期刊
INTERMETALLICS
卷 18, 期 10, 页码 1829-1833出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2010.02.042
关键词
Alloy design; Casting; Microstructure
A new class of Al-base multi-phase ultrafine composites with multi-scale microstructure, which exhibits high strength and large compressive plasticity at ambient temperature, has been developed in the Al-Cu-Si ternary system. The formation of the favorable multi-phase multi-modal structure can be achieved by proper alloy selection and by controlling the solidification process. The developed hierarchical ultrafine composites exhibit high fracture strength of similar to 1 GPa and large compressive plasticity up to similar to 25%. The large macroscopic plastic strain is attributed to the combination of dislocation-based slip deformation in the ductile phase and extensive shear banding in the intermetallic phase. (C) 2010 Elsevier Ltd. All rights reserved.
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