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  • 1
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    Calculation of cooling and heating rates and transformation curves for the preparation of metallic glasses (1981)
    Springer
    Details
    Publication Date: 1981-07-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 2
    Electronic Resource
    Electronic Resource
    Calculation of cooling and heating rates and transformation curves for the preparation of metallic glasses (1981)
    Springer
    Journal of materials science 16 (1981), S. 1935-1944 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A Fortran program is described for calculating and plotting time-temperature-crystallization curves during rapid heating and cooling by, for example, laser glazing, electron beam melting, melt-spinning or other techniques for the production of metallic glasses and metastable phases. Experiments were carried out to demonstrate the applicability of the program. In the case of Fe-B alloys produced by melt-spinning the behaviour during continuous cooling and isothermal annealing could be predicted. In the case of Ni-Nb alloys the program was used to establish the experimental conditions for the formation of metallic glass by electron beam melting. The program was also used to determine the conditions necessary for glass formation by laser melting a surface layer of boron alloyed to the surface of an Fe-Cr substrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540642
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The influence of work hardening and softening on the space-time character of single slip deformation — a computer simulation (1988)
    Springer
    Czechoslovak journal of physics 38 (1988), S. 527-529 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Work hardening and work softening processes during single slip deformation are simulated by computer modelling and presented in the form of space-time diagrams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01597469
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Theoretische Überlegungen zum Erstarrungsverhalten schnell abgeschreckter Schmelzen (1983)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 14 (1983), S. 264-271 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Theoretical Considerations on the Solidification Behaviour of Rapidly Quenched MeltsThe rapid heating, cooling and solidification processes on laser surface melting are calculated. The influence of the laser operating parameters e.g. beam energy density, melting speed and the resultant depth of melt on the solidification parameters cooling rate, solidification rate and temperature gradient is shown. By combining the cooling curves and TTT (CT) curves an attempt can be made to predict the resulting grain size. The use of the programmes is demonstrated for other quenching methods e.g. melt spinning, powder atomizing.
    Notes: In der vorliegenden Arbeit werden die beim Laserumschmelzen ablaufenden schnellen Aufheiz-, Abkühl- und Erstarrungsvorgänge berechnet. Es wird gezeigt, welchen Einfluß die Laserparameter Leistungsdichte, Vorschubgeschwindigkeit und Einschmelztiefe auf die für die Erstarrung relevanten Größen Abschreckgeschwindigkeit, Erstarrungsgeschwindigkeit und Temperaturgradient haben. Durch Kombination der Abkühlkurven mit TTT-Kurven (CT-Kurven) wird versucht, die entstehende mittlere Korngröße vorherzusagen. Beispielhaft wird die Übertragbarkeit der verwendeten Rechenprogramme auf andere Abschreckmethoden (Melt-Spinning, Powder-Atomizing) gezeigt.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19830140805
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  • 5
    Electronic Resource
    Electronic Resource
    Laser Surface Melting on cast iron containing undercooled graphite (1983)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 14 (1983), S. 237-244 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Laser-Oberflächenumschmelzen von Gußeisen mit unterkühltem GraphitAn einer Gußeisenlegierung 3% C, 2% Si und 0,25% Ti mit unterkühltem Graphit wurden Laserumschmelzversuche mit unterschiedlichen Leistungsdichten und Einwirkzeiten durchgeführt. Die sich ergebenden charakteristischen Gefüge nach dem Umschmelzen und verschiedenen Wärmebehandlungszuständen werden beschrieben, ebenso wie die erzielbaren Härtesteigerungen. Beispielhaft wird aufgezeigt, in welcher Weise die Abschreckgeschwindigkeiten und die Konzentration das Erstarrungsverhalten hochkohlenstoffhaltiger Gußeisenlegierungen modifizieren können. Die gewählte Zusammensetzung des Gußeisens besitzt Modellcharakter und kann für viele Gußeisenlegierungen als repräsentativ angesehen werden.
    Notes: Laser surface melting experiments were carried out on an alloy cast iron with 3% C, 2% Si and 0.25% Ti containing undercooled graphite. Different heating times and energy densities were used to achieve different penetration depths and cooling rates. The microstructures obtained after surface melting and after various heat treatments are presented and discussed. It is shown how the cooling rate and concentration influence the solidification behaviour of high carbon cast irons. The composition chosen for the experiments can be considered as representative of many cast irons.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19830140706
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    Paper (German National Licenses)
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