Damage behavior and mechanism of SiCp/Al composites under biaxial tension

Author Identifier

L. C. Zhang

ORCID : 0000-0003-0661-2051

Document Type

Journal Article

Publication Title

Materials Characterization

Volume

180

Publisher

Elsevier

School

School of Engineering

RAS ID

36876

Funders

China Postdoctoral Science Foundation Nature Science Foundation of Shaanxi Key Research and Development Plan in Shaanxi Province of China Fundamental Research Fundsfor that Central Universities, CHD Key Laboratory of Advanced Technologies of Materials Ministry of Education China Southwest Jiaotong University

Comments

Yuan, Z., Shen, Q., Liu, H., Xinkai, M., Zhang, X., Fu, Q., . . . Zhang, L. (2021). Damage behavior and mechanism of SiCp/Al composites under biaxial tension. Materials Characterization, 180, article 111402. https://doi.org/10.1016/j.matchar.2021.111402

Abstract

The deformation behavior and damage mechanism of 17 vol% SiCp/Al composites under biaxial loading were studied by biaxial tension and nano-indentation tests. The results showed that in the process of biaxial tension, the composite in rolling normal direction has underwent less severe damage compared to that in the two tensile directions. However, interfacial debonding, particle shedding and microcrack propagation are accompanied in all three directions. The crack size becomes larger as the cracks gradually propagate on the surface of the material, leading to the failure of the composite. The micromechanical properties of the composite show a trend from a slow increase to a sharp increase. In addition, the distribution characteristics of stress, equivalent plastic strain and stress triaxiality of SiCp/Al composites under biaxial tensile stress are simulated by finite element method. The results showed that the stress and strain of composites increase rapidly along the diagonal direction. In the process of deformation, the stress triaxiality increases gradually, which makes the microcracks propagate easily, so the fracture surface of the composite presents a large number of dimples.

DOI

10.1016/j.matchar.2021.111402

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