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Strengthening and deformation mechanisms in nanolaminated graphene-Al composite micro-pillars affected by graphene in-plane sizes

Lei Zhao - No affiliation found

2019/05/01 Full-length article DOI: 10.1016/j.ijplas.2019.01.006 Journal: International Journal of Plasticity

Abstract:

Highlights•Micro-compression tests were carried on graphene-Al pillars with various graphene in-plane sizes and laminate orientations.•The mechanical mechanisms of graphene-Al pillars were evaluated from loading-unloading cycles and microstructural analyses.•A 3 folds' reduction in the graphene size conferred an over 15% increase in the strength, and a different deformation mode.•The stronger isotropic and kinematic hardenings led to the higher strength of graphene-Al pillars.•The superior constraining effect of smaller graphene size led to the deformation kinking of graphene-Al pillars.