). Further development of mathematical methods is needed for investigating phase transformations in alloys and refining the quantitative theory of the processes of precipitation and coalescence used for present-day multicomponent alloys and combined treatment. The major problem in this area of metal science is to obtain more complete characteristics of the structure of the material in the state of maximum hardness and establish quantitative relationships between the structural and strength characteristics.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. During low-temperature aging of soft open-hearth steel (killed and boiling) phases of the nitride type are precipitated and the nitrogen in them is partially replaced by carbon. The independent precipitation of carbon and formation of carbide does not occur until 200° or higher. Clearly, cementite is formed because of the low supersaturation. During low-temperature aging of soft steel, the carbon is precipitated as part of the metastable α″-phase Fe16(N, C)2. This phase can be detected in diffraction patterns after aging at 100° for one hour. The properties are affected to the greatest extent by growth of the α″-phase precipitations and its transformation into theγ′-phase. 2. Particles of theγ′-phase Fe4(N, C), may evidently form from oriented precipitated and inter-growing α″-phase particles. The rate at which theγ′-phase is formed during low-temperature aging depends on the preceding heat treatment and on the composition of the steel. The amount of carbon which, as a result of quenching, remains in the solid solution and then becomes part of theα″-phase probably restricts the coherent growth of the particles of this phase and speeds up the transformation.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The change in the crystal structure of the studied intermetallic compounds observed under different extreme actions (quenching from liquid state, ion irradiation, treatment in a ball mill) can be described as a change in the packing of close-packed layers (the formation of packing defects and polytypes in μ-, λ-, and ε-phases) or a change in the atomic ordering (ε, σ, Cr3Si type, andH-phase). 2. The relative stability of the crystalline state of intermetallic phases under high-energy actions is independent of the type of the action and is determined by the crystallochemical nature of the phase.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions The structure of the martensite in steel of the transition type depends on the conditions under which it was produced: when martensite results from treatment at −70°C there is a predominance of plate-like crystals containing twins. Cooling from high temperature tempering, leads to the formation of needle-like crystals alone without any sign of internal twinning. The ultimate strength and the yield strength of martensite formed as the result of treatment at −70° are higher. Stacking defects may be areas of preferential nucleation of martensite crystals and at the same time limit the growth of martensite crystals.
    Type of Medium: Electronic Resource
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