Akademska digitalna zbirka SLovenije - logo
VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Anisotropic hardening of materials by particles ; Application of linear elastic fracture mechanics to optimize vacuum-heat-treatment and nitriding of hot-work tool steels
    Bonfoh, Napo ; Lipinski, Paul
    The present study aims to propose a new description of the hardening of polycrystalline materials. This hardening is mainly induced by non-shearable particles. Anisotropic and kinematic hardening of ... this kind of materials has been pointed out in a previous paper (Bonfoh et al., 2003). Contrary to this initial investigation, the proposed modified formulation introduces a non-linear hardening for the single crystal without particles and better renders the material behaviour at finite deformations. The micromechanical modelling is based on a two-level homogenization approach: a micro-mesoscopic transition is firstly performed to derive the equivalent behaviour of single crystal contain ing a volume fraction of intra-crystalline particles. Then, a second transition to the macroscopic scale, leads the elastic-plastic behaviour of the polycrystalline material. Numerical results of the model are analysed in light of internal stress developed during plastic loading. The material behaviour when subjected to a multiaxial loading is also studied through the concept of yield surface. Some other aspects such as the influence of particles size, shape and volume fraction are also investigated.
    Vir: New trends on fatigue and fracture - NT2F6 [Elektronski vir] (4 f.)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2006
    Jezik - angleški
    COBISS.SI-ID - 592810

Vnos na polico