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)|
|Date Deposited:||09 Mar 2010 06:27|
|Last Modified:||19 Sep 2010 05:56|
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