scholarly journals Influence of Ni interlayer on interfacial microstructure and mechanical properties of Ti-6Al-4V/AZ91D bimetals fabricated by a solid–liquid compound casting process

2021 ◽  
Author(s):  
Fulin Wen ◽  
Jianhua Zhao ◽  
Miaowang Yuan ◽  
Jingfeng Wang ◽  
Dengzhi Zheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Casting Process ◽  
Interfacial Microstructure ◽  
Microstructure And Mechanical Properties ◽  
Compound Casting ◽  
Ni Interlayer ◽  
Solid Liquid ◽  
Compound Casting Process

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.

scholarly journals Influence of a Zn Interlayer on the Interfacial Microstructures and Mechanical Properties of Arc-Sprayed Al/AZ91D Bimetals Manufactured by the Solid–Liquid Compound Casting Process

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3273 ◽  
Author(s):  
He ◽  
Zhao ◽  
Cheng ◽  
Shangguan ◽  
Wen ◽  
...  
Keyword(s):  
Casting Process ◽  
Arc Spraying ◽  
Optimal Process ◽  
Interface Zone ◽  
Novel Technique ◽  
Compound Casting ◽  
Fracture Behaviors ◽  
Solid Liquid ◽  
Optimal Process Parameter ◽  
Compound Casting Process

A novel technique combining solid–liquid compound casting (SLCC) with arc spraying was designed to manufacture the arc-sprayed Al/AZ91D bimetals with a Zn interlayer. The Al/Mg bimetal was produced by pouring the AZ91D melt into the molds sprayed with Al/Zn double-deck coating, during which the arc-sprayed Zn coating acted as the interlayer. The effect of the Zn interlayer on microstructures, properties, and fracture behaviors of arc-sprayed Al/AZ91D bimetals by SLCC was investigated and discussed in this study. The optimal process parameter was acquired by analyzing the results from different combinations between the arc-spraying time of the Zn coating (10, 18, and 30 s) and the preheat time of the Al/Zn double-deck coating (6 and 12 h). The interfacial microstructures of the arc-sprayed Al/AZ91D bimetals with a Zn interlayer could be approximately divided into two categories: One was mainly composed of (α-Mg + Al5Mg11Zn4) and (α-Al + Mg32(Al, Zn)49) structures, and the other primarily consisted of (α-Mg + Al5Mg11Zn4), (MgZn2 (main) + β-Zn), and (β-Zn (main) + MgZn2) structures. In the interface zone, the (α-Mg + Al5Mg11Zn4) structure was the most abundant structure, and the MgZn2 intermetallic compound had the highest microhardness of 327 HV. When the arc-spraying time of the Zn coating was 30 s and the preheat time of the Al/Zn double-deck coating was 6 h, the shear strength of the arc-sprayed Al/AZ91D bimetal reached 31.73 MPa. Most rupture of the arc-sprayed Al/AZ91D bimetals with a Zn interlayer occurred at the (α-Mg + Al5Mg11Zn4) structure and presented some typical features of brittle fracture.

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