期刊
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
卷 17, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0965-0393/17/5/055011
关键词
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资金
- NSERC
- EPSRC [GR/T26344]
- Engineering and Physical Sciences Research Council [GR/T26344/01] Funding Source: researchfish
The methodology of direct finite element (FE) simulation was used to predict the semi-solid constitutive behavior of an industrially important aluminum-magnesium alloy, AA5182. Model microstructures were generated that detail key features of the as-cast semi-solid: equiaxed-globular grains of random size and shape, interconnected liquid films, and pores at the triple-junctions. Based on the results of over fifty different simulations, a model-based constitutive relationship which includes the effects of the key microstructure features fraction solid, grain size and fraction porosity-was derived using regression analysis. This novel constitutive equation was then validated via comparison with both the FE simulations and experimental stress/strain data. Such an equation can now be used to incorporate the effects of microstructure on the bulk semi-solid flow stress within a macro-scale process model.
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