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  • Wiley-Blackwell  (2)
  • 1990-1994  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 22 (1991), S. 81-84 
    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: Veränderung mechanischer Eigenschaften durch die Anwendung thermomechanischer Verfahrenstechniken am Beispiel legierter StähleZwei ausgewählte hochlegierte Warmarbeitsstähle ähnlicher Zusammensetzung wurden thermomechanisch behandelt, wobei die Formgebung - Feinschmieden und Strangpressen - im Temperaturbereich des metastabilen Austenits abläuft. Solange charakteristische Prozeßdaten, wie z. B. Formänderungsgeschwindigkeiten, Umformtemperaturen sowie deren Verteilung vergleichbar sind, sind die am Werkstoff gemessenen mechanischen Kenndaten weitgehend unabhängig vom gewählten Umformverfahren.Durch diese Art der thermomechanischen Behandlung werden die Zugfestigkeits- und Streckgrenzenwerte im Vergleich zum wärmebehandelten Werkstoffzustand deutlich angehoben, während die Verformungsfähigkeit geringfügig abnimmt. Die Verfestigungscharakteristik ist offenbar unabhängig vom gewählten thermomechanischen Verfahren und für alle Werkstoffzustände vergleichbar.
    Notes: Two high alloy tool steels of a similar type were ausformed in the temperature range of the metastable austenite. Swaging and forward extrusion were chosen as deformation process. As long as characteristic properties such as deformation velocities, deformation temperatures and the local distribution of deformation temperatures are similar, the mechanical behaviour of the material is mostly independent of the deformation processes. Mechanical properties, such as tensile strength and yield point, increase by ausforming in comparison to the quenched and annealed material condition. Values for ductility slightly drop. The work hardening capability cannot be related to any specific ausforming process.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 22 (1991), S. 445-448 
    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
    Notes: During the fabrication of tungsten-fibre based composites temperature induced damage mechanisms of the fibre material occur. The corresponding effects on the mechanical behaviour of the composites are a main topic of this paper. A regeneration treatment to restore ductility and strength of both the fibres and the composites will be described.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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