Combination of experimental and numerical methods for mechanical characterization of Al-Si alloys

International Materials Research Meeting in the Greater Region: "Current Trends in the Characterisation of Materials and Surface Modification"

Kruglova, A.^1 ; Roland, M.^2 ; DIebels, S.^2 ; Mücklich, F.^1

Department of Functional Materials, Saarland University, Saarbrücken

D-66123, Germany^1

Department of Applied Mechanics, Saarland University, Saarbrücken

D-66123, Germany^2

关键词: Experimental and numerical methods;    Mechanical behavior;    Mechanical characterizations;    Micro-constituents;    Microstructural aspects;    Properties of Al;    Silicon particles;    Uniaxial tensions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/258/1/012004/pdf
DOI  :  10.1088/1757-899X/258/1/012004

来源: IOP

【 摘 要 】

In general, mechanical properties of Al-Si alloys strongly depend on the morphology and arrangement of microconstituents, such as primary aluminium dendrites, silicon particles, etc. Therefore, a detailed characterization of morphological and mechanical properties of the alloys is necessary to better understand the relations between the underlined properties and to tailor the material's microstructure to the specific application needs. The mechanical characterization usually implies numerical simulations and mechanical tests, which allow to investigate the influence of different microstructural aspects on different scales. In this study, the uniaxial tension and compression tests have been carried out on Al-Si alloys having different microstructures. The mechanical behavior of the alloys has been interpreted with respect to the morphology of the microconstituents and has been correlated with the results of numerical simulations. The advantages and limitations of the experimental and numerical methods have been disclosed and the importance of combining both techniques for the interpretation of the mechanical behavior of Al-Si alloys has been shown. Thereby, it has been suggested that the density of Si particles and the size of Al dendrites are more important for the strengthening of the alloys than the size-shape features of the eutectic Si induced by the modification.