In this paper, a microstructure-based three-dimensional (3D) finite element modeling method is adopted to investigate the effects of porosity in thin-walled high pressure die-cast (HPDC) magnesium alloys on their ductility. For this purpose, the cross-sections of AM60 casting samples are first examined using optical microscope and X-ray tomography to obtain the general information on the pore distribution features. The experimentally observed pore distribution features are then used to generate a series of synthetic microstructure-based 3D finite element models with different pore volume fractions and pore distribution features. Shear and ductile damage models are adopted in the finite element analyses to induce the fracture by element removal, leading to the prediction of ductility. The results in this study show that the ductility monotonically decreases as the pore volume fraction increases and that the effect of ‘skin region’ on the ductility is noticeable under the condition of same local pore volume fraction in the center region of the sample and its existence can be beneficial for the improvement of ductility. The further synthetic microstructure-based 3D finite element analyses are planned to investigate the effects of pore size and pore size distribution etc.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effects of Pore Distributions on Ductility of Thin-Walled High Pressure Die-Cast Magnesium


    Additional title:

    Sae Technical Papers


    Contributors:
    Li, Dongsheng (author) / Allison, John (author) / Choi, Kyoo Sil (author) / Li, Mei (author) / Sun, Xin (author)

    Conference:

    SAE 2013 World Congress & Exhibition ; 2013



    Publication date :

    2013-04-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Effects of Pore Distributions on Ductility of Thin-Walled High Pressure Die-Cast Magnesium

    Choi, K.S. / Li, D. / Sun, X. et al. | British Library Conference Proceedings | 2013


    Predicting Stress vs. Strain Behaviors of Thin-Walled High Pressure Die Cast Magnesium Alloy with Actual Pore Distribution

    Choi, Kyoo Sil / Barker, Erin / Cheng, Guang et al. | British Library Conference Proceedings | 2016




    High-ductility recycled magnesium alloys

    Grebetz,J.C. / Albright,D.L. / Hydro Magnesium,US | Automotive engineering | 1996