Multi-phase Al-based ultrafine composite with multi-scale microstructure

作者：Park, J. M.^*; Kim, K. B.; Kim, D. H.; Mattern, N.; Li, R.; Liu, G.; Eckert, J.

来源：Intermetallics, 2010, 18(10): 1829-1833.

DOI：10.1016/j.intermet.2010.02.042

• 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.

• 出版日期2010-10
• 单位西安交通大学