Accumulative roll bonding (ARS) of the composite coated strips to fabricate multi-component Al-based metal matrix composites

作者：Ana S V Ahmadi; Reihanian M^*; Lotfi B

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2015, 647: 303-312.

DOI：10.1016/j.msea.2015.09.006

• Composites
• Sheet forming
• Electron microscopy
• Mechanical characterization

A multi-component Al-based metal matrix composite was fabricated by accumulative roll bonding (ARB) of the composite coated strips. The Ni/SiC composite layer with three different thicknesses of about 25, 50 and 150 mu m was generated on the Cu substrate by electroplating. The coated strips were placed between two Al strips and processed by ARB up to eight cycles to fabricate the multi-component Al-Cu-Ni/SiC composites. To investigate the microstructure evolution during ARE, an Al-Cu-Ni composite was produced by the same method and using the Cu strips coated with single Ni layer. After eight ARB cycles, the microstructure of Al-Cu-25Ni/SiC composite revealed a uniform distribution of the reinforcements and good bonding at the interfaces. In Contrast, the microstructure of Al-Cu-50Ni/SiC and Al-Cu-150Ni/SiC composites was characterized by cavities and debonding at interfaces and non-uniformity of the reinforcments. The Al-Cu-25Ni/SiC composite exhibited the highest tensile strength of about 310 MPa, in comparison to the annealed Al (47 MPa). The lowest tensile strength was achieved in the Al-Cu-150Ni/SiC composite (about 206 MPa) due to the formation of the cavities and debonding at the interfaces. Fracture surface of the composites revealed a combination of brittle and ductile fracture.

• 出版日期2015-10-28