Journal
INTERMETALLICS
Volume 18, Issue 10, Pages 1908-1911Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2010.02.029
Keywords
Composites; Alloy design; Casting; Microstructure
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In this study, we developed ductile dendrite-reinforced composites in the Ti-Zr-Ni-Cu-Be-(Nb) system. Although in situ composites have been successfully obtained by optimizing alloy composition and cooling rate, plasticity does not always occur. Only when the size, distribution, and elastic constants of the constituent phases are properly controlled, i.e. by creating homogeneously distributed dendrites with lower shear modulus than the glassy matrix, the composites exhibit large plasticity. By controlling the microstructural length scale and by tuning the intrinsic elastic constants of the constituent phases Ti-based bulk glassy matrix composites with good mechanical performance (high yield strength of similar to 1.7 GPa and large plasticity of similar to 25%) have been achieved. (C) 2010 Elsevier Ltd. All rights reserved.
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