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High-strength bulk Al-based bimodal ultrafine eutectic composite with enhanced plasticity

Park, Jin Man and Mattern, Norbert and Kuehn, Uta and Eckert, Juergen and Kim, Ki Buem and Kim, Won Tae and Chattopadhyay, Kamanio and Kim, Do Hyang (2009) High-strength bulk Al-based bimodal ultrafine eutectic composite with enhanced plasticity. In: Journal of Materials Research, 24 (8). 2605 -2609.

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An in situ bulk ultrafine bimodal eutectic Al-Cu-Si composite was synthesized by solidification. This heterostructured composite with microstructural length scale hierarchy in the eutectic microstructure, which combines an ultrafine-scale binary cellular eutectic (alpha-Al + Al2Cu) and a nanometer-sized anomalous ternary eutectic (alpha-Al + Al2Cu + Si), exhibits high fracture strength (1.1 +/- 0.1 GPa) and large compressive plastic strain (11 +/- 2%) at room temperature. The improved compressive plasticity of the bimodal-nanoeutectic composite originates from homogeneous and uniform distribution of inhomogeneous plastic deformation (localized shear bands), together with strong interaction between shear bands in the spatially heterogeneous structure.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The Materials Research Society.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Users 920 not found.
Date Deposited: 09 Mar 2010 06:27
Last Modified: 19 Sep 2010 05:56
URI: http://eprints.iisc.ac.in/id/eprint/26044

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