This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Pore Distributions on Ductility of Thin-Walled High Pressure Die-Cast Magnesium
Technical Paper
2013-01-0644
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
Authors
Citation
Choi, K., Li, D., Sun, X., Li, M. et al., "Effects of Pore Distributions on Ductility of Thin-Walled High Pressure Die-Cast Magnesium," SAE Technical Paper 2013-01-0644, 2013, https://doi.org/10.4271/2013-01-0644.Also In
References
- Chadha , G. , Allison , J.E. and Jones , J.W. The Role of Microstructure on Ductility of Die-Cast AM50 and AM60 Magnesium Alloys Metallurgical and Materials Transaction A 38A 286 297 2007
- Song , J. , Xiong , S.M. , Li , M. and Allison , J.E. The Correlation Between Microstructure and Mechanical Properties of High-Pressure Die-Cast AM50 Alloy Journal of Alloys and Compounds 447 863 869 2009
- Sun , X. , Choi , K.S. and Li , D. Ductility Prediction for Magnesium Casting using Microstructure-based Finite Element Method 9 th International Conference on Magnesium Alloys and their Applications July 8 12 2012 Vancouver, British Columbia, Canada
- Sun , X. , Choi , K.S. and Li , D.S. Predicting the Influence of Pore Characteristics on Ductility of Thin-Walled High Pressure Die Casting Magnesium Materials Science and Engineering A 2012
- Weiler , J.P. , Wood , J.T. , Klassen , R.J. , Maire , E. , Berlmortel , R. and Wang , G. Relationship between Internal Porosity and Fracture Strength of Die-cast Magnesium AM60B Alloy Materials Science and Engineering A 395A 315 322 2005
- ABAQUS Analysis User's Manual, Version 6.10
- Hooputra , H. , Gese , H. , Dell , H. and Werner , H. A Comprehensive Failure Model for Crashworthiness Simulation of Aluminium Extrusions International Journal of Crashworthiness 9 449 464 2004
- Cáceres , C.H. On the Effect of Macroporosity on the Tensile Properties of the Al-7%Si-0.4%Mg Casting Alloy Scripta Metallurgica et Materialia 32 1851 1856 1995