Microstructure and Mechanical Properties of Al/Steel Bimetal Composite Produced by Compound Casting

2019 ◽  
Vol 6 (3) ◽  
pp. 72-79
Author(s):  
Qiang Wang ◽  
◽  
Cheng-Zhi Zhao ◽  
He-Xin Zhang ◽  
Hong Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Compound Casting ◽  
Bimetal Composite

scholarly journals Microstructure and Mechanical Properties of Mg/Al Clad Bars with Ni Interlayer Processed by Compound Castings and Multi-Pass Caliber Rolling

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 704 ◽  
Author(s):  
Lu Chen ◽  
Ying Fu ◽  
Fuxing Yin ◽  
Ning Liu ◽  
Chunyong Liang
Keyword(s):  
Mechanical Properties ◽  
Rolling Force ◽  
Core Layer ◽  
Casting Process ◽  
Rolling Process ◽  
Interfacial Microstructure ◽  
Inhomogeneous Strain ◽  
Microstructure And Mechanical Properties ◽  
Compound Casting ◽  
Ni Interlayer

Magnesium/aluminium clad bars were fabricated by compound casting and multi-pass warm caliber rolling. A Ni interlayer prepared using a plasma spraying process was inserted between the parent metals to improve the interfacial characteristics during the casting process, and the effect of caliber rolling on the evolution of the interfacial microstructure and mechanical properties of the Mg/Ni/Al composites was investigated. The results show that the formation of Mg-Al intermetallic phases was impeded effectively by the Ni interlayer and a typical AZ31/Ni/6061 multilayer structure with metallurgical bonding was formed during the compound casting process. In addition, an inhomogeneous strain distribution in the AZ31 and 6061 alloys were characterized during the rolling process. The AZ31 clad layer accommodated a larger proportion of the plastic strain during the initial passes, while the strain in the Mg core layer increased with increasing number of passes. The Ni interlayer fragmented during the rolling process, and transformed into the dispersed particles at the interface. Meanwhile, the fresh AZ31 and 6061 base alloys squeezed out and bonded together under the rolling force, and a well-bonded interface with no visible defects was formed.

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