Sökning: "Al-Zn-Mg"

Hittade 2 avhandlingar innehållade ordet Al-Zn-Mg.

  1. 1. Monotonic and Cyclic Plastic Deformation of High-Strength Aluminium Alloys

    Författare :Magnus Hörnqvist; Chalmers University of Technology; []
    Nyckelord :EN AW-7030; Heat treatment; Temperature effects; Dynamic precipitation.; Strain hardening; Precipitation hardening; Low cycle fatigue; Strain rate effects; AA7030; Al-Zn-Mg; Plastic deformation; Dynamic strain ageing; Mechanical properties;

    Sammanfattning : Dynamic strain ageing (DSA) and dynamic precipitation (DP) are two, closely interrelated, phenomena arising from the dynamic interaction between mobile solute atoms and dislocations. The occurrence of DSA and DP is confined to specific ranges of strain rate and temperature, and aluminium alloys are generally prone to experience DSA and DP already at ambient temperatures and conventional strainrates. LÄS MER

  2. 2. The Plastic Flow Behaviour of Aluminium Alloys Exhibiting Dynamic Strain Ageing

    Författare :Magnus Hörnqvist; Chalmers University of Technology; []
    Nyckelord :Dynamic strain ageing; Portevin-Le Chatelier effect; Temperature sensitivity; Strain rate sensitivity; Al-Zn-Mg; Thermal activation;

    Sammanfattning : The phenomenon known as dynamic strain ageing, abbreviated DSA, has been known since the beginning of last century. It was first discovered as serrations in the load-elongation curve obtained upon deforming specimens of certain alloys in tension. This phenomenon became known as the Portevin-Le Chatelier (PLC) effect. LÄS MER